Chemical liquid injection device and chemical liquid injection system

Abstract

To provide a chemical liquid injection system that can read information from a data carrier comprised in a container housing chemical liquid.SOLUTION: A chemical liquid injection system comprises an injection head 110 in which a syringe 800 housing chemical liquid is detachably installed, a control circuit, a reader for reading information from an RFID tag 802 comprised in the syringe 800, and a display device. The control circuit is constituted so as to make the display device display that the syringe 800 is installed in the injection head.SELECTED DRAWING: Figure 5

Description

[Technical Field]

[0001] The present invention relates to a chemical liquid injector and a chemical liquid injection system for injecting a chemical liquid, and more particularly to a chemical liquid injector having a function of monitoring the injection pressure of the chemical liquid while the chemical liquid is being injected and displaying the monitoring result on a display. [Background technology]

[0002] Medical imaging diagnostic devices include CT devices, MRI devices, PET devices, angiography devices, MRA devices, and ultrasound imaging diagnostic devices. When using these devices, contrast agents or medicinal liquids such as saline are often injected into the subject to enhance the contrast effect.

[0003] Typically, a medicinal liquid is filled in a syringe having a cylinder and a piston. A medicinal liquid injector is generally used to inject the medicinal liquid filled in the syringe. The medicinal liquid injector has a syringe holding mechanism and a piston driving mechanism, and can inject the medicinal liquid filled in the syringe into a patient by advancing the piston using the piston driving mechanism while the syringe is held by the syringe holding mechanism. A motor is generally used as the driving source for the piston driving mechanism.

[0004] Injection pressure is one indicator of whether a medicinal liquid is being injected normally into a subject. When a medicinal liquid is being injected normally, the medicinal liquid is injected at an injection pressure within a predetermined range according to the injection route, viscosity, etc. However, if, for example, a leakage of the medicinal liquid occurs along the injection route, the medicinal liquid is injected at an injection pressure lower than the predetermined range. Conversely, if a blockage occurs in the injection route, the injection pressure will be higher than the predetermined range.

[0005] Therefore, Patent Document 1 describes a method for detecting the injection pressure of the medicinal solution in real time, and issuing a warning or stopping the operation of the piston drive mechanism if the detected injection pressure is outside a predetermined range. Patent Document 1 describes a means for controlling the injection pressure, which utilizes a load cell provided in the piston drive mechanism and a means utilizing the change in the current value flowing through the motor (hereinafter also referred to as "motor current") depending on the load acting on the piston drive mechanism; both of these can be used together, or either one can be used alone. Patent Document 1 also describes a method for displaying the detected injection pressure as a graph on a display. [Prior art documents] [Patent documents]

[0006] Patent Document 1: Japanese Patent Application Laid-Open No. 2011-206399 Summary of the Invention [Problem to be solved by the invention]

[0007] The method of detecting the injection pressure using the measurement results of the motor current has the advantage of eliminating the need for a pressure detector such as a load cell, thereby reducing the number of parts compared to using a load cell. However, when the measurement results of the motor current are used to detect the injection pressure and the operation of the piston drive mechanism is stopped when the detected injection pressure exceeds a predetermined limit pressure, the following problems arise.

[0008] The first problem is the possibility of operation being stopped due to false detection in the early stages of injection. When the piston drive mechanism starts to operate, an inrush current flows through the motor. This inrush current increases as the motor load increases, such as when the injection rate of the liquid medicine is relatively high. Therefore, if the inrush current exceeds the motor current at the upper limit of the injection pressure, depending on the injection pressure setting, the liquid medicine injector will determine that the injection pressure has exceeded the upper limit and will stop operation of the piston drive mechanism.

[0009] The second problem is that if the piston drive mechanism (i.e., the motor) is stopped when the injection pressure detected using the motor current measurement reaches a predetermined upper limit, no current flows through the motor while it is stopped, making it impossible to measure the injection pressure. Therefore, if the injection pressure, which changes over time, is displayed in real time on the display, when the motor is stopped, the graph will display zero, even though the injection pressure is actually gradually decreasing. As a result, the user may mistakenly believe that the motor has stopped because the injection pressure was too low, rather than because the injection pressure reached the predetermined limit.

[0010] The object of the present invention is to provide a chemical liquid injection device and a chemical liquid injection system that can eliminate problems such as false detection at start-up and inaccurate graph display that occur when detecting the injection pressure of a chemical liquid using the measurement results of the motor current flowing through the motor that drives the piston drive mechanism. [Means for solving the problem]

[0011] The chemical liquid injector of the present invention is a chemical liquid injector that injects a chemical liquid filled in a syringe having a cylinder and a piston, a piston drive mechanism driven by a motor for moving the piston of the syringe back and forth relative to the cylinder; a motor current measurement circuit for measuring a motor current that is a current flowing through the motor; A display device; an injection device control circuit configured to control the operation of the motor so that the medicinal liquid in the syringe is injected in accordance with an injection protocol for the medicinal liquid, to calculate an injection pressure for the medicinal liquid using a measurement result of the motor current by the motor current measurement circuit, and to display the calculated injection pressure on the display device; and The injection device control circuit is configured to temporarily stop the operation of the motor when the injection pressure reaches a preset limit pressure during the injection operation of the medicinal solution, and to display the limit pressure on the display device as the injection pressure instead of the calculated injection pressure while the operation of the motor is stopped due to the injection pressure reaching the limit pressure.

[0012] The system of the present invention is a system for injecting a medicinal liquid filled in a syringe having a cylinder and a piston into a subject, and capturing a tomographic image of the subject into which the medicinal liquid has been injected, a liquid injector including a piston drive mechanism driven by a motor for moving a piston of the syringe back and forth relative to a cylinder; a motor current measurement circuit for measuring a motor current that is a current flowing through the motor; A display device; an imaging unit that captures a tomographic image of the subject into which the drug solution has been injected; an injection device control circuit configured to control the operation of the motor so that the medicinal liquid in the syringe is injected in accordance with an injection protocol for the medicinal liquid, to calculate an injection pressure for the medicinal liquid using a measurement result of the motor current by the motor current measurement circuit, and to display the calculated injection pressure on the display device; and The injection device control circuit is configured to temporarily stop the operation of the motor when the injection pressure reaches a preset limit pressure during the injection operation of the medicinal solution, and to display the limit pressure on the display device as the injection pressure instead of the calculated injection pressure while the operation of the motor is stopped due to the injection pressure reaching the limit pressure.

[0013] The method for displaying an injection pressure of the present invention is a method for displaying an injection pressure on a display device when a medicinal solution filled in a syringe having a cylinder and a piston is being injected by advancing the piston using a piston drive mechanism driven by a motor, the method comprising: measuring the motor current; calculating an injection pressure using the measurement result of the motor current; displaying the calculated injection pressure on the display device; a step of temporarily stopping the operation of the motor when the calculated injection pressure reaches a preset limit pressure; displaying the limit pressure on the display device instead of the calculated injection pressure as the injection pressure while the operation of the motor is temporarily stopped; It has.

[0014] The computer program of the present invention is a computer program for a liquid medicine injector that injects a liquid medicine filled in a syringe having a cylinder and a piston by advancing the piston using a piston drive mechanism driven by a motor, and displays the injection pressure of the liquid medicine on a display device, measuring the motor current; calculating an injection pressure using the measurement result of the motor current; displaying the calculated injection pressure on the display device; a step of temporarily stopping the operation of the motor when the calculated injection pressure reaches a preset limit pressure; displaying the limit pressure on the display device instead of the calculated injection pressure as the injection pressure while the operation of the motor is temporarily stopped; The present invention is a computer program for causing a liquid injector to execute the above. [Effects of the Invention]

[0015] According to the present invention, in a liquid medicine injection device that calculates the injection pressure of a liquid medicine using the measurement results of the motor current flowing through the motor that drives the piston drive mechanism and displays the calculated injection pressure on a display device, even if the operation of the motor is stopped because the injection pressure reaches a limit pressure, it is possible to display an injection pressure that is close to the actual injection pressure. [Brief explanation of the drawings]

[0016] [Figure 1] 1 is a perspective view of a fluoroscopic imaging system in accordance with an embodiment of the present invention; [Figure 2] FIG. 2 is a front view of the console shown in FIG. [Figure 3] 2 is a perspective view of the injection head shown in FIG. 1 with a syringe attached. FIG. [Figure 4] 4 is a diagram illustrating the attachment of a syringe via an adapter to the injection head shown in FIG. 3. FIG. [Figure 5] FIG. 2 is a block diagram of the chemical liquid injector shown in FIG. [Figure 6] 10 is a cross-sectional view showing the positional relationship between the RFID tag and the antenna of the RFID module when the syringe is normally held by the cylinder holding mechanism. FIG. [Figure 7] 10 is a graph showing the relationship between the time from the start of the injection operation and the injection rate according to one embodiment of the present invention. [Figure 8] 10 is a graph showing the relationship between time and injection pressure when the motor operation is stopped when the injection pressure reaches a limit pressure. [Figure 9] 1 is a graph illustrating an example of actual injection pressure (Pr), calculated injection pressure (pc), and displayed injection pressure (Pd) over time, according to one embodiment of the present invention. [Figure 10A] FIG. 1 is a plan view of an example of a switch unit that can be used in the present invention. [Figure 10B] FIG. 10B is a bottom view of the switch unit shown in FIG. 10A. [Figure 10C] FIG. 10B is a front view of the switch unit shown in FIG. 10A. [Figure 10D] FIG. 10B is a rear view of the switch unit shown in FIG. 10A. [Figure 10E] FIG. 10B is a right side view of the switch unit shown in FIG. 10A. [Figure 10F] FIG. 10B is a left side view of the switch unit shown in FIG. 10A. [Figure 10G] 10B is a perspective view showing a state in which the switch unit shown in FIG. 10A is used. FIG. [Figure 11] FIG. 1 is a perspective view showing a specific structure of an example of a syringe that can be used in the present invention. [Figure 12] FIG. 10 is a perspective view showing the specific structure of another example of a syringe that can be used in the present invention. [Figure 13] FIG. 10 is a perspective view showing another example of a stand for supporting an injection head, with the injection head attached. [Figure 14] FIG. 10 is a perspective view showing another example of an injection head supported by a stand. [Figure 15] FIG. 10 is a block diagram of a chemical liquid injection system according to another embodiment of the present invention. [Figure 16A] 10 is an example of a display screen when an injection protocol is preset. [Figure 16B] 10 is an example of a display screen when an injection protocol is preset. [Figure 16C] 10 is an example of a display screen when an injection protocol is preset. [Figure 17] FIG. 10 is a diagram showing an example of a screen display when a syringe with an RFID tag is attached and detected. [Figure 18] FIG. 10 is a diagram showing an example of a screen display when a syringe with an RFID tag is attached and detected. DETAILED DESCRIPTION OF THE INVENTION

[0017] 1 shows a fluoroscopic imaging system according to one embodiment of the present invention, which includes a fluoroscopic imaging apparatus 200 and a liquid injector 100. The fluoroscopic imaging apparatus 200 and the liquid injector 100 can be connected to each other so that data can be transmitted and received between them. The connection between the fluoroscopic imaging apparatus 200 and the liquid injector 100 can be wired or wireless.

[0018] Imaging fluoroscopic apparatus 200 has scanner 201 that performs imaging operations and an imaging control unit (not shown) that controls the operation of scanner 201, and can capture tomographic images of a subject into which a liquid has been injected by liquid injector 100. The imaging control unit can have a monitor that can display a screen for setting imaging conditions, captured tomographic images, and various other information related to imaging.

[0019] Liquid injector 100 includes, for example, injection head 110 attached via swivel arm 122 to the top of stand 121, and console 101 for controlling the overall operation of liquid injector 100. In this embodiment, injection head 110 and console 101 are configured as separate units. Stand 121 may be a stand with casters to facilitate movement of injection head 110.

[0020] An AC adapter 141 is connected to the console 101, and power converted from AC to DC is supplied to the console 101. As shown in Fig. 2, the console 101 has a group of buttons 102 including a stop button 102a for forcibly stopping injection, a home button 102b for displaying a home screen, and a power button 102c for turning the power on and off, and a touch panel 103 that serves as both an input device and a display device.

[0021] As shown in Fig. 3, syringe 800 filled with a liquid medicine, such as a contrast agent, can be detachably attached to injection head 110. Syringe 800 has a cylinder that contains the liquid medicine and has a conduit at its tip, and a piston that is inserted into the cylinder and can move back and forth. Injection head 110 has cylinder holding mechanism 111 that holds this cylinder, and presser 112 that operates to press the piston of syringe 800, whose cylinder is held by cylinder holding mechanism 111, into the cylinder.

[0022] Presser 112 is fixed to the tip of rod 113, which is moved back and forth by an appropriate rotational motion conversion mechanism, such as a lead screw mechanism or a rack and pinion mechanism, that converts the rotational motion of the motor into linear motion. In the present invention, the mechanism that includes the motor, rotational motion conversion mechanism, rod 113, and presser 112 and that moves the piston back and forth is referred to as the piston drive mechanism. The piston drive mechanism, excluding presser 112, is housed inside exterior body 115 made of synthetic resin.

[0023] The motor that drives the piston drive mechanism can be a DC motor, with DC brushless motors being particularly preferred. Brushless motors, lacking brushes, are quieter and more durable. Furthermore, because brushless motors are capable of higher rotation speeds, increasing the external gear ratio and reducing the torque applied to the motor can reduce the current required to inject the chemical solution at the desired injection pressure compared to brushed motors. Furthermore, brushless motors typically include a sensor, such as a Hall sensor, to detect the position of the internal magnet. The output from this sensor can easily determine the motor's rotational speed and rotational amount. Since the motor's rotational speed and rotational amount correspond to the position and movement speed of the presser 112, the motor's sensor can be used to detect the injection volume and other parameters. This eliminates the need for a sensor for detecting the injection volume and other parameters in the injection head 110, simplifying the configuration of the injection head 110.

[0024] Except for a portion of the piston drive mechanism (e.g., presser 112), injection head 110 is entirely covered in a synthetic resin housing 115. Several operation buttons 116 are arranged on the top surface of housing 115 so that the piston drive mechanism can be operated by a user.

[0025] The injection head 110 of this embodiment has operation buttons 116, including a check button 116a operated to prepare the device for injection, a start button 116b operated to start injection, a forward button 116c operated to move the presser 112 forward a desired distance (for example, at an injection rate of 1.5 ml / sec), an acceleration button 116d operated to accelerate the movement speed of the presser 112 (for example, to add an additional 8 ml / sec to the current injection rate; both forward and backward movement is possible), a backward button 116e operated to move the presser 112 backward a desired distance (for example, at an injection rate of 1.5 ml / sec), an auto-return button 116f operated to move the presser 112 backward to the initialized position, stop buttons 116g and 116h operated to manually stop or interrupt operation, and a route switch 116i operated to move the presser forward / backward at a slow speed (for example, 0.7 ml / sec).

[0026] Cylinder holding mechanism 111 is configured so that syringe 800 can be attached via adapter 600. Syringes 800 come in a variety of sizes depending on the volume of medicinal liquid that can be filled. Adapters 600 are provided for each size of syringe 800, and as shown in FIG. 4, each adapter is configured to hold cylinder flange 801 formed at the end of the cylinder of the corresponding syringe 800. Adapters 600 are detachably attached to cylinder holding mechanism 111 of injection head 110.

[0027] Syringe 800 can be attached to injection head 110, for example, by attaching adapter 600 to cylinder holding mechanism 111 of injection head 110 and then holding the cylinder flange 801 of syringe 800 in adapter 600. Adapter 600 has a groove that receives cylinder flange 801, and syringe 800 is held in adapter 600 by inserting cylinder flange 801 into the groove. Adapter 600 may also have a locking mechanism that locks the cylinder by rotating syringe 800 a predetermined angle (e.g., 90 degrees) around its axis after cylinder flange 801 is inserted into the groove of adapter 600. By using adapter 600 in this way, syringes 800 of various sizes can be attached to injection head 110.

[0028] Syringe 800 may be a pre-filled syringe provided by a pharmaceutical manufacturer in a state filled with a medicinal solution, or may be a field-filled syringe filled with a medicinal solution at a medical site.

[0029] 1 , liquid injector 100 may further include power supply box 130 configured as a separate unit from injection head 110. Power supply box 130 converts AC power input via power cable 142 into DC power and supplies the converted DC power via head cable 143 connecting injection head 110 and power supply box 130.

[0030] When injecting a liquid into a subject and capturing images, scanner 201, injection head 110, and power supply box 130 of the above-described configuration are installed in an examination room, while the imaging control unit of imaging fluoroscopic apparatus 200 and console 101 of liquid injector 100 are installed in an operation room separated from the examination room by a wall. Therefore, wireless communication is preferred for transmitting and receiving signals and data between console 101 and injection head 110. Of course, wired communication is also possible using a cable routed through a cable passage formed in the wall separating the examination room and the operation room. In this embodiment, power supply box 130 has wireless communication capabilities, and signals are transmitted and received between console 101 and injection head 110 via power supply box 130.

[0031] The functions of the above-described chemical liquid injector 100 will be described below with reference to the block diagram shown in Fig. 5. Note that Fig. 5 shows only the main functions of chemical liquid injector 100 according to this embodiment, and the present invention is not limited thereto.

[0032] Power supply box 130 includes AC / DC power supply unit 156 and wireless communication module 155. AC / DC power supply unit 156 converts AC power supplied from a commercial power source via power cable 142 into DC power and supplies it to wireless communication module 155 and injection head 110. Wireless communication module 155 includes a communication antenna 157 and mediates the transmission and reception of signals between console 101 and injection head 110. In this embodiment, wireless communication module 155 is configured to communicate with console 101 wirelessly and with injection head 110 via head cable 143 via a wired connection. However, wireless communication with injection head 110 may also be configured to be performed wirelessly. Alternatively, wireless communication module 155 may be built into injection head 110, allowing direct wireless communication between console 101 and injection head 110.

[0033] The console 101 includes a power supply module 151, a console control circuit 152, a wireless communication module 153, a switch circuit 154, and the touch panel 103 described above.

[0034] Power supply module 151 supplies DC power received via AC adapter 141 to console control circuit 152, wireless communication module 153, switch circuit 154, and touch panel 103. Switch circuit 154 includes buttons 102 shown in FIG. 2 and their drive circuits, and transmits signals corresponding to the operation of buttons 102 to console control circuit 152. Wireless communication module 153 includes an antenna (not shown), and transmits signals received from injection head 110 to console control circuit 152 via wireless communication module 155 in power supply box 130, and also transmits signals received from console control circuit 152 to injection head 110.

[0035] The console control circuit 152 controls the screen and data to be displayed on the touch panel 103 in response to signal input from the switch circuit 154 (operation of the button group 102), signal input from the wireless communication module 153, and signal input from the touch panel 103, creates an injection protocol for the medicinal liquid based on data input from the touch panel 103 and data transmitted from the injection head 110, and transmits data related to the created injection protocol to the injection head 110 via the wireless communication module 153 and the power supply box 130.

[0036] The console control circuit 152 can be configured as a so-called one-chip microcomputer, and can have hardware such as a CPU, ROM, RAM, interface, etc. A computer program is installed in the ROM, and the CPU controls each section of the console 101 by executing various processing operations in accordance with this computer program.

[0037] The touch panel 103 is a modularized device that includes a display as a display device, a touch screen as an input device, and control circuits for these, and displays predetermined screens and data on the display based on signals transmitted from the console control circuit 152, and transmits input information based on signals detected by the touch screen to the console control circuit 152. Any display can be used as the display, including a liquid crystal display and an organic EL display.

[0038] Injection head 110 includes a head control circuit 158 ​​, a power supply circuit 159 , a head switch circuit 160 , a piston drive mechanism 161 equipped with a motor 162 , a motor current measurement circuit 163 , and an RFID module 166 .

[0039] The power supply circuit 159 supplies DC power, which is supplied from the power supply box 130 via the head cable 143, to the head control circuit 158, the head switch circuit 160, the motor 162, the motor current measuring circuit 163, and the RFID module 166. The head switch circuit 160 includes the operation button 116 shown in FIG. 3 and its drive circuit, and transmits a signal according to the operation of the operation button 116 to the head control circuit 158.

[0040] RFID module 166 has an RFID control circuit 164 and an antenna 165. In this embodiment, syringe 800 has an RFID tag 802, which is a data carrier, attached to the outer circumferential surface of its cylinder (see FIG. 4 ). RFID module 166 reads information recorded in RFID tag 802, which is an IC tag, from RFID tag 802 and transmits the read information to head control circuit 158. RFID module 166 may also have a function of writing information transmitted from head control circuit 158 ​​to RFID tag 802. RFID control circuit 164 controls the transmission and reception operations of RFID module 166. That is, RFID module 166 functions as a reader that reads information from RFID tag 802, or as a reader / writer that writes information to RFID tag 802.

[0041] The output of RFID module 166 can be set to, for example, 200 mW, which enables detection over a wider range and also enables transmission and reception of information through the medicinal liquid filled in syringe 800.

[0042] The information recorded on RFID tag 802 may include, for example, information regarding the liquid medicine filled in syringe 800, such as the manufacturer, type of liquid medicine, product number, contained ingredients (especially, the iodine content concentration if the liquid medicine is a contrast medium), filled amount, lot number, expiration date, etc., as well as information regarding the syringe, such as a unique identification number, allowable pressure value, syringe capacity, piston stroke, necessary dimensions of each part, lot number, etc. At least a part of this information can be transmitted to imaging fluoroscopic apparatus 200 via a wired or wireless connection means for transmitting and receiving data between imaging fluoroscopic apparatus 200 and liquid injector 100.

[0043] RFID control circuit 164 can be installed at any position on injection head 110, but it is desirable to install antenna 165 in a position facing RFID tag 802 when syringe 800 is properly held in cylinder holding mechanism 111.

[0044] 4, RFID tag 802 has a shape with a longitudinal direction, and is attached so that the longitudinal direction coincides with the circumferential direction of syringe 800. Syringe 800 is inserted into the groove of cylinder holding mechanism 111, and then is normally held by rotating syringe 800 so that it is oriented in a specific direction, and is designed so that RFID tag 802 faces downward when held in this state.

[0045] Antenna 165 of RFID module 166 has an FPC (flexible printed circuit board) on which a predetermined pattern (for example, one or more loop-shaped patterns) made of a conductor is formed, and as shown in Fig. 6, is arranged in a position facing RFID tag 802, bent into an arc so as to be concentric with syringe 800. This aims to expand the detection range of RFID tag 802 attached to a curved surface.

[0046] Furthermore, in this embodiment, antenna 165 has a larger area than RFID tag 802 so that RFID tag 802 can reliably face antenna 165 even if there is variation in the attachment position of RFID tag 802. Therefore, it is preferable to design the size of antenna 165 taking into consideration variation in the attachment position of RFID tag 802 on syringe 800.

[0047] On the other hand, when antenna 165 is bent into an arc, the smaller the radius of curvature of antenna 165 and the longer the circumferential length of antenna 165, the more likely radio waves for communication to interfere with each other, and communication sensitivity tends to decrease. Therefore, in order to suppress radio wave interference, antenna 165 preferably has ferrite sheet 165a on the surface opposite to the surface facing RFID tag 802 of the FPC.

[0048] Referring again to Figure 5, the head control circuit 158 ​​controls the operation of the motor 162, which is the driving source of the presser 112 (see Figure 3) of the piston drive mechanism 161, in accordance with input from the head switch circuit 160 (operation of the operation button 116) and the injection protocol transmitted from the console control circuit 152 of the console 101, transmits information read by the RFID module 166 from the RFID tag 802 to the console control circuit 152, and controls the overall operation of the injection head 110.

[0049] Head control circuit 158 ​​can be configured as a so-called one-chip microcomputer, and can have hardware such as a CPU, ROM, RAM, interface, etc. A computer program is installed in the ROM, and the CPU controls each part of injection head 110 by executing various processing operations in accordance with this computer program.

[0050] One of the things that must be taken into consideration when injecting the liquid medicine filled in syringe 800 into a subject using liquid medicine injector 100 is the pressure resistance value of syringe 800 and the injection path (tubing, injection needle, etc.) from syringe 800 to the subject. When the viscosity of the drug is high, when the liquid medicine is injected at high speed, or when the diameter of the injection path is small, high pressure acts on syringe 800. If the injection pressure of the liquid medicine exceeds this pressure resistance value, syringe 800 may be damaged or the liquid medicine may leak from the injection path.

[0051] Liquid injector 100 of this embodiment is configured to detect and monitor the injection pressure of the liquid in real time to ensure that the injection pressure does not exceed the withstand pressure of syringe 800. The injection pressure is detected using the motor current, which is the value of the current flowing through motor 162. To measure the motor current, injection head 110 further includes motor current measurement circuit 163 that measures the motor current.

[0052] When the presser 112 (see FIG. 3), which operates using the motor 162 as a drive source, is advanced to push the piston of the syringe 800 into the cylinder, thereby injecting the liquid medicine, the injection pressure and the magnitude of the load acting on the motor 162 are proportional to each other. In other words, the higher the injection pressure, the greater the load acting on the motor 162. On the other hand, the magnitude of the current flowing through the motor 162 to rotate it is proportional to the magnitude of the load acting on the motor 162. Therefore, the injection pressure of the liquid medicine and the motor current are proportional to each other, and the injection pressure can be calculated from the motor current.

[0053] In this embodiment, the motor current measured by the motor current measurement circuit 163 is transmitted as data to the head control circuit 158, and the head control circuit 158 ​​further has the function of calculating the injection pressure using the measurement results of the motor current transmitted from the motor current measurement circuit 163.

[0054] When calculating the injection pressure, the no-load current of the motor 162 and a proportionality constant for correlating the measured value of the motor current with the injection pressure are taken into consideration. The no-load current increases as the rotation speed of the motor 162 increases. Therefore, in order to more accurately determine the motor current according to the load, it is preferable to subtract this no-load current from the actual motor current. If the injection pressure is P, the motor current value when the motor 162 is rotating at a certain rotation speed is C1, the no-load current value at that rotation speed is C0, and the proportionality constant is a, the injection pressure P can be calculated using the following equation: P=a(C1-C0) It can be found by:

[0055] Furthermore, head control circuit 158 ​​transmits the calculated injection pressure to console control circuit 152, and console control circuit 152 transmits the transmitted injection pressure data to touch panel 103 for display on touch panel 103. The combined functions of console control circuit 152 and head control circuit 158 ​​correspond to the injection device control circuit of the present invention.

[0056] Next, a more detailed description will be given of the operation of the above-described chemical liquid injection system 100. In chemical liquid injector 100 of this embodiment, the operations in the preparation stage for chemical liquid injection, such as holding syringe 800 and removing air from syringe 700 and the injection path, can be the same as in the conventional system, and therefore the operations after the preparation stage is completed will be described here.

[0057] When the preparation stage is complete, the presser 112 abuts against the end of the piston of the syringe 800. The console control circuit 152 creates an injection protocol with parameters such as injection rate, injection amount, and injection time based on information obtained from the RFID tag 802 and data input from the touch panel 103. The injection path from the syringe 800 to the subject is established, and a limit pressure, which is a standard for limiting the injection pressure so that pressure exceeding the allowable pressure is not applied to the tools used for injection (such as the syringe 800, tubing, and injection needle), is set. The created injection protocol can be displayed on the touch panel 103 in the form of graphics or numerical data. The injection protocol has also been approved by the operator.

[0058] In this state, when the operator presses the start button of the operation buttons on injection head 110, a corresponding signal is sent from head switch circuit 160 to head control circuit 158, which then issues a command to console control circuit 152 requesting transmission of injection protocol data. In response to this command, console control circuit 152 transmits the injection protocol data to head control circuit 158. Upon receiving the injection protocol data, head control circuit 158 ​​drives motor 162 of piston drive mechanism 161 based on the data, thereby enabling the medicinal liquid filled in syringe 800 to be injected into the subject.

[0059] An injection protocol indicates what kind of medicinal liquid is to be injected, in what amount, and at what speed. The injection speed may be constant or may vary over time. Furthermore, when multiple types of medicinal liquids, such as a contrast medium and saline, are to be injected, the injection protocol also includes information on the order in which these medicinal liquids should be injected. Any known injection protocol can be used as the injection protocol. Furthermore, the procedure for creating the injection protocol may also be any known procedure.

[0060] When a contrast agent is injected as a medicinal liquid, for example, the contrast effect of the contrast agent varies from subject to subject. In order to understand the degree of this individual difference in the contrast effect, a test injection of the medicinal liquid is performed prior to the injection for capturing a tomographic image using the imaging fluoroscopic apparatus 200, in which an amount of the medicinal liquid is injected that is smaller than the amount injected for capturing the image, and the timing of capturing the image is determined based on the result of the test injection.

[0061] In such a case, the injection operation of the liquid after the test injection can be started by the console control circuit 158 ​​receiving a command transmitted from the imaging fluoroscopic apparatus 200. The imaging fluoroscopic apparatus 200 can, for example, capture a tomographic image displayed on the monitor of the imaging fluoroscopic apparatus 200 with a CCD camera (not shown), monitor the brightness (whiteness) of the ROI of the tomographic image, and transmit a command to start the injection operation to the console control circuit 158 ​​when the brightness exceeds a predetermined threshold, or measure the signal strength from a cable connected to the monitor, and when the measurement result exceeds a predetermined threshold. Furthermore, when a test injection is performed prior to injection for capturing a tomographic image (main injection), the CT value and TDC (Time Density Curve) during the test injection can be monitored, an injection protocol can be determined based on the results, and an optimal imaging start command suitable for the protocol can be transmitted from the liquid injector 100 to the imaging fluoroscopic apparatus 200.

[0062] During the injection operation, the motor current is repeatedly measured at regular intervals by the motor current measuring circuit 163, and each measurement is transmitted as data to the head control circuit 158. Using the transmitted motor current data, the head control circuit 158 ​​calculates the injection pressure as a measured value. The calculated injection pressure is transmitted as data to the console control circuit 152.

[0063] Meanwhile, in the console 101, the limit pressure is set based on data input from the touch panel 103 and data acquired from the RFID tag 802 by the RFID module 166 and transmitted via the head control circuit 158. The set limit pressure is sent to the head control circuit 158 ​​prior to the injection operation. The injection pressure sent from the head control circuit 158 ​​is also displayed on the touch panel 103 as a numerical value or as an injection graph (for example, a graph showing the change in injection pressure over time, with the horizontal axis representing time and the vertical axis representing injection pressure).

[0064] The injection operation of the liquid medicine is carried out in the head control circuit 158 ​​while the calculated injection pressure is compared with the limit pressure sent from the console control circuit 152. If the injection pressure does not exceed the limit pressure during this injection operation (and if no other errors occur), the head control circuit 158 ​​executes the injection operation of the liquid medicine by driving the motor 162 in accordance with the injection protocol from the console control circuit 152.

[0065] When the injection pressure reaches the limit pressure as a result of comparing the injection pressure with the limit pressure, the head control circuit 158 ​​temporarily stops the operation of the motor 162 and restarts the motor 162 after a predetermined time has elapsed. Stopping the operation of the motor 162 gradually reduces the injection pressure. Therefore, the time for temporarily stopping the motor 162 can be set to a time such that the limit pressure will not be reached even if the motor 162 is restarted, for example, 0.1 to 1 second, preferably 0.2 to 0.5 seconds. Furthermore, the driving conditions for the motor 162 when restarting the motor 162 are the driving conditions after the time when the motor 162 was stopped has elapsed. If the injection pressure does not decrease even after the above-described period of repeatedly stopping and restarting the motor 162 has elapsed, for example, five seconds, the head control circuit 158 ​​may determine that a blockage has occurred in the injection path from the syringe 800 to the subject, and may stop the injection of the medicinal liquid, i.e., the operation of the motor 162.

[0066] When the injection pressure reaches the limit pressure, the operation of motor 162 is temporarily stopped, thereby controlling the liquid injection operation so that the injection pressure does not exceed the limit pressure. The operator can change the set value of this limit pressure as needed, but liquid injector 100 often has an extreme pressure set in addition to the limit pressure. The extreme pressure is fixedly set in the liquid injector itself as a safety measure in case the limit pressure is exceeded due to some abnormality, and cannot be changed by the operator. The limit pressure is set to a value smaller than the extreme pressure.

[0067] The above is the basic flow of the chemical liquid injection operation. In this embodiment, the following operations are further performed.

[0068] First, when the piston drive mechanism 161 is started, i.e., when the motor 162 is started, such as when the drug solution injection begins, the head control circuit 158 ​​does not drive the motor 162 so that it reaches the target speed immediately after start-up, but rather increases the rotation speed of the motor 162 over time so that it reaches the target speed within a predetermined time from the start of start-up.

[0069] When the motor 162 starts up, a large inrush current several times the rated current flows, and once it starts rotating, it operates with a normal current. The motor current measurement circuit 163 measures this inrush current as well as the motor current value during the injection operation, and outputs the current value data to the head control circuit 158. The head control circuit 158 ​​calculates the injection pressure using the inrush current input from the motor current measurement circuit 163.

[0070] Therefore, depending on the magnitude of the inrush current, the calculated injection pressure may exceed the limit pressure, which may result in the motor 162 being stopped before the liquid medicine is injected, preventing the liquid medicine from being injected. Therefore, in this embodiment, as shown in Fig. 7, the rotation speed of the motor 162 is increased over time so that the actual injection rate (IRr) reaches the target injection rate (IRs) at the target arrival time (T1), which is the time when a predetermined time has elapsed since the start of injection. This prevents the injection operation from being stopped by the inrush current.

[0071] The target arrival time (T1) at which the actual injection rate (IRr) reaches the target injection rate (IRs) may be any time within which the inrush current to the motor 162 does not affect the calculation of the injection pressure. This time can be set arbitrarily depending on the characteristics of the motor 162 and injection conditions, such as the injection volume and injection time of the medicinal liquid. Specifically, the target arrival time (T1) can be set to 1 to 2 seconds. This control of motor startup by the head control circuit 158 ​​can be applied not only to the start of injection, but also to all cases in which the motor 162 is started from a stopped state. For example, if the injection protocol includes an interval during which the injection of the medicinal liquid is temporarily suspended, the above control can also be applied when the injection of the medicinal liquid is resumed after the interval. Furthermore, in the case of an injection protocol including an injection rate that changes over time, the target injection rate (IRs) is set to the injection rate at the target arrival time (T1).

[0072] Secondly, the console control circuit 152 controls the display of the injection speed of the liquid medicine on the touch panel 103 during the injection operation in response to the on / off state of the motor 162.

[0073] If the injection pressure of the drug solution is calculated using the measurement results of the motor current and the operation of motor 162 is temporarily stopped when the calculated injection pressure reaches a preset limit pressure, the injection pressure will be calculated as zero because no motor current flows while the operation of motor 162 is stopped. Therefore, if the injection pressure during the injection operation is displayed in real time as a graph or numerical value on touch panel 103, the following phenomenon will occur.

[0074] For example, as shown in Fig. 8, when the injection pressure reaches the limit pressure Pl after time t1 from the start of injection and the operation of the motor 162 is stopped, the injection pressure gradually decreases thereafter. However, as shown in Fig. 9, the injection pressure Pc calculated using the measurement results of the motor current becomes zero when the operation of the motor 162 is stopped, and becomes significantly different from the actual injection pressure.

[0075] Therefore, in this embodiment, the console control circuit 152 controls the display on the touch panel 103 so that, during the period when the calculated injection pressure (Pc) reaches the limit pressure (Pl) and the operation of the motor 162 is temporarily stopped (the period from time t1 to t2), the limit pressure (Pl) is displayed as the injection pressure instead of the calculated injection pressure (Pc), and after the motor 162 is restarted, the injection pressure (Pc) calculated using the measurement results of the motor current is displayed, as shown in Fig. 9. In Fig. 9, Pr indicates the actual injection pressure, and Pd indicates the injection pressure displayed on the touch panel 103.

[0076] Note that, because an inrush current flows when the motor 162 is restarted, the head control circuit 158 ​​controls the motor 162 taking the inrush current into consideration as described above when restarting the motor 162. When the injection rate reaches the target injection rate, the console control circuit 152 switches the injection pressure display on the touch panel 103 from the limit pressure (Pl) to the calculated injection pressure (Pc). Although this is a visual issue, the boundary before and after the change in display may be complemented with a curve to prevent the injection graph from appearing unnatural. Also, while FIG. 9 illustrates an example in which the display on the touch panel 103 is an injection graph showing the change in injection pressure over time, with the horizontal axis representing time and the vertical axis representing injection pressure, it is preferable to apply the above to cases in which the injection pressure is displayed numerically.

[0077] By controlling the display on touch panel 103 in this way, it is possible to display a more realistic injection pressure even while motor 162 is temporarily stopped. As a result, the operator can easily determine that the stopping of motor 162 during an injection operation is the result of preventing the injection pressure from exceeding the limit pressure.

[0078] The present invention has been described above using representative embodiments, but the present invention is not limited to the above-described embodiments and can be modified as desired within the scope of the technical concept of the present invention.

[0079] For example, in the embodiment described above, the motor current is measured at regular time intervals, and the injection pressure is calculated each time. However, the injection pressure may be calculated by accumulating the most recent measured values ​​(e.g., 5 to 10 times) and averaging the accumulated measured values. This reduces the effects of errors and variations in the measured values, making it possible to calculate an injection pressure that is closer to the actual injection pressure.

[0080] The calculated injection pressure can also be used to warn when an empty syringe 800 that is not filled with a liquid drug is mistakenly attached to injection head 110 and an injection operation is performed in that state, or when an injection operation is performed without a syringe 800 attached. In these cases, an extremely small pressure is measured. Therefore, for example, when the injection rate is 3.0 ml / sec or higher, the measured pressure may be 49×10 3 If an injection operation of 10 or more ml is performed at a pressure of 0.01 Pa or less, the head control circuit 158 ​​or the console control circuit 152 can determine that the injection operation is being performed using an empty syringe 800 or that the injection operation is being performed without a syringe attached, and can execute a corresponding process. Examples of corresponding processes include stopping the injection operation, displaying on the touch panel 103 (see FIG. 2) that an empty syringe is attached or that no syringe is attached, and issuing a sound or audio warning from a sound generating device (not shown) such as a buzzer.

[0081] In the above-described embodiment, liquid injector 100 has console control circuit 152 and head control circuit 158, and functions related to the overall control of liquid injector 100 are assigned to these circuits. However, the assignment of functions to each control circuit can be changed as appropriate depending on the respective roles of console 101 and injection head 110. Alternatively, console control circuit 101 and head control circuit 110 can be integrated into a single control circuit, and the operation of liquid injector 100 as a whole can be controlled by this integrated control circuit. When an integrated control circuit is used, the integrated control circuit may be provided in either console 101 or injection head 110.

[0082] Furthermore, some or all of the functions of head control circuit 158, including the determination (calculation) of the injection protocol, and / or some or all of the functions of console control circuit 152 may be incorporated into a unit separate from liquid injector 100, such as imaging fluoroscopic apparatus 200. In particular, if the functions related to the determination (calculation) of the injection protocol are incorporated into imaging fluoroscopic apparatus 200, there is no need to redundantly input data common to the setting of imaging conditions and the setting of injection conditions into imaging fluoroscopic apparatus 200 and liquid injector 100. Furthermore, if all of the functions of console control circuit 152 are incorporated into imaging fluoroscopic apparatus 200, console 101 of liquid injector 100 is not required, thereby simplifying the entire system. Conversely, functions related to the setting of imaging conditions by imaging fluoroscopic apparatus 200 may be incorporated into liquid injector 100, thereby eliminating the need for a console for imaging fluoroscopic apparatus 200.

[0083] The functions of the console control circuit 152 and the head control circuit 158 ​​can be realized by using various hardware as needed, but are primarily realized by the CPU functioning in accordance with a computer program.

[0084] The computer program can be implemented as software for executing processes including at least the steps of measuring the motor current, which is the current flowing through the motor 162 that is the driving source of the piston driving mechanism 166; calculating the injection pressure using the measurement result of the motor current; displaying the calculated injection pressure on a display device; temporarily stopping the operation of the motor 162 when the calculated injection pressure reaches a preset limit pressure; and displaying the limit pressure instead of the calculated injection pressure as the injection pressure on the display device while the operation of the motor 162 is temporarily stopped.

[0085] Structurally, injection head 110 and power supply box 130 may be integrated, and console 101 may also be integrated. If console 101 and injection head 110 are integrated, the console will also be located in the examination room. Therefore, it is preferable to use a remote controller to start and stop the injection operation. By using the remote controller, the operator can control the start and stop of the injection operation from within the operation room. The remote controller may be, for example, as shown in Figures 10A to 10G, which will be described in detail later.

[0086] In the above-described embodiment, wireless communication technology is used for part of the transmission and reception of signals and data, but all of the transmission and reception of signals and data may be performed by wired communication.

[0087] Liquid injector 100 may further include a switch unit that is a remote controller so that the injection operation can be started and stopped even from inside the operation room.

[0088] 10A to 10G show an example of a switch unit that can be used in the present invention. The switch unit 300 shown in FIGS. 10A to 10G can be connected to the console 101 (see FIG. 1) via a cable 305. The switch unit 300 has a start button 301 that is operated to start injection and a stop button 303 that is operated to stop injection. A portion of the start button 301 is covered with a slide cover 302 to prevent erroneous operation. As shown in FIG. 10G, the slide cover 302 can be opened and closed by manually sliding it. It opens when the start button 301 is operated, but is otherwise closed. The switch unit 300 can have a display 304. The display 304 can display the injection status and injection time of the medicinal liquid. The switch unit 300 can be connected to the console 101 via a cable 305 as shown in the figure, or wirelessly.

[0089] Specifically, the syringe may be as shown in FIGS. 11(a) and (b), for example, for a 100 ml syringe. This syringe includes a cylinder member 501 and a piston member 502. A cylinder flange 501a formed at the end of the cylinder member 501 has an I-cut profile, and two notches 505 (only one of which is shown) are formed on the outer periphery of the flange 501a. The conduit portion 501b at the tip of the cylinder member 501 may be for a luer lock connection, having two coaxially arranged inner and outer cylindrical portions. As shown in FIG. 11(b), a ring-shaped protrusion 501c may be formed on the rear surface of the cylinder flange 501a.

[0090] Another example of a syringe may be a syringe as shown in FIGS. 12(a) and (b), which may be, for example, a 200 ml syringe. Like the syringe described above, this syringe also includes a cylinder member 501 and a piston member 502. A cylinder flange 501a formed at the end of the cylinder member 501 may have an I-cut profile. Two notches 505 (only one of which is shown) are formed on the outer periphery of the cylinder flange 501a. The conduit portion 501b at the tip of the cylinder member 501 may be for a luer lock connection, having two coaxially arranged inner and outer cylindrical portions. As shown in FIG. 12(b), a ring-shaped protrusion 501c and multiple ribs 501d extending outward from the protrusion 501c may be formed on the rear surface of the cylinder flange 501a.

[0091] 12 shows a cylinder flange 501a having both the notch 505 and the rib 501d formed therein, but it may have only one of them (for example, no notch 505 formed therein). Furthermore, the rib S501d may have a shape in which only the upper and lower two ribs of the multiple ribs aligned vertically in the drawing remain, and the other ribs are omitted. A syringe having such a group of ribs formed on only one of the left and right sides of the flange may also be used.

[0092] As shown in Figures 11 and 12, an adapter to which a syringe having a notch 505 in a cylinder flange 501a is attached preferably has a groove into which the cylinder flange 501a is inserted from above in the orientation shown in the figures, and a protrusion that engages with the notch 505 when the cylinder flange 501a is inserted and further rotated 90 degrees around the axis. This more securely holds the cylinder. Therefore, even if a malfunction occurs in the injection pressure control during an injection operation and excessive pressure acts on the syringe, the syringe is firmly held, making the cylinder flange 501a less likely to be damaged. Furthermore, uneven loads caused by attaching the syringe at an angle are less likely to occur, and liquid leakage due to gaps between the piston and the cylinder can be prevented.

[0093] The syringes shown in FIGS. 11 and 12 may also have an RFID tag on the outer circumferential surface of the cylinder, similar to the syringe 800 described above.

[0094] While the stand supporting injection head 110 in FIG. 1 is shown as being curved in a generally S-shape, any stand can be used, such as a straight stand 124 as shown in FIG. 13. Regardless of the type of stand used, power supply box 130 (see FIG. 1) may be secured to the stand. Because injection head 110 and power supply box 130 are always used together, securing power supply box 130 to the stand facilitates their easy movement between rooms. Injection head 110 can also be supported by an articulated support arm assembly secured to the ceiling.

[0095] The injection head 110 can also be configured to simultaneously accommodate two or more syringes 800. As an example, FIG. 14 shows an injection head 110 capable of simultaneously accommodating two syringes. The injection head 110 shown in FIG. 14 has piston drive mechanisms that can operate independently of each other. Each piston drive mechanism includes a presser 112 driven by a motor. By allowing two syringes to be simultaneously accommodating two syringes, various injection procedures can be realized, such as, for example, attaching one syringe filled with a contrast agent and another filled with saline to the injection head 110, injecting saline after the contrast agent is injected, and then boosting the contrast agent with saline, or diluting the contrast agent with saline to a desired concentration before injecting.

[0096] The speed control at the start of motor 162 described above is applicable not only to liquid medicine injection operations, but also to all operations involving the operation of motor 162. For example, prior to liquid medicine injection, a process known as "air removal" is generally performed to remove air bubbles from the syringe and the tubing connecting the syringe to the patient. In "air removal," motor 162 is operated with the syringe attached to the injection head, causing the piston to repeatedly move forward and backward. In this case, too, malfunctions due to inrush current can be prevented by controlling motor 162 to gradually increase its rotation speed as described above.

[0097] Furthermore, when stopping the motor 162, the head control circuit 158 ​​may gradually reduce the rotation speed of the motor 162, in contrast to the control performed when the motor 162 was started. This allows for more stable operation and reduces damage to the drive mechanism. In this case, the time required for the motor 162 to stop from its current speed can be one to two seconds. While this type of operation is applicable to all cases in which a rotating motor 162 needs to be stopped, a particularly effective operation is when the forward movement button 116c and the acceleration button 116d of the injection head 110 are simultaneously pressed to advance the presser 112 at maximum speed, and then the buttons 116c and 116d are simultaneously released to stop the presser 112.

[0098] The chemical solution injector may further include a load cell for detecting the injection pressure. The load cell may be provided, for example, in the presser 112. When multiple pressers 112 are provided as shown in FIG. 14, at least one of the pressers may be provided with a load cell. When a load cell is provided, the injection pressure is normally detected by the load cell, and the injection pressure can be measured using the measurement result of the motor current only when the load cell fails.

[0099] The fluoroscopic imaging device may be any device that can be used together with liquid injector 100, such as a CT device, an MRI device, a PET device, an angiography device, or an ultrasonic imaging diagnostic device.

[0100] As shown in FIG. 15 , in addition to the liquid injector 100 and the fluoroscopic imaging apparatus 200, the liquid injection system may further include a warmer 900 that warms a syringe 800 to a predetermined temperature before use and a disposal box 910 that stores used syringes 800 to be discarded. The warmer 900 and the disposal box 910 may be devices independent of the liquid injector 100 and the fluoroscopic imaging apparatus 200, or may be connected to at least one of them via a network so as to enable data communication. The warmer 900 and the disposal box 910 may also be independent of each other, or may be connected to each other via a network so as to enable data communication. The warmer 900 and the disposal box 910 may each include a reader / writer 902, 912, for reading information recorded on an RFID tag 802 and writing information to the RFID tag 802. Syringe 800 is heated by heater 900, and reader / writer 902 records information indicating that syringe 800 has been heated on RFID tag 802 of syringe 800. When used syringe 800 is stored in disposal box 910, information indicating that syringe 800 has been discarded is recorded on RFID tag 802 by 912.

[0101] The liquid medicine injection system may further include a liquid medicine filling device 920. The liquid medicine filling device 920 is a device that can mount an empty syringe that is not filled with a liquid medicine and fill the empty syringe with the liquid medicine. The liquid medicine filling device 920 may also be a device independent of the liquid medicine injector 100, the fluoroscopic imaging device 200, the heater 900, and the waste box 910, or may be connected to at least one of them via a network for data communication. A liquid medicine container 930 of any form, such as a bag or bottle containing the liquid medicine, is connected to the empty syringe via a tube or the like with the piston in the most forward position. After the empty syringe and the liquid medicine container 930 are connected, the empty syringe can be filled with the liquid medicine by retracting the piston using the liquid medicine filling device 920. The empty syringe preferably has an RFID tag attached thereto, which serves as a data carrier. In the following description, the empty syringe is assumed to be a syringe 800 with an RFID tag 802 attached thereto before being filled with a liquid medicine.

[0102] An RFID tag 932, which is a data carrier, is also attached to liquid medicine container 930. RFID tag 932 stores data related to the liquid medicine, such as the type of liquid medicine contained, the volume, the pharmaceutical manufacturer, the product number, the viscosity, the expiration date, and, if the liquid medicine is a contrast medium, the iodine concentration. Liquid medicine filling device 920 includes reader 922a that can read data from RFID tag 932 and writer 922b that can write data to RFID tag 802 attached to syringe 800.

[0103] In the above configuration, when liquid medicine filling device 920 is used to fill syringe 800 with liquid medicine from liquid medicine container 930, reader 922a reads data recorded on RFID tag 932 attached to liquid medicine container 930. Liquid medicine filling device 920 includes a storage device such as a memory, and the read data is temporarily stored in this storage device. Next, the operator sets the filling amount in liquid medicine filling device 920 and operates liquid medicine filling device 920.

[0104] As a result, a set amount of medicinal liquid is filled into syringe 800. The filling amount can be set according to a predetermined operating procedure of medicinal liquid filling device 920. After filling with the medicinal liquid, writer 922b writes the amount of medicinal liquid filled and the filling date and time to RFID tag 802 of syringe 800, along with the data temporarily stored in the storage device. As a result, syringe 800 is filled with the medicinal liquid, and data related to the filled medicinal liquid is recorded in RFID tag 802.

[0105] Note that data related to the syringe, as described above, may be pre-recorded in RFID tag 802. Reader 922a that reads data from RFID tag 932 of liquid medicine container 930 may also be a reader / writer that can write data. In this case, the current content volume (remaining amount) obtained by subtracting the filled amount from the content volume contained in liquid medicine container 930 before filling may be written to RFID tag 932. The remaining amount may be calculated by a CPU included in liquid medicine filling device 920.

[0106] Liquid injector 100 may have a built-in clock circuit that keeps track of the current date and time. In this case, RFID module 166 (see FIG. 5) reads the refilling date and time recorded in RFID tag 932, and head control circuit 158 ​​(see FIG. 5) compares the current date and time kept by the clock circuit with the read refilling date and time. If the current date and time are after a predetermined period of time has passed since the refilling date and time, i.e., the expiration date has passed, head control circuit 158 ​​performs processing to prevent the injection of the liquid. Examples of processing to prevent the injection of the liquid include disabling the operation of piston drive mechanism 161 (see FIG. 5), sending a signal indicating that the expiration date of the liquid has passed to console control circuit 152 (see FIG. 5), causing console control circuit 152 to display on touch panel 103 (see FIG. 5) that the expiration date of the liquid has passed, and issuing a sound or audio warning from a sounding device (not shown), such as a buzzer. The expiration date of the liquid medicine is preset in liquid injector 100, but the operator can change the expiration date at will. By managing the refill date and time of the liquid medicine in this way, the safety of the injected contrast medium can be ensured.

[0107] Each medical device constituting the liquid injection system, such as liquid injector 100, fluoroscopic imaging apparatus 200, warmer 900, waste box 910, and liquid filling device 920, may be connected to a medical network, which makes it possible to easily store and track the history of treatments given to subjects, the history of liquid use, the history of syringe use, and so on.

[0108] Furthermore, a liquid injection system including at least liquid injector 100 and imaging fluoroscopic apparatus 200 may be connected to a medical network. This allows the injection results, including an injection graph created using the injection rate, injection time, injection amount, and injection pressure calculated based on the measurement results of the motor current of the liquid injected by liquid injector 100, as well as the imaging conditions (imaging time, tube voltage if the imaging apparatus is a CT scanner, etc.) of imaging fluoroscopic apparatus 200 to be stored as injection data in a RIS, PACS, HIS, etc. via the medical network. This allows the stored injection data to be used for managing injection history, and the injection amount, in particular, can also be used for accounting purposes. Furthermore, the subject's physical information, such as weight, ID, name, examination site, and examination method can be obtained from a RIS, PACS, HIS, etc. and displayed on the liquid injector, allowing appropriate injections to be performed.

[0109] Furthermore, the amount of medicinal liquid filled by the medicinal liquid filling device 920 can be the amount of medicinal liquid to be injected into the subject. This allows the filled medicinal liquid to be used without waste. The injection amount can be calculated using a formula that takes into account factors such as the subject's physical characteristics, such as weight, the imaging site, and imaging time, or the value can be determined directly by a physician or other professional. The factors used to calculate the injection amount, or the injection amount value determined by a physician or other professional, can be entered by the operator or obtained from an external database, such as a RIS, HIS, PACS, external server, or cloud connected via a network or direct line. Obtaining the factors used to calculate the injection amount from an external database prevents input errors by the operator.

[0110] The calculation of the injection amount using the formula is executed by the console control circuit. The function of the console control circuit may be possessed by any computer device, such as the various control circuits included in the liquid injector, fluoroscopic imaging device, and liquid filling device. In other words, the injection amount of liquid may be calculated not by the liquid injector but by any other computer device. Furthermore, by possessing the function of the console control circuit in any other computer device rather than the liquid injector, an injection protocol using parameters such as the injection rate and injection time as well as the injection amount of liquid may be created by that computer device.

[0111] An example of the specific operation of the liquid medicine injector will be described below with reference to the block diagram of FIG. 5, using an injection head 110 capable of mounting two syringes as shown in FIG. 14 to inject contrast medium and saline as liquid medicine.

[0112] The touch panel 103 can display a screen for performing normal drug solution injection and a screen for injecting using other injection methods or for performing predetermined editing. These modes can be switched by operating a switch on the console 101 or an icon displayed on the touch panel 103.

[0113] First, the mode in which normal liquid medicine is injected will be described.

[0114] In the normal liquid injection mode, the operator first attaches a syringe filled with a contrast agent and a syringe filled with saline to injection head 110. Each syringe is equipped with an RFID tag 802. When the syringes are attached, information recorded on RFID tag 802 is read by RFID control circuit 164. The information read includes, for example, the amount of contrast agent, the iodine concentration, the product name of the contrast agent, and information regarding the pressure resistance of the syringe. Furthermore, information regarding the injection protocol is recorded on RFID tag 802, and it is also possible to read this information from RFID tag 802. Console control unit 152 may have a memory unit, and the information read from RFID tag 802 may be stored in this memory unit.

[0115] The amount of contrast medium is, for example, 100 ml, 150 ml, 200 ml, etc. The iodine concentration is, for example, 240 mgI / ml, 300 mgI / ml, 320 mgI / ml, 350 mgI / ml, 370 mgI / ml, etc. The pressure resistance of the syringe is, for example, 15 kgf / cm 2 And so on.

[0116] The numerical value relating to the "pressure resistance of the syringe" means a numerical value that may damage the syringe if injection is performed at a pressure exceeding that numerical value. This numerical value may be automatically read from the RFID tag 802 and set as the pressure resistance value of the piston drive mechanism 161, or a numerical value separate from the pressure resistance value may be set by input from the user. For example, if the numerical value read from the RFID tag 802 is 15 kg / cm 2 while the value entered by the user is 20 kg / cm 2 In the case of 2 It is preferable that the above is configured to have priority.

[0117] The read information is sent to the console control circuit 152 and displayed on the touch panel 103 as required.

[0118] (Regarding normal chemical injection mode) In the normal liquid injection mode, for example, an image of a human body facing sideways is displayed in the center of the screen of touch panel 103. This human body image may include multiple icons representing the head, chest, abdomen, and legs. The region to be imaged can be selected by touching the appropriate icon.

[0119] It is also possible to display other icons below the human body image, but these are not displayed on the initial screen, and only the human body image is displayed. The initial screen may be configured to display both the human body image and other icons, but if only the human body image is displayed, the items displayed on the screen will be simpler, allowing the user to operate more intuitively.

[0120] By touching one of the icons in the human body image (for example, an icon representing the abdomen), icons of the imaging region corresponding to the abdomen (here, "tumor," "liver," "kidney," and "blood vessels") are displayed. These icons can be displayed in a horizontal row below the human body image. Each icon displays only a picture representing an organ, and does not display text such as "tumor," "liver," "kidney," or "blood vessels." These texts may or may not be displayed, but icons with only pictures and no text display will simplify the display content. Note that the display of text may be switchable. The selected icon is preferably highlighted, making it possible to identify that this body part is currently selected.

[0121] Next, the imaging region is selected. For example, when an icon of the liver is touched, the image of the liver moves toward the abdomen of the human body image as if being sucked in, and is displayed within the abdomen.

[0122] When an imaging region is selected in this manner, the liquid injection time associated with this imaging region is read from the memory of the console control circuit 152 and displayed on the touch panel 103. For example, the injection time associated with the liver is 30 seconds, and an icon displaying "0:30 sec" can be displayed at the bottom of the screen.

[0123] Furthermore, multiple weight icons for selecting the subject's weight may be displayed on the touch panel 103. The multiple weight icons may be arranged in a horizontal row below the human body image. Weight may be divided into three categories, for example: a light weight icon representing less than 40 kg, a medium weight icon representing a weight of 40 kg to less than 70 kg, and a heavy weight icon representing 70 kg or more.

[0124] The number of weight categories may be changeable. The weight values ​​for each category may also be changeable. Furthermore, a numeric keypad may be displayed by performing a predetermined operation on the weight icon, allowing values ​​to be directly entered using this numeric keypad.

[0125] Furthermore, a scale icon displaying a picture of a scale and a syringe icon displaying a picture of a syringe may be displayed between the weight icon and the human body image. Touching the scale icon allows detailed weight input (details will be described later). Touching the syringe icon switches to a "flow rate mode" in which the injection speed can be selected as desired (details will be described later). The syringe icon may also be displayed on the initial screen.

[0126] Next, the operator touches one of the weight icons to input the subject's weight. The following describes the case where the medium weight icon (40 kg or more but less than 70 kg) is touched.

[0127] When the weight category is determined by touching the weight icon, the selected icon becomes highlighted. As an example of the display format, the injection time icon may move from the bottom of the screen to a position near the left of the weight scale icon and be displayed there.

[0128] 6 also displays information read from the IC tag 225. For example, the icon 173a displays the syringe pressure resistance of "15.0 kgf / cm 2 " is displayed. An icon 173b displays the amount of iodine per unit body weight required for imaging the liver as "540 mgI / kg." These icons 173a and 173b are displayed above the human body image 161.

[0129] Also, at this stage, injection volume icons displaying "A 100 ml" and "B 60 ml" may be displayed. This indicates that the injection volume of contrast medium is 100 ml and the injection volume of saline is 60 ml. Below these injection volume icons, an amount adjustment icon displaying "Amount Adjustment" may be displayed.

[0130] If the remaining amount of liquid medicine in the syringe (for example, 70 ml) is less than the set injection amount (for example, 76 ml), touching this amount adjustment icon 173d sets the remaining amount of liquid medicine as the injection amount.

[0131] Next, a procedure for determining the injection amount of contrast agent will be described. In this embodiment, the injection amount is calculated based on (i) the subject's weight, (ii) the iodine concentration of the contrast agent, and (iii) the amount of iodine required per unit weight corresponding to the imaging region. Specifically, the subject's weight is calculated as 55 kg, which is the intermediate value between 40 kg and 70 kg, as an example. The total amount of iodine to be injected into the patient is calculated based on this weight and the required amount of iodine, and the amount of contrast agent to be injected is then calculated based on this total amount of iodine and the iodine concentration of the contrast agent.

[0132] Although the representative weight for the 40kg to 70kg category is 55kg in this example, this value may be changed in the initial settings. Furthermore, the range of the weight category (for example, the 40kg to 70kg category) itself may also be changed in the initial settings.

[0133] In conventional liquid injectors, determining the amount of contrast agent taking the patient's weight into consideration usually requires the user to manually input, for example, weight information and contrast agent information, which is a cumbersome process. However, with this device, weight information can be input simply by touching a weight icon, and contrast agent information is also read from RFID tag 802, making it extremely simple.

[0134] Next, calculation of the injection rate of the contrast medium will be described.

[0135] In this embodiment, when the liver is selected as the imaging region, the injection time is determined to be "0:30 sec." The injection rate of the contrast agent is automatically calculated by dividing the amount of contrast agent to be injected calculated in the above step by this injection time.

[0136] The above-described series of steps determines the injection time (sec), injection volume (ml), and injection rate (ml / sec) of the contrast agent, and the injection conditions for the contrast agent are determined. Note that the injection conditions for saline can be determined by a known method, and therefore a detailed description thereof will be omitted here.

[0137] The thus determined injection conditions for the contrast agent and the physiological saline solution can be displayed as thumbnail images that schematically show an injection graph with the horizontal axis representing elapsed time and the vertical axis representing the injection rate. It is also possible to configure the system so that thumbnail images are displayed without inputting the weight and determining the injection rate. For example, when a region to be imaged is selected, a default weight category may be selected, the corresponding injection rate may be determined, and the corresponding thumbnail images may be automatically displayed.

[0138] The thumbnail image displays a graph with the elapsed time on the horizontal axis and the injection rate on the vertical axis. A condition image in the form of a horizontally long rectangular block representing the injection rate and injection amount of the medicinal liquid can be displayed within this graph. The condition image has a width corresponding to the injection time, for example, and is displayed at a height corresponding to the injection rate. The condition image displays the injection rate and injection amount as numerical values.

[0139] In conventional devices, when the injection conditions are set, information such as the injection time, injection rate, and injection amount is generally displayed simply as numerical values, making it difficult to intuitively confirm what injection conditions have been set. However, with the device of this embodiment, the injection conditions can be easily confirmed through thumbnail images.

[0140] It is also possible to display the set injection conditions as an injection graph using enlarged thumbnail images. However, in this case, there is no space to display the various icons (e.g., injection time icon, weight icon, human body image, etc.) used to set the injection conditions. In contrast, if thumbnail images are displayed, these icons and human body images can be displayed as they are, and if necessary, these icons can be easily used to make corrections.

[0141] The width and height of the condition image in the thumbnail image may or may not change depending on the set condition.

[0142] As an example, when a thumbnail image is touched, an enlarged version of the image may be displayed on the touch panel 103. In this enlarged image, for example, if saline is to be injected after a contrast agent is injected, an image of the contrast agent conditions followed by an image of the saline conditions may be displayed, and the syringe pressure resistance may be displayed in the upper right corner of the graph. In addition, up and down arrows may be displayed next to the image of the contrast agent conditions, and the injection conditions may be modified by manipulating these arrows. In a similar manner, the saline injection conditions may also be modified.

[0143] Instead of the above method, the injection rate may be changed by, for example, touching the condition image and moving the condition image up or down. Also, the numerical values ​​in the condition image may be changed by inputting values ​​using a numeric keypad. The condition image may be changed by pressing a predetermined "up" button or "down" button.

[0144] Once the injection conditions have been determined, a screen for confirming the final settings is displayed on the touch panel 103. In the center of this screen, an image is displayed that resembles a graph, with the horizontal axis representing elapsed time and the vertical axis representing the injection rate, and is an enlarged version of the thumbnail image described above. Above this image, a horizontally long window is displayed, displaying information such as the subject's weight, the amount of iodine required per weight, and the injection time. An injection volume icon is displayed to the right of the window, allowing the user to confirm the amounts of contrast agent (A) and saline (B).

[0145] The window may be configured to display other information, such as the selected weight category, the amount of iodine per body weight, or the amount of iodine per body weight and time.

[0146] After checking the injection conditions on the screen, the operator can start injecting the liquid medicine by, for example, pressing the "Check" button displayed on touch panel 103 or pressing check button 116a (see FIG. 3) on injection head 110. In this example, the liquid medicine is injected in the order of contrast medium and saline.

[0147] When the injection of the contrast agent begins, a pressure graph is displayed on the touch panel 103, with the horizontal axis representing elapsed time and the vertical axis representing injection pressure. This graph shows the injection pressure of the liquid medicine during injection in real time. As mentioned above, the injection pressure is calculated using the measurement results of the motor current.

[0148] Regarding the pressure graph, not only the detected real-time pressure of the medicinal liquid may be depicted within the graph, but also the ideal pattern (which may be displayed as a single line or as a band with a certain width) that would be obtained if injection were performed under those injection conditions.

[0149] The scale icon and syringe icon described above are used to switch between modes for setting injection conditions. When the scale icon is selected, settings are made in "weight input mode" (the above-described series of setting procedures). In this embodiment, this mode is the default. When the syringe icon is selected, settings can be made in "flow rate mode." In weight input mode, the injection time (e.g., 0:30 sec) takes priority, and the injection rate is calculated based on that. In contrast, in flow rate mode, any injection rate can be set, such as 1.5 ml / sec or 2.0 ml / sec. This mode is used, for example, when injection rate is an important factor in contrast imaging.

[0150] The above series of operations basically includes the following steps: (a) displaying images of multiple imaging regions on a display device; (b) when one of the imaging regions is selected, a process of reading out the injection time corresponding to the imaging region; (c) determining the amount of contrast agent to be injected into the subject; (d) determining an injection rate of the contrast agent based on the determined amount of the contrast agent and the injection time; (e) displaying a graph of the injection conditions, which shows the relationship between the injection time and the injection rate, on the display device as a thumbnail image; (f) Thereafter, when a predetermined icon on the display device and / or a predetermined button on the injection head is pressed, a process of making the device ready for injection according to the injection conditions. Each of these processes can be executed by the console control circuit 152.

[0151] According to the above-described series of processes, when an injection condition is set, the condition is displayed as a thumbnail image on touch panel 103. Therefore, the operator can check the setting contents through this thumbnail image. Furthermore, since this image is displayed as a relatively small thumbnail image rather than a large image, other icons for setting the injection condition can be displayed in their original positions, and these icons can be used to easily make corrections.

[0152] Furthermore, with the liquid injector of this embodiment, injection conditions can be set basically through the following simple steps: (i) inserting the syringe into the injection head, (ii) selecting the imaging region, and (iii) selecting the patient's weight. To achieve such simple settings, it is preferable that the injection time of the contrast agent (e.g., "0:30 seconds") be determined when the imaging region is selected. Furthermore, to avoid the need to manually input information about the contrast agent, it is preferable that information about the iodine concentration of the contrast agent, the amount of the contrast agent, and so on be automatically read from syringe RFID tag 802.

[0153] The patient's weight may be entered by inputting a specific numerical value using the numeric keypad, but if the patient's weight is entered by selecting one of multiple weight icons as in this embodiment, the operation is simpler.

[0154] Furthermore, in the device of this embodiment, the injection time of the contrast agent is determined by the selected imaging region (0:30 seconds in the above example), and in principle, this time is constant regardless of the weight of the subject. With this configuration, even when multiple diagnoses are performed on one subject (the imaging region is the same) or when diagnoses are performed on multiple subjects (the imaging region is the same), the injection time is the same, so there is no need to adjust the timing of the scan start of the CT device, etc.

[0155] The present invention is not limited to the above, but may be as follows.

[0156] For example, to accommodate syringes that do not have an RFID tag 802, a "product name" icon can be displayed on the touch panel 103, and by touching this icon, a pull-down list can be displayed. By selecting one product from the list, information such as the product name and its iodine content can be entered.

[0157] In the device of this embodiment, a predetermined injection time (e.g., 30 seconds, 45 seconds, 60 seconds, etc.) is registered for each imaging site (e.g., tumor, liver, kidney, blood vessel, etc.). Such data may be stored in a storage unit of the console control circuit 152, or may be stored in an external device and read into the console control circuit 152 via a network.

[0158] Alternatively, a device for measuring the subject's weight or a device having the subject's weight information may be connected to console 101, and the patient's weight category may be automatically selected by inputting the weight information from that device. This makes it possible to omit the step of selecting the weight.

[0159] Regarding the weight icon, two or four or more icons may be displayed. Also, instead of selecting a weight category, a default weight value (e.g., 60 kg) may be automatically selected.

[0160] The procedure for starting liquid injection may be such that, without displaying the enlarged condition image simulating a graph as described above, the injection can be started by pressing a predetermined button (an icon on the screen and / or a button on the injection head) while viewing a thumbnail image. For example, while a thumbnail image is displayed on the screen, operating the check button on touch panel 103 or check button 116a on injection head 110 changes the display of the check button on the screen to "Start OK," allowing the injection to begin.

[0161] Although the above description has been given of a human body image in landscape orientation as an example, the present invention is not limited to this and may also be applied to a human body image in portrait orientation. The number of body parts included in the human body image is not limited to four, but may be three or less, or five or more.

[0162] Next, an example of an image displayed on the touch panel 103 will be described.

[0163] (Mode for selecting other injection methods, editing, etc.) Here, we will describe a contrast agent injector that can accommodate various injection methods by allowing the injection mode and condition setting method (hereinafter simply referred to as "injection mode, etc.") to be easily set or changed on console 101. We will also describe a contrast agent injector that allows the injection mode, etc. to be set according to the preferences of each physician, even when there are multiple physicians using the injector.

[0164] A home screen can be displayed on the touch panel 103. The home screen can be displayed, for example, by operating a home button 102b (see FIG. 2) provided on the console 101. Note that the home screen may be displayed by pressing a predetermined icon or the like on the touch panel 103, or may be displayed automatically after a predetermined time (idle time) has elapsed.

[0165] On the home screen, multiple icons are arranged in a matrix (for example, 3 rows and 4 columns). In this example, each icon is approximately square with rounded corners, but the icon itself may be shaped in other ways, such as rectangular, polygonal, or circular. There is no particular limit to the number of icons displayed on the home screen, but if there are too many icons, it may be difficult for the user to operate intuitively. Therefore, it is preferable to have 3 to 5 rows and 3 to 6 columns (i.e., a 3 x 3 matrix to a 5 x 6 matrix) of icons, as this allows sufficient information to be displayed without impairing operability.

[0166] For example, the top row of the home screen displays four horizontal icons: one for Pediatric Mode, one for Emergency Mode, one for Plot Infusion Mode, and one for Test Bolus Tracking (TBT) Infusion Mode.

[0167] In the middle of the home screen, four icons are displayed for selecting Doctor 1 to Doctor 4 who will use this contrast medium injection device. The number of icons is not particularly limited, and for example, only one, two, or three icons may be displayed.

[0168] The bottom row of the home screen displays multiple icons for performing various functions of the liquid injector, such as an icon for displaying the results of liquid injection, an icon for setting protocols, an icon for configuring various environmental settings, and an icon for editing users (doctors, etc.).

[0169] It is preferable that the arrangement of icons on the home screen be configured so that they can be changed as needed. Basically, the arrangement of icons can be freely changed, and each icon can be displayed or hidden. However, certain icons may be configured to be always displayed on the screen (i.e., cannot be hidden). For example, by configuring the icon for emergency mode to always be displayed, it will be possible to respond appropriately to the injection of medical fluids in an emergency.

[0170] Next, the function of each icon will be explained. First, the "Emergency Mode" will be explained, followed by the "Child Mode" and other modes.

[0171] (Emergency mode) The "emergency mode" allows another doctor to inject contrast medium even when a specialist doctor is absent, for example, during nighttime medical treatment. When the emergency mode icon is selected on the home screen, the emergency mode is initiated, and after a predetermined operation (details below) the emergency mode screen is displayed on the touch panel 103.

[0172] On this screen, a status bar is displayed at the top of the screen, and this status bar displays ER, which indicates that emergency mode is currently selected, as well as several other icons.

[0173] Examples of "other icons" include a "route" icon for performing an operation to confirm that the route to the patient is properly secured when injecting a medicinal solution, and an icon for performing a conventionally known "timing test." Furthermore, the product name and / or an identification mark of the manufacturer of the medicinal solution in the syringe may be displayed on the status bar. A start button is displayed on the right side of the status bar.

[0174] A large window is displayed in the center of the screen, and within this window are displayed images of injection conditions for emergency mode and guidance images for guiding the user through operations.

[0175] The injection condition image is a graph with the injection rate of the liquid medicine on the vertical axis and the injection time on the horizontal axis, and a condition bar image is displayed within the graph. Since it is important to be able to quickly set the injection conditions in emergency mode, the condition bar image displays the injection conditions of the pre-set injection rate and injection time (for example, a rate of 1.0 ml / sec and a volume of 100 ml). Note that these injection conditions may or may not be changeable by the user.

[0176] The guidance image provides the user with information to guide them as to what operations to perform on injection head 110 and / or console 101. For example, information to operate the operating device (switch unit 300 shown in FIGS. 10A to 10G) on console 101 is displayed as an image.

[0177] The emergency mode screen may include a button with an "i" mark. A guidance image may be displayed by operating this button. In another embodiment, the guidance image may be displayed automatically after a predetermined time has elapsed, even if the "i" button is not operated.

[0178] On the emergency mode screen, a horizontal information display bar is displayed between the window in the center of the screen and the status bar at the top of the screen, and displays, for example, the patient's body image and the drug injection time. For example, the patient's body image may consist of multiple body parts, and a selected body part (details below) may be highlighted. This allows the user to know which body part is currently selected.

[0179] To the right of the horizontal information display bar is a liquid volume display that shows the amount of liquid in the syringe. For example, if the syringe contains 150 ml of contrast medium, the liquid volume display will show "150 ml."

[0180] After checking the injection conditions and other information on the emergency mode screen, pressing the start button on the screen or the operation device (not shown) on console 101 changes the screen display. In the changed screen, the text inside the start button changes to "check," and the instructions in the guidance image also change. Specifically, an image is displayed instructing the user to press check button 116a on injection head 110 (see FIG. 2). Next, pressing check button 116a or the start button on the screen starts liquid injection in emergency mode.

[0181] According to the configuration of this embodiment, the operator (1) selects emergency mode on the home screen, (2) then confirms the injection conditions and then inputs "Start OK" on the screen or on the console, and (3) then presses a specified button (one example) on the injection head to safely and quickly start injection in emergency mode.

[0182] When the emergency mode is performed, a selection screen showing multiple preset injection conditions may be displayed first, allowing the user to select one of the multiple candidate injection conditions. Examples of the preset injection conditions include "Head CTA," "Chest / Abdominal CTA," "Abdominal Acute Abdomen (Condition 1)," "Abdominal Acute Abdomen (Condition 2)," and "Abdominal Acute Abdomen (Condition 3)," and each of these conditions displays the imaging site, injection rate, and injection amount. This configuration enables optimal contrast agent injection, taking into account the site and patient characteristics, even in the emergency mode. When one of the multiple candidate injection conditions is selected, the emergency mode screen described above is displayed, for example.

[0183] In addition to the above example, the following image display configuration may also be used. That is, when emergency mode is selected on the same home screen as above, a selection screen for preset injection conditions is displayed. Selecting one of the injection condition candidates on the selection screen displays the emergency mode screen described above. Then, pressing the check button on the emergency mode screen or the check button on the injection head changes the icon displayed on the screen from "Check" to "Start OK." Next, pressing the start button on the injection head or the switch on the switch unit starts the injection. In this way, the screen display format can be changed as needed.

[0184] (Child mode) When the child mode icon is selected on the home screen, the child mode is initiated and a child mode screen is displayed on the touch panel 103. On the child mode screen, a vertically oriented human body image (as an example) representing a child is displayed on the left side. This human body image includes icons of multiple selectable body parts (for example, head, chest, abdomen, legs, etc.). The selected part can be highlighted.

[0185] Predetermined injection conditions are displayed on the thumbnail screen according to the selected body part. For example, the thumbnail screen displays an injection condition in which 20 ml of contrast medium is injected at 1.5 ml / sec, followed by 10 ml of saline at 1.5 ml / sec. The center of the pediatric mode screen may also display a weight display for setting the child's weight and an injection time display for displaying the injection time.

[0186] According to the configuration of this embodiment as described above, it is possible to set suitable injection conditions for each subject, not only for adults but also for children. In the pediatric mode, multiple preset injection condition candidates as described in the emergency mode may also be displayed. However, since setting detailed injection conditions for children may not be necessary compared to adult patients, such a function may be omitted, allowing for quicker and easier setting.

[0187] The pediatric body image is not limited to being displayed vertically, but may be displayed horizontally. The pediatric mode may be initiated, for example, when an adapter for a small syringe (e.g., 20 ml) is attached to the injection head. Specifically, the display may be configured to automatically switch to the pediatric body image when the adapter is attached.

[0188] (Other injection modes) Selecting the plot injection icon or test bolus tracking injection icon on the home screen starts the plot injection mode or test bolus tracking injection mode. These injection modes are well known and will not be described in detail here. However, the configuration of this embodiment allows users to intuitively select various injection modes from the home screen, reducing the time and effort required when setting injection conditions.

[0189] The content of the icons displayed on the home screen does not limit the present invention in any way. In other words, it is preferable that icons for other condition setting methods (such as a weight input mode, a lean body mass mode, a body surface area mode, and a blood volume mode) can be displayed on the home screen according to the user's preferences.

[0190] These injection mode / condition setting methods can be conventionally known, but for example, a lean body mass mode screen may be displayed for the lean body mass mode. This screen preferably displays the subject's weight, height, drug solution information, injection conditions, and an icon for selecting whether the subject is male or female. The lean body mass mode screen also displays "LBW" in the window, indicating that the lean body mass mode is currently selected, and the iodine amount per body weight (540 mg / kg).

[0191] In each injection mode, a predetermined warning may be issued to the user as is conventionally known. For example, a warning may be issued when the set injection rate, injection volume, or injection pressure exceeds or falls below a predetermined reference value. In this case, in addition to issuing a warning, the device may also be configured to forcibly stop the target operation.

[0192] (Doctor selection icon) The physician selection icon displayed on the home screen may indicate which physician is selected with a check mark. If no physician selection has been made, the default may be to check physician 1.

[0193] Each doctor can set injection conditions according to his / her preferences in advance. For example, in the imaging region selection mode, the doctor can set in detail the type of imaging region to be displayed when each body part is selected, (ii) the injection time and injection speed, and (iii) the injection pattern to be used.

[0194] With this configuration, a doctor can use a condition setting mode according to his or her preferences.

[0195] It should be noted that the system may be configured so that other items (e.g., what icons to display on the home screen, how to arrange the icons, etc.) can be freely changed according to the preferences of each doctor. For example, the arrangement of icons on the home screen may be changed as desired.

[0196] On the other hand, an icon that cannot be deleted from the home screen may be set. For example, if the emergency mode is considered relatively important in every hospital, the emergency mode icon may be always displayed on the home screen as described above, and only the other icons may be changed to preferred icons.

[0197] (icons for performing various functions, etc.) The home screen may include a "Protocol Settings" icon. The "Protocol Settings" icon is used to set a new injection protocol or change an existing injection protocol. While there are no particular limitations on the injection protocol, it is preferable to be able to set various methods, such as a protocol called a variable injection, in which the injection rate of the drug solution changes over time, or a protocol in which a contrast agent is injected followed by saline.

[0198] In the "Protocol Setting" mode, guidance may be displayed to facilitate the registration or modification of an injection protocol. As an example, a setting screen may be used in which several items to be set as an injection protocol are displayed side by side, and registration or modification is completed by inputting specific numerical ranges for each item. The items may be arranged vertically or horizontally.

[0199] The home screen may also include a "Preferences" icon for configuring various settings, such as date and time settings, volume settings, settings for linking with other medical devices, and leak detection settings.

[0200] The home screen may also include an "Edit User" icon, which allows for registering new physician settings or modifying existing settings.

[0201] The home screen may also include an "Injection Results" icon. The "Injection Results" icon is used to display the results of the liquid medicine, and may, for example, display an injection graph for a single liquid medicine injection, or may display a list of data for multiple past liquid medicine injections (e.g., date and time, injection pattern, injection rate, injection amount, injection pressure, contrast agent product name, etc.). For example, a graph of the liquid medicine injection results (e.g., including information on what pressure the liquid medicine was injected at and for how long) may be output externally and displayed together with a diagnostic image captured by an imaging device.

[0202] The touch panel 103 may display various screens such as the following. For example, this is an image showing the state in which the console 101 is connected to the imaging device 200. In this case, a predetermined injection protocol may be read from the imaging device 200, and the injection protocol may be set as the injection condition. For example, a message window on the screen may display a message such as "Protocol set from scanner."

[0203] In the contrast agent injection device of this embodiment, the region screen registered as the default may be displayed first, and the home screen may be displayed by pressing, for example, a home button (a hard key on the console).Instead of pressing the home button, a timer may be set so that the home screen is automatically displayed after a predetermined time.

[0204] Further functions of the injection device (Self-check) The chemical liquid injector may be configured to perform the following operations.

[0205] A liquid injector according to one embodiment of the present invention may automatically perform a series of operations known as a "self-check" when the main power supply (e.g., power button 102c on console 101) is turned on. The "self-check" operates the piston drive mechanism of injection head 110, as well as certain switches or sensors, to check whether they are operating normally. For example, in the case of a piston drive mechanism, the motor that drives it is actually rotated to check whether it is operating normally. In this case, the motor rotation amount may be very small; for example, the check may be performed using an amount of rotation less than that used during liquid injection (for the main injection for contrast imaging or a predetermined pre-injection before the main injection).

[0206] In the case of switches, sensors, etc., checks are made to, for example, check the energization state of those components, or check whether the output value is within a predetermined range, etc. Also, a check may be made to see whether the connections between devices are normal.

[0207] The results of the self-check may be configured to be displayed sequentially on the display, and for example, items such as "speed," "amount," "pressure," "STOP," "switch," and "connection" may be checked sequentially.

[0208] With this configuration, a self-check at the time of startup of the injection device allows confirmation that each function of the injection device is normal before use of the injection device can be started, thereby preventing problems caused by injection device malfunctions or poor connections.

[0209] (Protocol setting guidance function) In the emergency mode described above, it has been described that a predetermined guidance image is displayed by pressing the "i" button, but such a guidance image may be configured to be displayed, for example, during the procedure of setting an injection protocol (i.e., injection conditions). For example, when input of several items is required to set an injection protocol, after input of one item is completed, a guidance display may be displayed indicating, for example, what the next input item is. Such a guidance display may be displayed automatically, or may be displayed when a predetermined input is made by the user.

[0210] (TBT mode) Conventionally, the use of methods such as a test injection method or a bolus tracking method has been proposed to determine the imaging timing of an imaging device. Details of the bolus tracking method are described, for example, in WO2011 / 136218, previously filed by the present applicant, and therefore will not be described in detail here. The outline is as follows: In the bolus tracking method, an increase in the CT value of a predetermined region of interest is monitored by the imaging device while a contrast agent is being injected. When the CT value reaches a predetermined value, the actual scan is initiated after a predetermined delay. As described above, the injection device of this embodiment is configured to display an icon for the test bolus tracking injection mode on the home screen, and to enter the test bolus tracking mode by touching this icon.

[0211] In a bolus tracking test, as described in WO2011 / 136218, the patient holds their breath during a delay period after the first injection of contrast agent to stabilize their heart rate. Regarding this series of injections, for example, a console touch panel may be configured to display the saline and contrast agent injection conditions and a bolus tracking timeline window. The timeline window may have an interval (delay time) section, where text information such as "delay," "breath hold," and "heart rate stable" may be displayed. Each of these may display the corresponding number of seconds (here, all 5 seconds).

[0212] When infusion of a drug solution has begun, the current infusion status may be displayed. In particular, a status bar at the top of the screen may display multiple indicators to indicate which process is currently being performed. A first indicator indicates that a "test bolus" infusion is in progress, a second indicator indicates that an interval is in progress, and a third indicator indicates that a "bolus" infusion is in progress. The indicator may be highlighted to indicate the operation currently being performed.

[0213] (Exporting data to external storage media) In one embodiment of the injection device of the present invention, after the injection is completed, information on the injection results may be written to an external storage medium. This storage medium may be a memory medium inserted into a predetermined slot (not shown) of the console. The information written is not particularly limited and may be any information related to the injection results. Data may be written in CSV format so that the injection results can be easily accessed on other personal computers, etc. However, the data format is not limited to this and various formats can be used. The injection results may be written not only to a storage medium such as a memory, but also, for example, sent via a network to a predetermined system (e.g., a hospital management system) and stored in its internal storage device.

[0214] (Information displayed on the head display) The present invention may further include the following functions. For example, a sub-display (also referred to as a head display) separate from touch panel 103 of console 101 may be provided. The sub-display may be integrated with the injection head or attached to a mechanism supporting the injection head (e.g., a stand or a ceiling-mounted articulated arm). The sub-display may display, for example, a pressure graph during injection. Specifically, the console and head may be synchronized to display a pressure graph in real time on at least one of the main display and the sub-display. For example, a pressure graph may be displayed on the sub-display while "route confirmation" is being performed. "Route confirmation" is primarily intended to confirm whether the drug solution route is properly secured (e.g., whether the injection needle is inserted properly, whether the tubing is kinked, etc.). Therefore, being able to view the pressure graph during such route confirmation on a sub-display near the subject is advantageous because it facilitates the task of detecting abnormalities in the injection needle insertion and correcting kinks.

[0215] The injection rate for route confirmation may be automatically set to the same as the injection rate for the main injection. Alternatively, the injection rate for route confirmation may be set separately from the injection rate for the main injection.

[0216] (preset injection protocols) The injection protocol can also be preset. Presetting the injection protocol can simplify the procedure for setting the injection protocol. When presetting the injection protocol, it is possible to pre-set only one injection protocol, but it is preferable to pre-set multiple injection protocols and allow the operator to select one injection protocol from among them.

[0217] 16A to 16C, an example of a screen display on a touch panel when multiple injection protocols can be preset will be described.

[0218] 16A to 16C are display examples when icons with preset numbers 1 to 3 are selected, respectively. The preset numbers can be selected, for example, by touching the icons displayed on the screen. The selected icons are displayed in a different color from the other icons, making them visually distinguishable from unselected icons.

[0219] When a preset number is selected, the corresponding injection graph, the amount of medicinal liquid filled in the syringe, the pressure limit, etc. are displayed. The injection graph may be a schematic graph in which the injection rate and injection amount are numerically indicated, as shown in the figure. In the example shown, the injection graph is an injection graph in which the vertical axis represents the injection rate and the horizontal axis represents time. It is preferable that the vertical and horizontal axes of the injection graph are appropriately scaled. After checking the injection graph, etc., if the selected injection protocol is acceptable, the operator can confirm the selected injection protocol by performing additional operations such as further touching the selected icon or touching the "check" icon displayed on the screen.

[0220] In order to allow the operator to grasp the outline of the injection protocol corresponding to the preset number without displaying the injection graph, a dot can be displayed below the icon indicating the preset number. In the illustrated example, the dots displayed below the injection icon indicate the number of phases and whether or not there is an interval. That is, the number of dots indicates the number of injection phases. In addition, in the case of an injection protocol having multiple injection phases, a narrow spacing between the dots indicates consecutive phases, and a wide spacing between the dots indicates phases separated by an interval. Furthermore, an icon without a dot indicates that the injection protocol is not preset. The above is an example of a display, and any display is possible.

[0221] (Example of injection pressure display for a two-cylinder type) For example, in a liquid injection device that can simultaneously mount two or more syringes and inject the liquid medicines in the mounted syringes individually or simultaneously, as shown in FIG. 14, when liquid medicines are injected simultaneously from multiple syringes, it is preferable to display injection pressure graphs for all liquid medicines on a display device (for example, a touch panel of the console and / or another display, if one is available). However, there are cases where only one injection pressure graph can be displayed due to limitations on the display area of ​​the injection pressure graph on the screen. In such cases, the concept of display when the injection pressure reaches the limit pressure and the motor is temporarily stopped will be explained using an example where liquid medicines are injected by the operation of the first and second piston drive mechanisms.

[0222] First, while the injection operation is being performed normally, an injection pressure graph for either the first or second piston drive mechanism can be displayed. The injection pressure graph to be displayed may be that for a specific piston drive mechanism that has been preset, or may be arbitrarily set by the operator. For example, the injection pressure graph for the higher injection pressure may be displayed, or the injection pressure graph for the lower injection pressure may be displayed. In this case, it is preferable to display the injection pressure graph for the higher injection pressure. Alternatively, the average value of both injection pressures may be calculated, and a graph of the resulting average injection pressure may be displayed.

[0223] When the injection pressure of the drug solution by either the first or second piston drive mechanism reaches a limit pressure and the drive of the motor of that piston drive mechanism is stopped, either the injection pressure graph for the stopped piston drive mechanism or the injection pressure graph for the piston drive mechanism operating normally may be displayed. However, it is preferable to display the injection pressure graph for the stopped piston drive mechanism to notify the operator that an abnormality has occurred. In other words, if the injection pressure graph displayed before the stoppage was the injection pressure graph for the stopped piston drive mechanism, the injection pressure graph continues to be displayed; otherwise, the display is switched to the injection pressure graph for the stopped piston drive mechanism.

[0224] The injection pressure measured based on the motor current from the start of injection can be stored in memory (e.g., RAM of the head control circuit 158), and when a graph of the injection pressure caused by a stopped piston drive mechanism is displayed, the stored injection pressure from the start of injection can be displayed so that the operator can recognize the progress of the pressure increase.

[0225] Similarly, when both the first and second piston drive mechanisms stop, the injection pressure from either piston drive mechanism may be displayed. The operator can also switch the piston drive mechanism for which the injection pressure graph is displayed. Here, when both piston drive mechanisms stop, this includes when both stop simultaneously and when one stops while the other stops, resulting in both stopping.

[0226] As described above, the injection pressure graph to be displayed may be that of either piston drive mechanism, but if contrast medium is injected as the medicinal liquid using one piston drive mechanism and saline is injected using the other piston drive mechanism, it is preferable to display the injection pressure of the piston drive mechanism that injects the contrast medium first.

[0227] (Use as a filling device) The liquid injection device can also function as a liquid filling device by mounting an empty syringe that is not filled with liquid medicine and whose piston is in the most forward position, and before or after that, fluidly connecting the empty syringe to an external liquid medicine container (which can be in any form such as a bag or a bottle) containing the liquid medicine via a tube or the like, and operating the piston drive mechanism in this state to move the piston back. The empty syringe can have the same configuration as the syringe described using Figures 11 and 12.

[0228] When the liquid medicine injector is used as a liquid medicine filling device, presser 112 (see FIG. 3) is provided with a piston flange holding structure such as multiple claws that not only presses the piston of the syringe but also holds and retracts the piston flange, thereby allowing the piston to be retracted by retracting presser 112 through the operation of the piston drive mechanism.

[0229] The retraction of presser 112 can be performed, for example, by the operator operating retraction button 116e (see Figure 3) provided on injection head 110, allowing the operator to fill the syringe with any amount of medicinal liquid.

[0230] Alternatively, an icon for "filling mode" can be added to the home screen described above, and the mode can be switched to filling mode by touching (selecting) this icon. In filling mode, the filling amount is set, and the operation of the piston drive mechanism is controlled so that the set amount of medicinal liquid is filled into the syringe. Setting of the filling amount in filling mode, setting of the display screen on touch panel 103, and operation control of piston drive mechanism 161 (see FIG. 5) as described below can be implemented as computer programs executed by console control circuit 152 (see FIG. 5) and head control circuit 158 ​​(see FIG. 5).

[0231] An example of the process after the transition to the filling mode will be described below.

[0232] In the filling mode, at least the filling volume only needs to be set, and an appropriate filling speed that does not interfere with the operation of the piston drive mechanism can be preset. The volume of medicinal liquid to be filled can be calculated from the inner diameter of the attached syringe and the retraction distance of the presser 112. Therefore, when the inner diameter or model number of the syringe (the inner diameter of the syringe can be identified from the model number) and the filling volume are input from an input device such as the touch panel 103, the console control circuit 152 calculates the retraction distance of the presser 112 based on these and transmits the calculated data to the head control circuit 158. The head control circuit 158 ​​drives the piston drive mechanism 161 based on the data transmitted from the console control circuit 152. As a result, the syringe is filled with the input volume of medicinal liquid.

[0233] The empty syringe to be filled with the medicinal liquid is preferably equipped with the above-mentioned RFID tag 802. Various data related to the syringe, including the inner diameter of the syringe, is recorded on the RFID tag 802, and the RFID module 166 acquires the data recorded on the RFID tag and transmits it to the console control circuit 152, thereby eliminating the need for the operator to input the inner diameter of the syringe.

[0234] Furthermore, after the medicinal liquid has been filled, information about the filled medicinal liquid, such as the amount, type, pharmaceutical manufacturer, product number, viscosity, and if the medicinal liquid is a contrast medium, the iodine content, expiration date, and filling date and time, can be written to RFID tag 802 by RFID module 166. If an RFID tag similar to RFID tag 802 attached to the syringe is also attached to the medicinal liquid container that contains the medicinal liquid to be filled, and information about the medicinal liquid excluding the filling amount is recorded on this RFID tag, this information can be used as the information to be written to RFID tag 802 of the syringe. To use the information written on the RFID tag attached to the liquid container as information to be written to RFID tag 802 attached to the syringe, an RFID module (RFID reader) separate from RFID module 166 provided in injection head 110 can be connected to injection head 110, and the RFID module can be used to read information from the RFID tag attached to the liquid container, temporarily store the read information in head control circuit 158, and write the stored information to RFID tag 802 by RFID module 166. This information can be written simultaneously with or separately from the writing of information about the fill amount and fill date and time.

[0235] The amount of medicinal liquid filled can be arbitrarily set by the operator according to, for example, the capacity of the syringe, but it is more preferable to set it to the same amount as the amount to be injected into the subject, since this allows the medicinal liquid to be used without waste. When the amount of medicinal liquid filled is set to the same amount as the amount to be injected into the subject, the injection amount can be calculated by the console control circuit 152 based on the subject's weight, the imaging site, information about the medicinal liquid obtained from the RFID tag attached to the medicinal liquid container, and the like, for example, according to the procedure described above, and this can be set in the console control circuit 152 as the filling amount.

[0236] In this way, by writing information about the filled medicinal liquid to RFID tag 802, even if the syringe filled with the medicinal liquid is not used immediately but is removed from injection head 110 and temporarily stored, the necessary information is written to RFID tag 802, so it can be handled in the same way as a prefilled syringe with an RFID tag.

[0237] During filling of the medicinal liquid, it is preferable to display the filling status of the medicinal liquid on touch panel 103 so that the operator can visually recognize that filling is in progress. The display screen in this case may include, for example, an animated image showing the state in which the medicinal liquid is being filled into the syringe, an image in which a numerical value indicating the amount of medicinal liquid filled increases moment by moment in response to the operation of piston drive mechanism 161, or an image combining these.

[0238] Furthermore, to detect the presence of air bubbles in the syringe during filling with the drug solution, it is preferable to dispose an air bubble detection sensor in the tube connecting the drug solution container and the syringe. Any type of detection sensor, such as an optical, ultrasonic, or capacitance type, can be used as the air bubble detection sensor, as long as it can detect the presence or absence of air bubbles in the tube. All of these types detect the presence or absence of air bubbles in the tube by detecting changes in characteristics between the presence and absence of air bubbles in the tube, such as changes in optical properties such as refractive index, reflectance, and transmittance in the case of optical types, changes in resonance properties in the case of ultrasonic types, and changes in capacitance in the case of capacitance types.

[0239] (Data carrier) In the above-described embodiment, an example was shown in which the data carrier was an RFID tag on a syringe or a liquid medicine container, but in the present invention, various types of data carriers can be used in addition to RFID tags, such as bar codes and two-dimensional codes. Of course, when a data carrier other than an RFID tag is used, a reader compatible with that data carrier is used.

[0240] However, because barcodes and two-dimensional codes do not allow data to be added or rewritten, their use as data carriers is limited to applications that do not require data addition or rewriting. Furthermore, because barcodes have a small data capacity, they can be used as identification codes to distinguish individual syringes, etc., rather than recording the data itself. Various data on medicinal liquids, etc., can be stored in a database inside or outside the medicinal liquid injection system, corresponding to each syringe, etc., and when the identification code is read by a reader, the various data corresponding to that identification code can be retrieved from the database.

[0241] (Example of the screen displayed when a syringe with a data carrier is detected as being installed) The reader (reader / writer) provided on the injection head is mounted in a position where it can automatically read out the data recorded on the data carrier when a syringe with a data carrier attached is mounted on the injection head.

[0242] Therefore, when a syringe with a data carrier is mounted on the injection head and the reader is activated to read the data recorded on the data carrier, the head control circuit sends a data carrier detection start signal to the console control circuit, which indicates that the reader has started detecting data from the data carrier, and the console control circuit can also display an image of the data carrier being detected on the console or other display device.

[0243] As an example, Figure 17 shows a data carrier detection screen when the data carrier is an RFID tag. In the example shown in Figure 17, an image of a syringe is displayed in the center of the screen as the data carrier detection image, along with a mark designed to resemble an RFID tag. It is preferable that a sticker bearing the same mark as this mark is also affixed to the syringe, or that the same mark as this mark is printed on the syringe, so that the user can see at a glance that the RFID-equipped syringe is mounted on the injection head and that data is being read. As shown in Figure 17, the image of the syringe can be displayed overlapping the originally displayed image.

[0244] Alternatively, the console control circuit may read data from the data carrier and then cause information about at least a portion of the read data to be displayed on a console or other display device based on data transmitted from the head control circuit.

[0245] FIG. 18 shows an example of the display screen after data has been read. In the example shown in FIG. 18, a syringe information image including information indicating the type of medicinal liquid, an image of a syringe, and the amount of medicinal liquid contained in the syringe is displayed in the center of the screen. As shown in FIG. 18, these can be displayed overlapping the image originally displayed. The information indicating the medicinal liquid may be at least one of the medicinal liquid manufacturer, the type of medicinal liquid, and the product name of the medicinal liquid. By displaying at least a portion of the information read from the data carrier in this way, it is possible to confirm at a glance whether the attached syringe is filled with the medicinal liquid to be injected.

[0246] 17 and 18 are examples of screen displays, and the displayed contents are not limited to these. They can be changed as desired. Furthermore, the displayed image may be only an image during detection as shown in FIG. 17, or only an image displaying read information as shown in FIG. 18, or both. When both are displayed, the data carrier detection image as shown in FIG. 17 may be displayed for, for example, 1.5 seconds during detection, and then, once data reading has been successfully completed, the syringe information image as shown in FIG. 18 may be displayed for, for example, 3 seconds, and then the syringe information image may be closed. [Explanation of symbols]

[0247] 100 Chemical injection device 101 Console 103 Touch Panel 110 Injection Head 112 Presser 152 Console control circuit 153, 155 Wireless communication module 158 Head control circuit 162 Motor 163 Motor current measurement circuit 164 RFID control circuit 165 Antenna 166 RFID modules 130 Power Box 200 Fluoroscopic imaging device 600 adapter 800 syringes 802 RFID tags

Claims

1. an injection head on which a container containing a liquid medicine is detachably mounted; a control circuit; a reader for reading information from a data carrier provided in the container; A display device; and The control circuit is configured to cause the display device to display that the container has been loaded onto the injection head.

2. The chemical liquid injection system according to claim 1 , wherein the data carrier includes one of an RFID tag, a barcode, and a two-dimensional code.

Images