Medical image diagnosis device and program

Abstract

To suppress unnecessary power consumption.SOLUTION: A medical image diagnosis device according an embodiment includes an acquisition unit, a detection unit, and a control unit. The acquisition unit acquires an image output by a camera that images a situation related to operation of the medical image diagnosis device. The detection unit detects a surrounding situation of the medical image diagnosis device on the basis of a result of image processing on the image. The control unit operates each of a plurality of targets to be operated by controlling a plurality of circuits on the basis of the surrounding situation.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The embodiments disclosed in this specification and the drawings relate to a medical image diagnostic apparatus and a program. [Background technology]

[0002] Conventionally, magnetic resonance imaging (MRI) devices (hereinafter referred to as MRI devices) have been used as medical diagnostic devices that perform diagnosis using images. In recent years, with the increasing demand for eco-friendliness, there has been a growing demand for power saving in MRI devices as well. For this reason, for example, there is a method of controlling the ON-OFF of circuits that control devices that consume a lot of power, using bed position information as a trigger.

[0003] However, in the above method, for example, forgetting to lower the bed can hinder power saving. In addition, while power saving is required, improvements in workflow are also required. For example, when performing continuous scans (imaging) using a contrast agent, wasteful power consumption may occur in the intervals between scans. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] JP 2013-128746 A Summary of the Invention [Problem to be solved by the invention]

[0005] The problem to be solved by the embodiments disclosed in this specification and the drawings is to suppress wasteful power consumption. However, the problem to be solved by the embodiments disclosed in this specification and the drawings is not limited to the above problem. Problems corresponding to the effects of each configuration shown in the embodiments described later can also be positioned as other problems. [Means for solving the problem]

[0006] The medical image diagnostic device of the embodiment has an acquisition unit, a detection unit, and a control unit. The acquisition unit acquires an image output by a camera that captures a situation related to the operation of the medical image diagnostic device. The detection unit detects the surrounding situation of the medical image diagnostic device based on a result of image processing of the image. The control unit controls a plurality of circuits to operate a plurality of operating objects, respectively, based on the surrounding situation. [Brief description of the drawings]

[0007] [Figure 1] FIG. 1 is a block diagram showing an example of the configuration of an MRI apparatus 1 according to an embodiment. [Diagram 2] FIG. 2 is a detailed configuration diagram of the gradient magnetic field power supply 10. [Diagram 3] FIG. 2 is a detailed configuration diagram of a high-frequency power supply provided in the transmitter 12. [Figure 4] FIG. 4 is a detailed configuration diagram of a general-purpose power supply 14. [Diagram 5] FIG. 11 is a diagram showing an example of a relationship between a device and a startup time. [Figure 6] 4 is a flowchart showing an example of processing in the MRI apparatus 1. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0008] Hereinafter, a medical image diagnostic apparatus and a program according to an embodiment will be described with reference to the drawings.

[0009] The medical imaging device of the embodiment is, for example, an MRI device. The MRI device is a medical diagnostic device that irradiates an RF pulse to a subject (for example, a human body) while applying a strong magnetic field, receives electromagnetic waves generated from hydrogen nuclei in the subject's body by a nuclear magnetic resonance phenomenon using an RF coil, and reconstructs a nuclear magnetic resonance signal (hereinafter, referred to as an MR signal) based on the received electromagnetic waves to capture a tomographic image (hereinafter, referred to as an MR image) of the subject. In the embodiment, the medical imaging diagnostic device is an MRI device 1, but the medical imaging diagnostic device may be other than the MRI device 1. The medical imaging diagnostic device may be, for example, an X-ray computed tomography device, an X-ray diagnostic device, an ultrasonic diagnostic device, a nuclear medicine diagnostic device, or the like.

[0010] The MRI apparatus may take an MR image of a subject by reconstructing an MR signal based on electromagnetic waves received by an RF coil attached to the subject. The MRI apparatus displays the MR image of the subject, allowing an operator such as a technician performing the MRI examination to visually check whether or not the subject has a lesion.

[0011] 1 is a block diagram showing an example of the configuration of an MRI apparatus 1 according to an embodiment. The MRI apparatus 1 includes, for example, an imaging system 2 and a control system 3. The imaging system 2 includes, for example, a static magnetic field magnet 4, a shim coil 5, a gradient magnetic field coil 6, a whole body coil (hereinafter, WBC) 7, a receiving RF coil 8, a static magnetic field power supply 9, a gradient magnetic field power supply 10, a shim coil power supply 11, a transmitter 12, a receiver 13, a general-purpose power supply 14, a bed device 15, a gantry 16, a projector 17, and an operation button 18. The imaging system 2 is an example of an imaging device.

[0012] These components are components for performing imaging of the subject P. The cylindrical static magnetic field magnet 4, shim coil 5, gradient magnetic field coil 6, and WBC 7 constituting the imaging system 2 are built into a gantry 16. A bore (opening) is formed in the center of the gantry 16, and an imaging region of the imaging device is formed within the bore.

[0013] The static magnetic field magnet 4 of the imaging system 2 receives power from a static magnetic field power supply 9 to form a static magnetic field in the imaging region. The shim coil 5 receives power from a shim coil power supply 11 to improve the uniformity of the static magnetic field. The gradient magnetic field coil 6 receives power from a gradient magnetic field power supply 10 to form a gradient magnetic field in the imaging region.

[0014] The static magnetic field power supply 9 supplies power to the static magnetic field magnet 4 based on the control executed in the control system 3. The gradient magnetic field power supply 10 supplies power to the gradient magnetic field coil 6 based on the control executed in the control system 3. The shim coil power supply 11 supplies power to the shim coil 5 based on the control executed in the control system 3.

[0015] 2 is a detailed configuration diagram of the gradient magnetic field power supply 10. The gradient magnetic field power supply 10 includes, for example, a first high-voltage generating circuit 10H, an X-axis amplifier 10X, a Y-axis amplifier 10Y, and a Z-axis amplifier 10Z. The first high-voltage generating circuit 10H is connected to a commercial AC power supply 50 outside the MRI apparatus 1.

[0016] The high voltage current generated in the first high voltage generating circuit 10H is amplified in the X-axis amplifier 10X, the Y-axis amplifier 10Y, and the Z-axis amplifier 10Z, respectively, and output to the X-axis gradient magnetic field coil 6X, the Y-axis gradient magnetic field coil 6Y, and the Z-axis gradient magnetic field coil 6Z, which are high voltage compatible devices. The X-axis amplifier 10X, the Y-axis amplifier 10Y, and the Z-axis amplifier 10Z all function as output circuits of the gradient magnetic field power supply 10. Each of these output circuits is provided with a switch circuit 10B. For example, a semiconductor switch circuit for an inverter is used as these output circuits.

[0017] 3 is a detailed configuration diagram of a high-frequency power supply provided in the transmitter 12. The high-frequency power supply 12A provided in the transmitter 12 includes, for example, a second high-voltage generating circuit 12H and an amplifier 12C. The second high-voltage generating circuit 12H is connected to a commercial AC power supply 50 outside the MRI apparatus 1.

[0018] The high voltage current generated in the second high voltage generating circuit 12H is amplified by the amplifier 12C and output to the WBC 7, which is a high voltage compatible device and an RF coil for transmission, via other circuits of the transmitter 12. The amplifier 12C of the high frequency power supply 12A is provided with an output power control circuit 12D.

[0019] The transmitter 12 further applies an RF magnetic field from the WBC 7 to the imaging region by outputting an RF transmission signal to the WBC 7. The receiver 13 acquires the MR signals received by the WBC 7 or the receiving RF coil 8 and performs signal processing including A / D (analog to digital) conversion to generate MR receiving data. The receiving RF coil 8 is, for example, a coil attached to the subject P for receiving the MR signals.

[0020] 4 is a detailed configuration diagram of the universal power supply 14. The universal power supply 14 includes, for example, a medium voltage generating circuit 14M and a low voltage generating circuit 14L. The medium voltage generating circuit 14M generates a medium voltage current, and the low voltage generating circuit 14L generates a low voltage. The medium voltage current generated by the medium voltage generating circuit 14M is supplied to a medium voltage compatible device provided on the stand 16. The low voltage current generated by the low voltage generating circuit 14L is supplied to a low voltage compatible device provided on the stand 16. The medium voltage generating circuit 14M and the low voltage generating circuit 14L are both connected to a commercial AC power supply 50 outside the universal power supply 14.

[0021] The high-voltage compatible devices, medium-voltage compatible devices, and low-voltage compatible devices are determined, for example, according to the time required for startup from a stopped state (hereinafter referred to as startup time). The startup time is determined in advance for each device and stored in memory 24. The startup time of a device is common to the startup time of a generation circuit that supplies current to the device. The startup time of a high-voltage compatible device is common to the startup time of a first high-voltage generation circuit 10H and a second high-voltage generation circuit 12H. The startup time of a medium-voltage compatible device is common to the startup time of a medium voltage generation circuit 14M. The startup time of a low-voltage compatible device is common to the startup time of a low-voltage generation circuit 14L.

[0022] 5 is a diagram showing an example of the relationship between devices and startup times. A low-voltage compatible device has a shorter startup time than a medium-voltage compatible device and a high-voltage compatible device, and a medium-voltage compatible device has a shorter startup time than a high-voltage compatible device. For example, a device whose startup time exceeds 30 seconds is a high-voltage compatible device. A device whose startup time exceeds 5 seconds and is less than 30 seconds is a medium-voltage compatible device. A device whose startup time is 5 seconds or less is a low-voltage compatible device.

[0023] The X-axis gradient magnetic field coil 6X, the Y-axis gradient magnetic field coil 6Y, the Z-axis gradient magnetic field coil 6Z, and the WBC 7, which are high-voltage compatible devices, are all operating objects used for imaging by the imaging device. The high-voltage compatible device, the medium-voltage compatible device, and the low-voltage compatible device are all examples of operating objects. The high-voltage compatible device is an example of a first operating object. The medium-voltage compatible device is an example of a second operating object. The low-voltage compatible device is an example of a third operating object.

[0024] Returning to Fig. 1, the bed device 15 includes a tabletop 15A and a bed driving device 15B. The subject P is placed on the tabletop 15A of the bed device 15. The bed driving device 15B moves the tabletop 15A vertically or in the longitudinal direction. At the start of imaging, the bed driving device 15B positions the tabletop 15A on which the subject P is set to a predetermined height, and carries the tabletop 15A together with the subject P into the bore of the gantry 16 in which the imaging area is formed.

[0025] On the other hand, when imaging is completed, the bed driving device 15B moves the top board 15A, which has been carried into the bore of the gantry 16, onto the bed device 15. The bed driving device 15B then lowers the top board 15A as necessary. In this manner, the bed driving device 15B can move the top board 15A.

[0026] The imaging system 2 is provided on the stand 16, and a floodlight 17 for irradiating positioning light toward the top board 15A is provided in the bore of the stand 16. An operation button 18 for operating the floodlight 17 is provided on the stand 16. The operation button 18 generates operation information when the floodlight 17 is operated, and the operation information is output to the control system 3 by the operation button 18.

[0027] The control system 3 includes, for example, a calculation device 20, a sequence controller 30, and an optical camera 40. The control system 3 includes components for controlling each device of the imaging system 2 and components for generating MR image data based on the MR signals collected in the imaging system 2. The calculation device 20 includes, for example, an input interface 21, a display 22, a communication interface 23, a memory 24, and a processing circuit 25.

[0028] The input interface 21 accepts various input operations by the operator of the MRI apparatus 1, and outputs an electric signal indicating the content of the accepted input operation to the processing circuit 25. The input interface 21 is realized by, for example, a mouse, a keyboard, a touch panel, a trackball, a switch, a button, a joystick, a camera, an infrared sensor, a microphone, or the like. When the input interface 21 is a touch panel, the display 22 may be formed integrally with the input interface 21. The input interface 21 may be provided on the stand 16. When the input interface 21 is formed integrally with the display 22, the input interface 21 may be realized by a tablet terminal or the like.

[0029] In this specification, the input interface 21 is not limited to an interface having physical operation parts such as the above-mentioned mouse and keyboard. For example, an example of the input interface 21 also includes an electrical signal processing circuit that receives an electrical signal corresponding to an input operation from an external input device and outputs the electrical signal to the processing circuit 25.

[0030] The display 22 displays various types of information. For example, the display 22 displays images generated by the processing circuitry 25, GUI (Graphical User Interface) images that accept various operations by the operator of the MRI apparatus 1, and the like. The display 22 is, for example, a Liquid Crystal Display (LCD), a CRT (Cathode Ray Tube) display, an organic EL (Electroluminescence) display, or the like.

[0031] The display 22 may be provided, for example, on the gantry 16, or may be provided at a position in the examination room away from the gantry 16, or may be provided in a room separate from the examination room. When the display 22 is provided at a position in the examination room away from the gantry 16, for example, the display 22 may be provided on a wagon disposed to the side of the gantry 16, or may be hung from the ceiling of the examination room. The display 22 may be a desktop type, or may be a display device capable of wireless communication with the main body of the arithmetic device 20, for example, a tablet terminal.

[0032] The communication interface 23 communicates with an external device such as the optical camera 40 via, for example, a bus. The communication interface 23 receives information such as an image transmitted by the optical camera 40. The communication interface 23 outputs the received information to the processing circuit 25. The communication interface 23 includes a communication interface such as a NIC.

[0033] The memory 24 is realized by, for example, a semiconductor memory element such as a ROM, a RAM, or a flash memory, a hard disk drive (HDD), an optical disk, etc. The memory 24 stores data such as an imaging sequence that defines an imaging procedure, MR data output by the sequence controller 30, and a reconstructed image (MR image) generated based on the MR data. Some imaging sequences include consecutive scans, while others do not. A consecutive scan is a scan in which the interval between two scans is within a certain time.

[0034] The processing circuitry 25 communicates with an external device and controls the overall operation of the MRI apparatus 1. The processing circuitry 25 sets sequence information in the sequence controller 30. The processing circuitry 25 includes, for example, an acquisition function 26, a detection function 27, and a control function 28. The processing circuitry 25 realizes these functions by, for example, a hardware processor (computer) executing a program stored in a memory (storage circuitry) 24.

[0035] The hardware processor refers to circuitry such as a CPU, a graphics processing unit (GPU), an application specific integrated circuit (ASIC), a programmable logic device (e.g., a simple programmable logic device (SPLD) or a complex programmable logic device (CPLD)), and a field programmable gate array (FPGA).

[0036] Instead of storing the program in the memory 24, the program may be directly embedded in the circuit of the hardware processor. In this case, the hardware processor realizes the function by reading and executing the program embedded in the circuit. The above program may be stored in the memory 24 in advance, or may be stored in a non-transitory storage medium such as a DVD or CD-ROM, and installed in the memory 24 from the non-transitory storage medium by mounting the non-transitory storage medium in a drive device (not shown) provided in the computing device 20.

[0037] The hardware processor is not limited to being configured as a single circuit, but may be configured as a single hardware processor by combining multiple independent circuits to realize each function. Also, multiple components may be integrated into a single hardware processor to realize each function.

[0038] The acquisition function 26 acquires an image output by the camera and received by the communication interface 23. The acquisition function 26 is an example of an acquisition unit. The acquisition function 26 further acquires information generated based on an input operation by an operator such as an engineer and output by the input interface 21.

[0039] The detection function 27 processes the image acquired by the acquisition function 26, and detects the surrounding conditions of the MRI apparatus 1 based on the result of the image processing. The surrounding conditions include, for example, whether the subject P is placed on the top board 15A of the bed device 15 in the MRI apparatus 1, whether the subject P is being carried into the gantry 16, and the like. The surrounding conditions include detecting the presence of an operator near the gantry 16. The detection function 27 is an example of a detection unit.

[0040] The control function 28 controls the multiple circuits to operate the multiple operating objects, based on the surrounding conditions detected by the detection function 27. The circuits here include, for example, a first high voltage generation circuit 10H, a second high voltage generation circuit 12H, a medium voltage generation circuit 14M, and a low voltage generation circuit 14L. The control function 28 is an example of a control unit.

[0041] The sequence controller 30 controls the gradient magnetic field power supply 10 , the transmitter 12 and the receiver 13 based on imaging conditions including the pulse sequence output by the arithmetic device 20 .

[0042] The optical camera 40 is attached, for example, to a ceiling in an examination room in which the MRI apparatus 1 is installed. The optical camera 40 is disposed above the bed device 15 in the imaging system 2, and captures images of a situation related to the operation of the MRI apparatus 1, for example, an environment surrounding a subject P placed on the top board 15A at a certain interval. The optical camera 40 may capture a video instead of or in addition to an image.

[0043] The optical camera 40 transmits an image (including a video) including the captured surrounding environment of the subject P to the calculation device 20. The situation related to the operation of the MRI apparatus 1 includes, for example, the situation of the subject P and the state of the surrounding environment of the subject P, the situation of devices (equipment) provided around the bed apparatus 15 and the gantry 16, and the situation of an operator positioned near the bed apparatus 15. The situation of the subject P includes, for example, the situation when the subject P is placed on the tabletop 15A, and the situation when the subject P is carried into or out of the gantry 16. The situation of the operator includes, for example, the situation of whether the operator is near the gantry 16.

[0044] Next, the processing in the MRI apparatus 1 will be described. Fig. 6 is a flow chart showing an example of the processing in the MRI apparatus 1. Here, the processing after the imaging of the subject P is started in the MRI apparatus 1 and the subject P is placed on the top board 15A of the bed device 15 will be described. During this time, the optical camera 40 captures images of the vicinity of the top board 15A at regular intervals and transmits images including the surrounding environment of the subject P to the calculation device 20.

[0045] First, in the MRI apparatus 1, the acquisition function 26 acquires an image transmitted by the optical camera 40. Next, the detection function 27 processes the image acquired by the acquisition function 26 and determines whether or not the subject P placed on the tabletop 15A has been detected as the surrounding situation (step S101). If it is determined that the subject P placed on the tabletop 15A has not been detected, the detection function 27 repeats the process of step S101.

[0046] When the detection function 27 determines that the subject P placed on the top board 15A has been detected, the control function 28 causes the first high voltage generating circuit 10H in the gradient magnetic field power supply 10 and the second high voltage generating circuit 12H in the transmitter 12 to output high voltage current to activate the high voltage compatible device having the longest activation time (step S103). Next, the detection function 27 processes the image acquired by the acquisition function 26 and determines whether the subject P has been carried into the bore of the gantry 16 as the surrounding situation (step S105).

[0047] When it is determined that the subject P has not been carried into the bore of the gantry 16, the detection function 27 repeats the process of step S105. When the detection function 27 detects that the subject P has been carried into the bore of the gantry 16, the control function 28 causes the medium voltage generating circuit 14M in the general-purpose power supply 14 to output a medium voltage current, thereby starting up the medium voltage compatible device, whose start-up time is shorter than that of the high voltage compatible device and longer than that of the low voltage compatible device (step S107).

[0048] Thereafter, the control function 28 executes processing according to the imaging sequence stored in the memory 24, and when it is time to start a scan, starts a scan of the subject P (step S109). For example, the control function 28 may start a scan when it detects that the operator has left the gantry 16 based on the surrounding situation obtained by image processing in the detection function 27.

[0049] When the scan of the subject P is started, the control function 28 causes the low-voltage generating circuit 14L in the general-purpose power supply 14 to output a low-voltage current, thereby activating the low-voltage compatible device having the shortest startup time (step S111). After that, the scan of the subject P is completed through processing according to the imaging sequence (step S113).

[0050] Next, the control function 28 continues the operation of the low-voltage compatible device in operation until the operation stop condition is satisfied. The operation stop condition is, for example, the end of the last scan of the continuous scans. In this case, the control function 28 determines whether to perform the scans continuously (step S115).

[0051] Whether or not to perform successive scans is determined based on, for example, whether or not successive scans are defined in the imaging sequence. Whether or not to perform successive scans may be determined by other procedures, for example, based on the surrounding situation obtained by image processing in the detection function 27. In this case, the control function 28 determines whether or not an operator is approaching the gantry 16 by image processing in the detection function 27. The control function 28 may determine not to perform successive scans (stop the operating object) when an operator is approaching the gantry 16, and may determine to perform successive scans (continue operation of the operating object) when an operator is not approaching.

[0052] When it is determined that the scans are to be performed continuously, the control function 28 continues the operation of all of the high-voltage compatible devices, the medium-voltage compatible devices, and the low-voltage compatible devices without stopping them (step S117), and returns the process to step S113. When it is determined that the scans are not to be performed continuously, the control function 28 stops the output of the low-voltage current by the low-voltage generating circuit 14L, and stops the low-voltage compatible device with the shortest startup time (step S119).

[0053] After the continuous scans are performed, in step S117, when the control function 28 determines not to perform the continuous scans, the last scan in the continuous scans ends. The control function 28 continues the operation of the operation target that is currently in operation until the operation stop condition is satisfied.

[0054] Next, the control function 28 determines whether or not to perform a rescan before carrying out the subject P from the gantry (step S121). For example, after stopping the low-voltage compatible device, the control function 28 determines whether or not to perform a rescan based on the imaging sequence or whether or not an operator approaches (has already approached) the gantry 16.

[0055] When it is determined that a rescan is to be performed, the control function 28 returns the process to step S109. When it is determined that a rescan is not to be performed, the control function 28 performs image processing on the image acquired by the acquisition function 26, and determines whether or not the subject P has been carried out from the gantry 16 as the surrounding situation (step S123).

[0056] When it is determined that the subject P has not been removed from the gantry 16, the detection function 27 returns the process to step S121, and the control function 28 determines whether or not to execute a rescan. When the detection function 27 determines that the subject P has been carried out from the gantry 16, the control function 28 stops the output of high voltage current and medium voltage current by the first high voltage generating circuit 10H, the second high voltage generating circuit 12H, and the medium voltage generating circuit 14M, respectively, and stops the high voltage compatible device and the medium voltage compatible device (step S125). In this way, the MRI apparatus 1 ends the process shown in FIG.

[0057] The MRI apparatus 1 of the embodiment detects the surrounding situation of the MRI apparatus 1 based on the image captured by the optical camera 40, and controls each circuit that operates the high-voltage compatible device, the medium-voltage compatible device, and the low-voltage compatible device based on the detected surrounding situation. This makes it possible to prevent power consumption due to forgetting to lower the bed, and to suppress unnecessary power consumption. Furthermore, since unnecessary power consumption when an imaging sequence is set can be suppressed, it can also contribute to improving the workflow.

[0058] In the above embodiment, the optical camera 40 is used as the camera, and the image captured by the optical camera 40 is processed to detect the surrounding situation of the MRI apparatus 1, but the image acquired by the acquisition function 26 may be sufficient to recognize the situation of the subject P or the operator, for example. In this case, for example, an infrared camera may be used as the camera instead of the optical camera 40.

[0059] When the surrounding conditions of the MRI apparatus 1 are other than the conditions of the subject P or the operator, for example, the presence or absence of a contrast agent injector, it is sufficient for the camera to capture an image that can recognize these conditions. For example, the surrounding conditions of the MRI apparatus 1 may be the height position of the tabletop 15A of the bed device 15, or the lit or blinking state of a notification lamp that lights up or blinks when the imaging system 2 is operating. In this case, the camera may be a camera that can capture an image of the tabletop 15A and the notification lamp.

[0060] In the above embodiment, the surrounding conditions of the MRI apparatus 1 are detected based on the images captured by the optical camera 40, but part of the surrounding conditions of the MRI apparatus 1 may be other than the surrounding conditions detected based on the images captured by the optical camera 40. For example, the postures and positions of the subject P and the operator may be detected by image processing the images captured by the optical camera 40, and the operating state of the imaging system 2 may be appropriately detected by a sensor provided in the imaging system 2.

[0061] In the above embodiment, the operation stop condition is that the last scan in the continuous scans has ended, but the operation stop condition may be another condition. For example, the operation stop condition may be that the imaging sequence is an imaging sequence in an examination using a contrast agent. In this case, too, the process can be performed according to the flowchart shown in FIG.

[0062] In this case, the operation stop condition is the end of the last scan in the imaging sequence. Therefore, in this case, for example, in the flowchart shown in FIG. 6, consecutive scans and rescans may be regarded as synonymous, and the processes from step S115 to step S119 may be skipped.

[0063] In the above embodiment, when the operation of a device is stopped when the operation stop condition is satisfied, if a time during which the device is required to operate (hereinafter, the operation request time) is set in the imaging sequence, the operation of the device may be stopped (interrupted) based on the interval between the operation request times and the startup time of the device. In this case, for example, if the interval between the operation request times is longer than the startup time of the device or a reference time with a margin added to the startup time, the operation of the device may be stopped (interrupted).

[0064] In the above embodiment, the devices (circuits) that are operated or stopped according to the surrounding conditions of the MRI apparatus 1 are divided into three stages, high voltage, medium voltage, and low voltage, but they may be divided into two stages or four or more stages. In addition, the low voltage compatible device is stopped when continuous scans are not performed, but one or two of the high voltage compatible device, medium voltage compatible device, and low voltage compatible device may be stopped or operated under other conditions.

[0065] In the above embodiment, the control function 28 determines which devices to operate or stop depending on the length of the startup time set for the device, but the control function 28 may determine which devices to operate or stop depending on the power consumption of the device. In the above embodiment, the control function 28 makes it easier to stop a device that has a longer startup time, but in this case, the control function 28 may make it easier to stop (restart after stopping) a device that consumes less power, for example.

[0066] In the above embodiment, the control in the case where the subject of imaging is the subject P is described, but the subject of imaging may be something other than the subject P, for example, a phantom. When the subject of imaging is a phantom, the phantom is imaged according to the flowchart shown in Fig. 6, and after the imaging sequence is completed, the operation of the MRI apparatus 1 may be terminated without removing the phantom from the gantry 16. For this reason, when the subject of imaging is a phantom, for example, instead of the determination in step S123, it may be determined whether or not the lights in the examination room have been turned off, and if the lights have been turned off, the process of step S125 may be executed.

[0067] According to at least one of the embodiments described above, by having an acquisition unit that acquires an image output by a camera that captures a situation related to the operation of the medical image diagnostic device, a detection unit that detects the surrounding situation of the medical image diagnostic device based on the result of image processing of the image, and a control unit that controls a plurality of circuits to operate a plurality of operating objects based on the surrounding situation, it is possible to reduce unnecessary power consumption.

[0068] Although some embodiments have been described, these embodiments are presented as examples and are not intended to limit the scope of the invention. These embodiments can be implemented in various other forms, and various omissions, substitutions, and modifications can be made without departing from the spirit of the invention. These embodiments and their modifications are included in the scope of the invention and its equivalents as described in the claims, as well as in the scope and spirit of the invention. [Explanation of symbols]

[0069] 1...MRI device 2. Imaging system 3. Control system 4...Magnet for static magnetic field 5…Shim coil 6...Gradient magnetic field coil 6X…X-axis gradient coil 6Y: Y-axis gradient coil 6Z: Z-axis gradient coil 7. World Baseball Classic 8…Receiving RF coil 9…Static magnetic field power supply 10…Gradient magnetic field power supply 10B…Switch circuit 10H…First high voltage generating circuit 10X…X-axis amplifier 10Y…Y-axis amplifier 10Z…Z-axis amplifier 11…Shim coil power supply 12...Transmitter 12A…High frequency power supply 12C…Amplifier 12D…Output power control circuit 12H…Second high voltage generating circuit 13...Receiver 14...General-purpose power supply 14L…Low voltage generation circuit 14M...Medium voltage generating circuit 15...Sleeping device 15A…Tabletop 15B…Bed drive unit 16…Frame 17...Floodlight 18...Operation buttons 20...Arithmetic device 21...Input interface 22…Display 23...Communication interface 24...Memory (memory circuit) 24…Memory 25...Processing circuit 26…Acquisition function 27…Detection function 28…Control function 30...Sequence controller 40...Optical camera 50…Commercial AC power supply P...Subject

Claims

1. an acquisition unit that acquires an image output by a camera that captures an image related to the operation of the medical image diagnostic device; a detection unit that detects the surrounding situation of the medical image diagnostic device based on a result of image processing of the image; A control unit that controls a plurality of circuits to operate a plurality of operating objects based on the surrounding conditions. Medical imaging diagnostic equipment.

2. The detection unit detects a state of the subject in the image as the surrounding state, The control unit controls the plurality of circuits based on a condition of the subject. The medical image diagnostic apparatus according to claim 1 .

3. The control unit controls the plurality of circuits in accordance with a startup time required for starting each of the plurality of operating objects. The medical image diagnostic apparatus according to claim 2 .

4. The startup time is set according to the plurality of operating objects. The medical image diagnostic apparatus according to claim 3 .

5. The control unit controls the plurality of circuits in accordance with the power consumption of each of the plurality of operating objects. The medical image diagnostic apparatus according to claim 2 .

6. A stand on which an imaging device is provided; a bed on which a subject is mounted and on which the subject is carried into an imaging area of ​​the imaging device on the gantry, The plurality of operating objects include an operating object used for imaging by the imaging device, The medical image diagnostic apparatus according to claim 2 .

7. the control unit activates a first operating object among the plurality of operating objects when the surrounding situation in which the subject is placed on the bed is detected. The medical image diagnostic apparatus according to claim 6.

8. when the surrounding situation in which the subject is carried onto the bed is detected, the control unit activates a second operating object among the plurality of operating objects, the second operating object having a startup time required for startup that is shorter than that of the first operating object. The medical image diagnostic apparatus according to claim 7.

9. the control unit, when the surrounding situation in which a worker positioned near the bed has moved away from the bed is detected, activates a third operation object among the plurality of operation objects, the third operation object having a startup time shorter than that of the second operation object. The medical image diagnostic apparatus according to claim 8.

10. The control unit stops the operation target that is in operation when the surrounding situation in which a worker who has left the bed approaches the bed is detected. The medical image diagnostic apparatus according to claim 7.

11. The control unit continues operation of the operation target that is currently in operation until an operation suspension condition is satisfied. The medical image diagnostic apparatus according to claim 6.

12. The stop condition includes the completion of the last scan in a series of scans. The medical image diagnostic apparatus according to claim 11.

13. The stop operation condition includes that a last scan in an imaging sequence using contrast agent has been completed. The medical image diagnostic apparatus according to claim 11.

14. On the computer, Acquire an image output by a camera that captures an image of a situation related to the operation of the medical image diagnostic device; Detecting the surroundings of the medical image diagnostic device based on the result of image processing of the image; Based on the surrounding conditions, a plurality of circuits are controlled to operate a plurality of operation targets, respectively. program.

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