Medical imaging diagnostic apparatus, medical imaging diagnostic method, and program

Abstract

To accurately measure the weight of an analyte placed on a bed.SOLUTION: A medical image diagnostic apparatus according to an embodiment has a first acquisition part, a recognition part, a second acquisition part, and a calculation part. The first acquisition part acquires a load applied to the bed on which the analyte being a target of image diagnosis is placed. The recognition part recognizes an object mounted on the bed. The second acquisition part acquires the weight of the object. The calculation part calculates the weight of the analyte on the bed based on the load and the weight of the object.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The embodiments disclosed in this specification and the drawings relate to a medical imaging diagnostic apparatus, a medical imaging diagnostic method, and a program.

Background Art

[0002] In a diagnosis using a medical imaging diagnostic apparatus such as an X-ray CT (Computed Tomography) apparatus, for example, in order to determine the amount of a contrast agent to be administered to a subject according to the weight (body weight) of the subject, the weight of the subject may be measured. Regarding the weight of the subject, some measure it using a load sensor such as a load cell provided on a bed included in the medical imaging diagnostic apparatus.

[0003] Also, when performing an image diagnosis of a subject, in addition to the subject P, accessories such as a pump may be mounted on the bed. If the weight of the subject is measured with such accessories mounted, it may not be possible to accurately measure the weight. When the weight of the subject cannot be accurately measured, it becomes difficult to appropriately set the amount of the contrast agent.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Patent Document 2

Patent Document 3

Summary of the Invention

Problems to be Solved by the Invention

[0005] The problem to be solved by the embodiments disclosed in this specification and the drawings is to accurately measure the weight of a subject placed on a bed. However, the problems to be solved by the embodiments disclosed in this specification and the drawings are not limited to the above problems. It is also possible to position, as other problems, the problems corresponding to the respective effects of the respective configurations shown in the embodiments described later.

Means for Solving the Problems

[0006] The medical imaging diagnostic apparatus according to the embodiment includes a first acquisition unit, a recognition unit, a second acquisition unit, and a calculation unit. The first acquisition unit acquires the load applied to the bed on which the subject to be imaged is placed. The recognition unit recognizes the object mounted on the bed. The second acquisition unit acquires the weight of the object. The calculation unit calculates the weight of the subject on the bed based on the load and the weight of the object.

Brief Description of the Drawings

[0007]

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Mode for Carrying Out the Invention

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

[0009] (First Embodiment) FIG. 1 is a configuration diagram of the X - ray CT apparatus 1 according to the first embodiment. The X - ray CT apparatus 1 includes, for example, a gantry device 10, a camera unit 20, a bed device 30, and a console device 40. In FIG. 1, for convenience of explanation, both a view of the gantry device 10 seen from the Z - axis direction and a view seen from the X - axis direction are shown, but actually, there is only one gantry device 10. In the embodiment, the rotation axis of the rotating frame 17 or the longitudinal direction of the top plate 33 of the bed device 30 in the non - tilted state is defined as the Z - axis direction, an axis orthogonal to the Z - axis direction and horizontal with respect to the floor surface is defined as the X - axis direction, and a direction orthogonal to the Z - axis direction and perpendicular to the floor surface is defined as the Y - axis direction. The X - ray CT apparatus 1 is an example of a medical image diagnostic apparatus.

[0010] The gantry device 10 includes, for example, an X-ray tube 11, a wedge 12, a collimator 13, an X-ray high-voltage device 14, an X-ray detector 15, a data acquisition system (hereinafter, DAS: Data Acquisition System) 16, a rotating frame 17, and a control device 18.

[0011] The X-ray tube 11 generates X-rays by irradiating thermoelectrons from the cathode (filament) toward the anode (target) by applying a high voltage from the X-ray high-voltage device 14. The X-ray tube 11 includes a vacuum tube. For example, the X-ray tube 11 is a rotating anode type X-ray tube that generates X-rays by irradiating a rotating anode with thermoelectrons.

[0012] The wedge 12 is a filter for adjusting the X-ray dose irradiated from the X-ray tube 11 to the subject P. The wedge 12 attenuates the X-rays transmitted through itself so that the distribution of the X-ray dose irradiated from the X-ray tube 11 to the subject P becomes a predetermined distribution. The wedge 12 is also called a wedge filter or a bow-tie filter. The wedge 12 is, for example, made by processing aluminum to have a predetermined target angle and a predetermined thickness.

[0013] The collimator 13 is a mechanism for narrowing down the irradiation range of the X-rays transmitted through the wedge 12. The collimator 13 narrows down the irradiation range of the X-rays, for example, by forming a slit by combining a plurality of lead plates. The collimator 13 may also be called an X-ray aperture. The narrowing range of the collimator 13 may be mechanically drivable.

[0014] The X-ray high-voltage device 14 has, for example, a high-voltage generator and an X-ray control device. The high-voltage generator has an electric circuit including a transformer and a rectifier, etc., and generates a high voltage to be applied to the X-ray tube 11. The X-ray control device controls the output voltage of the high-voltage generator according to the X-ray dose to be generated by the X-ray tube 11. The high-voltage generator may perform voltage boosting by the above-described transformer, or may perform voltage boosting by an inverter. The X-ray high-voltage device 14 may be provided on the rotating frame 17, or may be provided on the side of the fixed frame (not shown) of the gantry device 10.

[0015] The X-ray detector 15 detects the intensity of the X-rays generated by the X-ray tube 11 and incident after passing through the subject P. The X-ray detector 15 outputs an electric signal (which may be an optical signal, etc.) corresponding to the detected intensity of the X-rays to the DAS 16. The X-ray detector 15 has, for example, a plurality of X-ray detection element arrays. Each of the plurality of X-ray detection element arrays has a plurality of X-ray detection elements arranged in the channel direction along an arc centered on the focal point of the X-ray tube 11. The plurality of X-ray detection element arrays are arranged in the slice direction (column direction, row direction).

[0016] The X-ray detector 15 is, for example, an indirect-type detector having a grid, a scintillator array, and an optical sensor array. The scintillator array has a plurality of scintillators. Each scintillator has a scintillator crystal. The scintillator crystal emits light in an amount corresponding to the intensity of the incident X-rays. The grid is arranged on the surface of the scintillator array where the X-rays are incident and has an X-ray shielding plate having a function of absorbing scattered X-rays. Note that the grid may also be called a collimator (one-dimensional collimator or two-dimensional collimator). The optical sensor array has, for example, optical sensors such as photomultipliers (PMTs). The optical sensor array outputs an electric signal corresponding to the amount of light of the light emitted by the scintillator. The X-ray detector 15 may be a direct conversion-type detector having semiconductor elements that convert the incident X-rays into electric signals.

[0017] DAS16 includes, for example, an amplifier, an integrator, and an A / D converter. The amplifier performs amplification processing on the electrical signals output by each X-ray detection element of the X-ray detector 15. The integrator integrates the amplified electrical signals over the view period. The A / D converter converts the electrical signal indicating the integration result into a digital signal. DAS16 outputs detection data based on the digital signal to the console device 40.

[0018] The rotating frame 17 oppositely supports the X-ray tube 11, the wedge 12, and the collimator 13, and the X-ray detector 15. The rotating frame 17 is an annular member including circular both side surfaces with a circular opening formed at the center, an inner surface connecting the inner circles of both side surfaces, and an outer surface connecting the outer circles of both side surfaces. The both side surfaces of the rotating frame 17 are flat surfaces, and the inner surface and the outer surface are curved surfaces.

[0019] The rotating frame 17 is an annular member that oppositely supports the X-ray tube 11, the wedge 12, and the collimator 13, and the X-ray detector 15. The rotating frame 17 is rotatably supported about the subject P introduced therein by a fixed frame (not shown). The rotating frame 17 further supports DAS16. The detection data output by DAS16 is transmitted from a transmitter having a light-emitting diode (LED) provided on the rotating frame 17 to a receiver having a photodiode provided on a non-rotating portion (for example, a fixed frame) of the gantry device 10 by optical communication, and transferred to the console device 40 by the receiver. Note that the method for transmitting the detection data from the rotating frame 17 to the non-rotating portion is not limited to the method using the aforementioned optical communication, and any non-contact type transmission method may be adopted. The rotating frame 17 is not limited to an annular member as long as it can support and rotate the X-ray tube 11 and the like, and may be a member such as an arm.

[0020] The X-ray CT apparatus 1 is, for example, a Rotate / Rotate-Type X-ray CT apparatus (third-generation CT) in which both the X-ray tube 11 and the X-ray detector 15 are supported by a rotating frame 17 and rotate around the subject P. However, the present invention is not limited to this, and it may be a Stationary / Rotate-Type X-ray CT apparatus (fourth-generation CT) in which a plurality of X-ray detection elements arranged in an annular shape are fixed to a fixed frame and the X-ray tube 11 rotates around the subject P.

[0021] The control device 18 includes, for example, a processing circuit having a processor such as a CPU (Central Processing Unit), and a drive mechanism including a motor and an actuator. The processing circuit realizes these functions by executing a program stored in a storage device (storage circuit) by a hardware processor.

[0022] A hardware processor means, for example, a CPU (Central Processing Unit), a GPU (Graphics Processing Unit), 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), a field programmable gate array (FPGA), etc.). Instead of storing a program in a storage device, the program may be directly incorporated into the circuitry of the hardware processor. In this case, the hardware processor realizes its functions by reading and executing the program incorporated in the circuitry. The hardware processor is not limited to being configured as a single circuit, and may be configured as a single hardware processor by combining a plurality of independent circuits so as to realize each function. The storage device may be a non-temporary (hardware) storage medium. Also, a plurality of components may be integrated into a single hardware processor to realize each function.

[0023] The control device 18 rotates, for example, the rotating frame 17, tilts the gantry of the gantry device 10, moves the top plate 33 of the bed device 30 by vertical movement, or emits X-rays from the X-ray tube 11. The control device 18 may be provided in the gantry device 10 or may be provided in the console device 40.

[0024] The camera unit 20 includes, for example, a first camera 21 and a second camera 22. Both the first camera 21 and the second camera 22 are provided above the top plate 33 in the bed device 30. The camera unit 20 may include one camera or a plurality of cameras. The mounting position of the camera unit 20 may be a position other than the position in the first embodiment.

[0025] Both the first camera 21 and the second camera 22 are provided facing the direction of the bed device 30 at the upper part and the right side part on the side where the bed is provided in the gantry device 10. The camera unit 20 images, for example, accessories mounted on the top plate 33. The camera unit 20 transmits an electrical signal of an image including the imaged accessory to the console device 40. The top plate 33 is an example of a bed.

[0026] The bed device 30 is a device that places and moves a subject P to be scanned and introduces it into the inside of the rotating frame 17 of the gantry device 10. The bed device 30 includes, for example, a base 31, a bed driving device 32, a top plate 33, a support frame 34, and a load sensor 35. The base 31 includes a housing that supports the support frame 34 so as to be movable in the vertical direction (Y-axis direction). The bed driving device 32 includes a motor and an actuator. The bed driving device 32 moves the top plate 33 on which the subject P is placed along the support frame 34 in the longitudinal direction (Z-axis direction) of the top plate 33.

[0027] The bed driving device 32 may move not only the top plate 33 but also the support frame 34 in the longitudinal direction of the top plate 33. Conversely, the gantry device 10 may be movable in the Z-axis direction, and the rotation frame 17 may be controlled to come around the subject P by the movement of the gantry device 10. Also, a configuration in which both the gantry device 10 and the top plate 33 are movable may be adopted.

[0028] The load sensor 35 includes, for example, a first load sensor 35A and a second load sensor 35B. The first load sensor 35A and the second load sensor 35B each include, for example, a load transducer called a load cell that electrically converts a load. The first load sensor 35A is placed on the support frame 34 on one side in the longitudinal direction of the top plate 33 to support the top plate 33. The second load sensor 35B is placed on the support frame 34 on the other side in the longitudinal direction of the top plate 33 to support the top plate 33. The load sensor 35 is electrically connected to the console device 40.

[0029] The load transducer is a device that amplifies an electrical signal from a sensor (load cell) whose resistance value changes significantly due to a slight distortion of metal caused by force or weight, and converts the load into an electrical signal. As this load converter, for example, a strain gauge type load converter, a compression type (button or diaphragm) load cell, a tension / compression type (dual-purpose type) load cell, a beam type load cell, and a cantilever beam type load cell are used. The load sensor 35 transmits an electrical signal obtained by converting the load detected by each of the first load sensor 35A and the second load sensor 35B to the console device 40.

[0030] The console device 40 has, for example, a memory 41, a display 42, an input interface 43, and a processing circuit 50. In the embodiment, the console device 40 is described as a separate body from the gantry device 10, but a part or all of the components of the console device 40 may be included in the gantry device 10.

[0031] The memory 41 is realized by, for example, a semiconductor memory element such as a RAM (Random Access Memory) or a flash memory, a hard disk, an optical disk, etc. The memory 41 stores, for example, detection data, projection data, reconstructed image data, CT image data, etc. These data may be stored in an external memory that the X-ray CT apparatus 1 can communicate with instead of (or in addition to) the memory 41. The external memory is controlled by, for example, a cloud server that manages the external memory and accepts read / write requests.

[0032] The display 42 displays various types of information. For example, the display 42 displays medical images (CT images) generated by a processing circuit, GUI (Graphical User Interface) images for receiving various operations by an operator such as a doctor or a technician, and the like. The display 42 is, for example, a liquid crystal display, a CRT (Cathode Ray Tube), an organic EL (Electroluminescence) display, or the like. The display 42 may be provided on the gantry device 10. The display 42 may be a desktop type or a display device (for example, a tablet terminal) capable of wireless communication with the main body of the console device 40.

[0033] The input interface 43 receives various input operations by an operator and outputs an electrical signal indicating the content of the received input operation to the processing circuit 50. For example, the input interface 43 receives input operations such as collection conditions when collecting detection data or projection data, reconstruction conditions when reconstructing a CT image, and image processing conditions when generating a post-processing image from a CT image. The input interface 43 is realized, for example, by 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. The input interface 43 may be realized by a display device (for example, a tablet terminal) capable of wireless communication with the main body of the console device 40.

[0034] Note that in this specification, the input interface is not limited to only those having physical operation components such as a mouse and a keyboard. For example, an electrical signal processing circuit that receives an electrical signal corresponding to an input operation from an external input device provided separately from the device and outputs this electrical signal to the control circuit is also included in the examples of the input interface.

[0035] The memory 41 stores a weight correspondence table including the names of a plurality of accessories (hereinafter referred to as assumed accessories) that are assumed to be mounted on the top plate 33 during image diagnosis, and a list of weights (hereinafter referred to as specified weights) corresponding to the assumed accessories. FIG. 2 is a diagram showing an example of the content of the weight correspondence table. The weight correspondence table includes, in addition to the names of the assumed accessories and the specified weights, abbreviations and image data. The weight correspondence table is an example of a list of specified weights.

[0036] For example, the memory 41 stores "syringe pump", "drain bag", "animal urine bag", "bedside monitor", "medical oxygen cylinder", "backboard", and "infusion" as the names of the assumed accessories respectively. The assumed accessories may be set independently according to the characteristics of the facility where the X-ray CT apparatus 1 is installed.

[0037] The memory 41 stores abbreviations, image data, and weights corresponding to the assumed accessories of these names. The abbreviations of "syringe pump", "drain bag", "animal urine bag", "bedside monitor", "medical oxygen cylinder", "backboard", and "infusion" are "SP", "DB", "LU", "SM", "OB", "BB", and "LT" respectively. The image data is data showing the appearance of each assumed accessory.

[0038] For example, the memory 41 stores the weight of the "syringe pump" as 〇〇 (g) and the weight of the "drain bag" as ×× (g). The memory 41 stores a plurality of specified weights of the assumed accessories. The memory 41 is an example of a storage unit. The accessory is an example of an object. The weight of the assumed accessory is a fixed numerical value.

[0039] The syringe pump is a device used when it is desired to strictly control the injection rate of a drug. The syringe pump may be temporarily powered off and placed on the top plate 33 for imaging by the X-ray CT apparatus 1 (hereinafter referred to as CT imaging). The number of syringe pumps mounted on the top plate 33 may vary depending on the subject P.

[0040] The drainage bag is a device for discharging the body fluid of the subject P to the outside of the body. Since the tube provided in the drainage bag is short, the drainage bag may be mounted on the top plate 33 when the subject P is subjected to imaging diagnosis by the X-ray CT apparatus 1. The livestock urine bag is a bag for storing the urine discharged from the patient. The livestock urine bag may be mounted on the top plate 33 when the subject P is subjected to imaging diagnosis by the X-ray CT apparatus 1.

[0041] The bedside monitor is a monitor that displays the measurement results of the electrocardiogram, blood oxygen concentration, respiration, blood pressure, etc. of the subject P. The bedside monitor may be attached to, for example, the subject P under centralized management, and is often mounted on the top plate 33 of the X-ray CT apparatus 1. The medical oxygen cylinder is a cylinder that stores the oxygen supplied to the subject P. As a medical cylinder, for example, there is one used by the subject P with a respiratory disease when going out, and it is used by being connected to the mask worn by the subject P. When performing CT imaging, the oxygen cylinder connected to the mask worn by the subject P is switched to the oxygen cylinder installed in the examination room, but the medical oxygen cylinder may also be used as it is. In this case, the medical oxygen cylinder is, for example, mounted on the top plate 33.

[0042] The backboard is a board for fixing the subject P used in high-energy injuries such as traffic accidents. The subject P who has suffered a high-energy injury and is urgently transported is transported, for example, in a state of being fixed to the backboard. The transported subject P moves, for example, with the backboard attached to the top plate 33 of the bed device 30.

[0043] The infusion is a so-called drip, which is a bag containing the drug solution to be injected into the subject P. The infusion is, for example, suspended on a so-called drip stand, and during imaging diagnosis by the X-ray CT apparatus 1, the drip stand is attached to the bed device 30. For this reason, the infusion suspended on the drip stand also becomes an accessory mounted on the top plate 33. The weight of the infusion is the sum of the weight of the drug solution and the weight of the bag. The weights of the above accessories are, for example, all fixed values.

[0044] The display 42 displays, for example, a message for the operator before starting the image diagnosis by the X-ray CT apparatus 1. The display 42 displays, for example, the abbreviations, names, and weights of the assumed accessories mounted on the top plate 33, the weight of the measured subject P, and the like. The display 42 is an example of a display unit.

[0045] The processing circuit 50 controls the overall operation of the X-ray CT apparatus 1. The processing circuit 50 includes, for example, a control function 51, a preprocessing function 52, a reconstruction processing function 53, an image processing function 54, a first acquisition function 55, a recognition function 56, a second acquisition function 57, a calculation function 58, and a display control function 59. The processing circuit 50 realizes these functions, for example, by executing a program stored in a storage device (storage circuit) by a hardware processor.

[0046] The hardware processor means, for example, a circuit such as a CPU, a GPU, an application-specific integrated circuit, a programmable logic device or a complex programmable logic device, a field programmable gate array, or the like. Instead of storing the program in the storage device, the program may be directly incorporated into the circuit of the hardware processor. The hardware processor is not limited to being configured as a single circuit, and may be configured as one hardware processor by combining a plurality of independent circuits so as to realize each function. The storage device may be a non-temporary (hardware) storage medium. Also, a plurality of components may be integrated into one hardware processor to realize each function.

[0047] Each component included in the console device 40 or the processing circuit 50 may be realized by being decentralized and implemented by a plurality of hardware. The processing circuit 50 may be realized not by a configuration included in the console device 40 but by a processing device that can communicate with the console device 40. The processing device is, for example, a workstation connected to one X-ray CT apparatus, or a device (for example, a cloud server) connected to a plurality of X-ray CT apparatuses and executing the same processing as the processing circuit 50 described below in a batch.

[0048] Each function included in the processing circuit 50 may be distributed among a plurality of circuits, or may be made available by activating application software stored in the memory 41. For example, a control function 51, a preprocessing function 52, a reconstruction processing function 53, and an image processing function 54 are included in the processing circuit 50, and a first acquisition function 55, a recognition function 56, a second acquisition function 57, a calculation function 58, and a display control function 59 may be made available by activating application software stored in the memory 41.

[0049] The control function 51 controls various functions of the processing circuit 50 based on an input operation received by the input interface 43. For example, the control function 51 controls the X-ray high voltage device 14, the DAS 16, the control device 18, and the bed driving device 32 to execute a detection data collection process or the like in the gantry device 10.

[0050] The preprocessing function 52 performs preprocessing such as logarithmic conversion processing, offset correction processing, sensitivity correction processing between channels, and beam hardening correction on the detection data output by the DAS 16, generates projection data, and stores the generated projection data in the memory 41.

[0051] The reconstruction processing function 53 performs a reconstruction process on the projection data generated by the preprocessing function 52 by a method such as a filtered backprojection method or a successive approximation reconstruction method to generate CT image data, and stores the generated CT image data in the memory 41.

[0052] The image processing function 54 converts CT image data into three-dimensional image data or cross-sectional image data of an arbitrary cross-section by a known method based on an input operation received by the input interface 43. The conversion into three-dimensional image data may be performed by the preprocessing function 52.

[0053] The first acquisition function 55 receives the detection values respectively transmitted by the first load sensor 35A and the second load sensor 35B of the load sensor 35. Based on the received detection values, the first acquisition function 55 calculates and acquires the load applied to the entire top plate 33 (hereinafter referred to as the total load). The first acquisition function 55 outputs the acquired total load to the calculation function 58 and the display control function 59. The first acquisition function is an example of the first acquisition unit.

[0054] The recognition function 56 receives the electrical signal of the image transmitted by the camera unit 20. The recognition function 56 recognizes the assumed accessory (hereinafter referred to as the mounted accessory) mounted on the top plate 33 by performing image processing on the image based on the received electrical signal. The recognition function 56 outputs the accessory information corresponding to the recognized mounted accessory to the second acquisition function 57. The recognition function 56 is an example of the recognition unit.

[0055] The second acquisition function 57 refers to the weight correspondence table shown in FIG. 2 stored in the memory 41 for the accessory information output by the recognition function 56, and acquires the name, image data, and specified weight of the accessory corresponding to the accessory information. The second acquisition function 57 outputs the acquired accessory name and image data to the display control function 59. The second acquisition function 57 outputs the acquired specified weight to the calculation function 58 and the display control function 59. The second acquisition function 57 is an example of the second acquisition unit.

[0056] The calculation function 58 calculates the weight of the subject P based on the total load output by the first acquisition function 55 and the specified weight of the accessory. For example, the calculation function 58 calculates the weight of the subject P by calculating, as the measurement result of the weight of the subject P, a value obtained by subtracting the total weight obtained by adding the specified weights of all the mounted accessories from the total load. The calculation function 58 is an example of the calculation unit.

[0057] The calculation function 58 further calculates the dosage of the contrast agent to be administered to the subject P based on the calculated weight of the subject P. The dosage of the contrast agent is calculated, for example, using a mathematical formula with the weight of the subject P as a variable. The dosage of the contrast agent may be predefined according to the weight of the subject P. The calculation function 58 outputs the calculated weight of the subject P and the dosage of the contrast agent to be administered to the subject P to the display control function 59.

[0058] The display control function 59 performs control to display, on the display 42, the name of the accessory, the image data, and the specified weight output by the second acquisition function 57, and an image showing the weight of the subject P and the dosage of the contrast agent to be administered to the subject P output by the calculation function 58. FIG. 3 is a diagram showing an example of an image displayed on the display 42 before starting the image diagnosis.

[0059] Before starting the image diagnosis by the X-ray CT apparatus 1, the display control function 59 performs control to display a message field GA1, an accessory weight display field GA2, a subject weight display field GA3, and a contrast agent dosage display field GA4 on the display 42. The display control function 59 displays a predetermined message, here a message "Preparing for imaging. Please confirm the weight of the subject and the dosage of the contrast agent.", in the message field GA1.

[0060] The display control function 59 displays, in the accessory weight display field GA2, the abbreviation, image, and weight of the mounted accessory on the display 42. Regarding the weight of the mounted accessory, when there are a plurality of mounted accessories, the individual weights of each mounted accessory and the total weight of all mounted accessories are displayed. The display control function 59 displays the weight of the subject P in the subject weight display field GA3. The display control function 59 displays the dosage of the contrast agent to be administered to the subject P in the contrast agent dosage display field GA4. The display control function 59 is an example of a display control unit.

[0061] Next, the processing in the stage before the image diagnosis by the X-ray CT apparatus 1 is described. FIG. 4 is a flowchart showing an example of the processing in the stage before the image diagnosis by the X-ray CT apparatus 1. In the X-ray CT apparatus 1, as the processing in the stage before the image diagnosis, first, the subject P is placed on the top plate 33 of the bed apparatus 30 (step S1).

[0062] Subsequently, when the subject is placed on the top plate 33, the camera unit 20 images the top plate 33 (step S3). The camera unit 20 transmits an electrical signal of an image including the imaged accessory to the processing circuit 50 of the console apparatus 40. FIG. 5 is a diagram showing an example of a state of imaging the top plate 33 with a camera.

[0063] Among the camera units 20 provided in the gantry apparatus 10, the first camera 21 is equipped near the upper end portion of the gantry apparatus 10, and the second camera 22 is equipped near one side end portion of the gantry apparatus 10, for example, the left side end portion. The first camera 21 images the top plate 33 from above, and the second camera 22 images the upper portion of the top plate 33 from the side. The first accessory F1 and the second accessory F2, etc. around the subject P are detected from the images captured by the first camera 21 and the second camera 22.

[0064] Subsequently, the load sensor 35 detects the load applied to the bed by each of the first load sensor 35A and the second load sensor 35B (step S5). Subsequently, the load sensor 35 transmits an electrical signal of the load detected by the first load sensor 35A and the second load sensor 35B to the processing circuit 50 of the console apparatus 40.

[0065] The processing circuit 50 of the console apparatus 40 calculates the weight of the subject P using the image based on the electrical signal transmitted by the camera unit 20 and the load indicated by the electrical signal transmitted by the load sensor 35 (step S7). The procedure for calculating the weight of the subject P will be described later. After calculating the weight of the subject P, the calculation function 58 obtains the amount of the contrast agent to be administered to the subject P based on the calculated weight of the subject P (step S9).

[0066] Subsequently, the calculation function 58 outputs the calculated amount of the contrast agent to be administered to the subject P to the display control function 59. The display control function 59 displays the amount of the contrast agent to be administered to the subject P output by the calculation function 58 together with the weight of the subject P on the display 42 (step S11). Thereafter, the X-ray CT apparatus 1 ends the process shown in FIG. 4.

[0067] Next, a procedure for calculating the weight of the subject P in step S7 will be described. FIG. 6 is a flowchart showing an example of a procedure for calculating the weight of the subject P. The first acquisition function 55 in the processing circuit 50 receives the electrical signals of the loads detected by the first load sensor 35A and the second load sensor 35B transmitted by the load sensor 35 (step S101). Subsequently, the first acquisition function 55 acquires the total load based on the load indicated by the received electrical signal (step S103). The first acquisition function 55 outputs the acquired total load to the second acquisition function 57 (step S105).

[0068] Subsequently, the recognition function 56 receives the electrical signal of the image transmitted by the camera unit 20 (step S107). The recognition function 56 performs, for example, template matching on the image based on the received electrical signal, and recognizes the mounted accessories included in the image (step S109). When the recognition function 56 can recognize the mounted accessories, the accessory information is output to the second acquisition function 57 (step S111).

[0069] Subsequently, the second acquisition function 57 refers to the weight correspondence table stored in the memory 41 for the accessory information output by the recognition function 56, and acquires the name, image data, and specified weight of the mounted accessory corresponding to the accessory information (step S113). Subsequently, the second acquisition function 57 outputs the acquired name and image data of the mounted accessory to the display control function 59. The second acquisition function 57 outputs the acquired specified weight to the calculation function 58 and the display control function 59.

[0070] Subsequently, the calculation function 58 adds up all the specified weights output by the second acquisition function 57 to calculate the total weight of the mounted accessories (step S115). Subsequently, the calculation function 58 calculates the weight of the subject P by correcting the overall load output by the first acquisition function 55 based on the total weight of the mounted accessories. For example, the calculation function 58 calculates the weight of the subject P by subtracting the calculated total weight of the mounted accessories from the overall load output by the first acquisition function 55 (step S117).

[0071] The calculation function 58 outputs the calculated total weight of the mounted accessories and the calculated weight of the subject P to the display control function 59. The display control function 59 displays, on the display 42, an image showing the name, image data, and specified weight of the mounted accessories output by the second acquisition function 57 and the weight of the subject P output by the calculation function 58 (step S119). Thereafter, the X-ray CT apparatus 1 ends the process shown in FIG. 6.

[0072] When measuring the weight of the subject P, the X-ray CT apparatus 1 according to the first embodiment detects the mounted accessories mounted on the top plate 33 and corrects the overall load applied to the top plate 33 based on the weight of the detected mounted accessories. Therefore, even when an accessory is mounted on the top plate 33, the weight of the subject P placed on the top plate 33 can be accurately measured.

[0073] (Second Embodiment) Next, a second embodiment will be described. The second embodiment is mainly different from the first embodiment in that the processing circuit 50 of the X-ray CT apparatus 1 includes a determination function 60 for determining whether the weight of the mounted accessories is accurate. Further, the second embodiment is different from the first embodiment in that the mounted accessories and their weights can be input by operating the input interface 43. Hereinafter, the second embodiment will be described centering on the differences from the first embodiment. The description of the common elements and the like with the first embodiment may be omitted. The same applies to the following other embodiments.

[0074] FIG. 7 is a diagram showing an example of the processing circuit 50 in the X-ray CT apparatus 1 according to the second embodiment. The processing circuit 50 includes a determination function 60 in addition to the control function 51 to the display control function 59 in the first embodiment. The recognition function 56 recognizes the attached accessories based on the image transmitted by the camera unit 20, and outputs the accessory information of the recognized attached accessories to the determination function 60.

[0075] The determination function 60 determines whether an accessory whose weight is not determined, for example, an accessory whose specified weight is variable (hereinafter referred to as a variable accessory), is included in the attached accessories. The determination function 60 is an example of a determination unit. In the following description, an assumed accessory whose specified weight is variable is referred to as a variable accessory, while an assumed accessory whose specified weight is invariable is referred to as an invariable accessory.

[0076] The weight correspondence table stored in the memory 41 of the X-ray CT apparatus 1 according to the second embodiment is different from the weight correspondence table in the first embodiment. FIG. 8 is a diagram showing an example of the content of the weight correspondence table according to the second embodiment. The weight correspondence table according to the second embodiment further includes information on whether the assumed accessory is variable or invariable.

[0077] Specifically, the weights of the "syringe pump", "drain bag", "urine collection bag", "medical oxygen cylinder", "backboard", and "infusion" may change depending on the state of the subject P and the like. Therefore, the specified weights of these assumed accessories are variable. Thus, the "syringe pump", "drain bag", "urine collection bag", "medical oxygen cylinder", "backboard", and "infusion" correspond to variable accessories. The weights of the "bedside monitor" and "backboard" are constant regardless of the state of the subject P and the like. Therefore, the specified weights of these assumed accessories are invariable. Thus, the "bedside monitor" and "backboard" correspond to invariable accessories.

[0078] When the determination function 60 determines that the variable accessory is included in the mounted accessories, the determination function 60 outputs warning information to the display control function 59 to warn that the weight of the subject cannot be calculated because the variable accessory is included in the mounted accessories. When the warning information is output, the display control function 59 displays a warning image on the display 42. The warning image also includes an image indicating that the input of the weight of the variable accessory is promoted. The warning image is an example of warning display.

[0079] FIG. 9 is a diagram showing an example of the warning image displayed on the display 42. In the warning image, the display control function 59 displays a message "Warning" in the message field GA1, and also displays a message "Since the weight of the drain bag (DB) mounted on the bed is unknown, the body weight cannot be measured. Please enter the weight." in the message field GA1. The "drain bag (DB)" displayed in the message field GA1 is an example of the second specific information. The "Since the weight of the drain bag (DB) is unknown" displayed in the message field GA1 is an example of the reason information indicating the reason why the weight of the object is determined to be inaccurate.

[0080] As the weight of the mounted accessories to be displayed in the accessory weight display column GA2, for example, for the drain bag (DB) which is a variable accessory, the display control function 59 displays an image prompting the input, and for the bedside monitor (SM) which is a fixed accessory, the display control function 59 displays the weight indicated by the weight correspondence table. The display control function 59 displays a "-" which is indefinite until the weight of the fixed accessory is input in the total weight column. Similarly, the display control function 59 displays a "-" which is indefinite until the weight of the fixed accessory is input in the subject weight display column GA3 and the contrast agent amount display column GA4.

[0081] The display control function 59 may display a table (hereinafter referred to as the variable attachment weight correspondence table) that associates the cause of the weight variation of the variable attachment with the weight of the variable attachment in the warning image. FIG. 10 is a diagram showing an example of the variable attachment weight correspondence table. The cause of the variable attachment shown in the variable attachment weight correspondence table is, for example, the amount of the drug when the variable counterpart is a syringe pump, the amount of body fluid when the variable counterpart is a drain bag, and the amount of urine when the variable counterpart is a livestock urine bag. When the display control function 59 displays the variable attachment weight correspondence table on the display 42, it may display the entire variable attachment weight correspondence table or only the part corresponding to the mounted attachment.

[0082] In the X-ray CT apparatus 1 according to the second embodiment, the input interface 43 receives an input operation for inputting information such as the name of the assumed attachment (hereinafter referred to as the specified information) for designating the mounted attachment by the operator and information such as the weight of the mounted attachment. For example, before starting the image diagnosis by the X-ray CT apparatus 1, it is assumed that the operator visually confirms that the mounted attachment is not included in the image captured by the camera unit 20.

[0083] In this case, the camera unit 20 may repeat imaging until the recognition function 56 recognizes the mounted attachment, or the operator may perform an input operation for the specified information on the input interface 43. The specified information is an example of the first specific information. The first specific information may be other than the name of the assumed attachment, and may be, for example, a serial number assigned to each assumed attachment. The input interface 43 is an example of the first reception unit and the second reception unit.

[0084] The operator compares, for example, the image displayed on the display 42 shown in FIG. 3 with the mounted attachments actually mounted on the top plate 33, and confirms that all the mounted attachments actually mounted on the top plate 33 are displayed on the display 42. When the operator confirms that there is a mounted attachment that is actually mounted on the top plate 33 but not displayed on the display 42, the operator performs an input operation for designating the mounted attachment.

[0085] When the input interface 43 receives an input operation of specified information, it outputs an electrical signal indicating the received specified information to the processing circuit 50. Based on the output electrical signal, the processing circuit 50 recognizes the mounted accessory by the recognition function 56 and outputs accessory information corresponding to the recognized mounted accessory to the second acquisition function 57 and the determination function 60.

[0086] When the determination function 60 determines that the mounted accessory does not include a variable accessory, similar to the first embodiment, the second acquisition function 57 refers to the weight correspondence table for the accessory information of the invariant accessory output by the recognition function 56 to obtain the specified weight corresponding to the accessory information. When the determination function 60 determines that the mounted accessory includes a variable accessory, the input interface 43 receives an input operation for inputting information (hereinafter referred to as weight information) specifying the weight of the mounted accessory.

[0087] When the input interface 43 receives an input operation of weight information, it outputs an electrical signal indicating the received weight information to the processing circuit 50. Based on the output electrical signal, the second acquisition function 57 of the processing circuit 50 obtains the weight specified by the operator through the input operation as the weight of the mounted accessory.

[0088] The operator further compares the image displayed on the display 42 shown in FIG. 3 with the mounted accessories actually mounted on the top plate 33 to confirm whether there are any accessories other than the assumed accessories (hereinafter referred to as unexpected accessories) mounted on the top plate 33. When the operator confirms that an unexpected accessory is mounted on the top plate 33, the operator performs an input operation to indicate that there is an unexpected accessory and specify the weight of the unexpected accessory.

[0089] Next, a procedure for calculating the weight of the subject P in the X-ray CT apparatus 1 of the second embodiment will be described. FIG. 11 is a flowchart showing an example of the procedure for calculating the weight of the subject P in the second embodiment. The processes from the process (step S201) in which the first acquisition function 55 receives the electrical signal of the load to the process (step S209) of recognizing the attachment information are common to the processes from step S101 to step S109 of the first embodiment. In step S211, when the recognition function 56 can recognize the mounted attachment, the recognition function 56 outputs the attachment information to both the second acquisition function 57 and the determination function 60.

[0090] Subsequently, the second acquisition function 57 refers to the weight correspondence table shown in FIG. 8 for the mounted attachment recognized by the recognition function 56 and acquires the name of the mounted attachment (step S213). Subsequently, the determination function 60 refers to the weight correspondence table shown in FIG. 8 for the mounted attachment recognized by the recognition function 56 and determines whether a variable attachment is included in the mounted attachment (step S215).

[0091] When the determination function 60 determines that a variable attachment is included, the display control function 59 displays a warning image for promoting the input of the weight of the variable attachment on the display 42 (step S217). The operator who sees the warning image estimates the weight of the variable attachment. For example, when the variable attachment is a drain bag, the amount of body fluid contained in the drain bag is visually observed, and the weight of the drain bag is estimated from the amount of body fluid. The operator performs an input operation to input the estimated weight of the drain bag.

[0092] Subsequently, the second acquisition function 57 determines whether there has been an input operation for the weight of the variable attachment within a specified time (step S219). When there has been an input operation for the weight of the variable attachment within the specified time, the second acquisition function 57 acquires the weight corresponding to the input operation as the weight of the variable attachment (step S221). When there has been no input operation within the specified time, the second acquisition function 57 acquires the specified weight shown in the weight correspondence table as the weight of the variable attachment (step S223).

[0093] Similarly, even when it is determined in step S215 that no variable accessory is included, the second acquisition function 57 acquires the specified weight shown in the weight correspondence table as the weight of the mounted accessory (step S223). Subsequently, the second acquisition function 57 outputs the name and image data of the acquired mounted accessory to the display control function 59. The second acquisition function 57 outputs the acquired specified weight to the calculation function 58 and the display control function 59.

[0094] Subsequently, the calculation function 58 adds up all the specified weights output by the second acquisition function 57 to calculate the total weight of the mounted accessories (step S225). Subsequently, the calculation function 58 subtracts the total weight of the calculated mounted accessories from the overall load output by the first acquisition function 55 to calculate the weight of the subject P (step S227).

[0095] The calculation function 58 outputs the calculated total weight of the mounted accessories and the calculated weight of the subject P to the display control function 59. The display control function 59 displays a confirmation image showing the name, image data, and specified weight of the mounted accessory output by the second acquisition function 57 and the weight of the subject P output by the calculation function 58 on the display 42 (step S229).

[0096] FIG. 12 is a diagram showing an example of the confirmation image displayed on the display 42. Here, the display control function 59 displays a message "Please confirm the weight of the contrast agent of the subject. If the weight of the mounted object is different or there is another mounted object, please press the correction button. If it is correct, please press the confirmation button." in the message field GA1.

[0097] The display control function 59 displays the individual weights of the mounted accessories and the total weight of all the mounted accessories in the accessory weight display column GA2, the weight of the subject P in the subject weight display column GA3, and the amount of the contrast agent administered to the subject P in the contrast agent amount display column GA4, respectively. The display control function 59 further displays a correction button GA5 and an OK button GA6 on the display 42. The correction button GA5 is a GUI image on which the character "Correction" is displayed, and the OK button GA6 is a GUI image on which the character "OK" is displayed.

[0098] When the operator performs an input operation on the correction button GA5, the input interface 43 receives the input operation of the operator. When the input interface 43 receives the input operation of the correction button GA5, it outputs an electrical signal corresponding to the input operation of the correction button GA5 to the processing circuit 50. When the operator performs an input operation on the OK button GA6, the input interface 43 receives the input operation of the operator. When the input interface 43 receives the input operation of the OK button GA6, it outputs an electrical signal corresponding to the input operation of the OK button GA6 to the processing circuit 50.

[0099] After displaying the confirmation image, the display control function 59 determines whether there has been an input operation on the OK button GA6 based on whether it has received the electrical signal of the input operation on the OK button GA6 (step S231). If it is determined that there has been no input operation on the OK button, the display control function 59 determines whether there has been an input operation on the correction button GA5 (step S235). If it is determined that there has been no input operation on the correction button GA5, the display control function 59 returns to the process of step S231 and repeats the processes of step S231 and step S233 until an input operation on either the correction button GA5 or the OK button GA6 is executed.

[0100] If it is determined that there has been an input operation on the correction button GA5, the display control function 59 proceeds to the process of step S217 and displays a warning image on the display 42. The warning image displayed after the input operation on the correction button GA5 is different from the warning image displayed after it is determined that the mounted accessories include variable accessories.

[0101] FIG. 13 is a diagram showing an example of an image displayed on the display 42 after an input operation of the correction button GA5. Here, the display control function 59 displays a message "Please correct the weight. When other objects are placed on the bed, please add the objects." in the message field GA1. The display control function 59 indicates that the weight of the variable accessory is surrounded by the first frame GA21 for the individual weight of the mounted accessory in the accessory weight display column GA2, indicating that it is a weight that can be corrected. Further, when the mounted accessory is an accessory other than the assumed accessory, the second frame GA22 is displayed in the accessory weight display column GA2 as a field for inputting the weight thereof.

[0102] When the operator performs a weight input operation on the first frame GA21 and the second frame GA22, the input interface 43 receives the input operation of the operator. The input interface 43 outputs an electrical signal corresponding to the weight information input to the first frame GA21 and the second frame GA22 to the processing circuit 50. After the display control function 59 displays a warning image, the second acquisition function 57 determines whether there has been an input operation for the weight of the variable accessory within a specified time (step S219), and thereafter executes the above-described processing. In step S219, if there has been no input operation to the second frame GA22 within the specified time, the second frame GA22 is erased and the process proceeds to step S225.

[0103] In step S231, when it is determined that there has been an input operation of the confirmation button GA6, the X-ray CT apparatus 1 determines the weight of the subject P (step S233). Thereafter, the X-ray CT apparatus 1 ends the processing shown in FIG. 11.

[0104] The X-ray CT apparatus 1 according to the second embodiment exhibits the same operational effects as the X-ray CT apparatus 1 according to the first embodiment. Further, in the X-ray CT apparatus 1 according to the second embodiment, the attached accessory is a variable accessory, and when the weight of the subject P cannot be measured, warning information is displayed to prompt the input of the weight of the variable accessory. Further, when an accessory other than the assumed accessory is mounted on the top plate 33, the input of the weight of the accessory other than the assumed accessory is promoted. For this reason, the weight of the mounted accessory can be accurately recognized, so that the weight of the subject P can be measured more accurately.

[0105] (Third Embodiment) Next, the third embodiment will be described. The X-ray CT apparatus 1 according to the third embodiment is mainly different from the first embodiment in terms of the processing before placing the subject P on the bed and the handling of the information obtained by the processing before placing the subject P on the bed. Hereinafter, the third embodiment will be described centering on the differences from the first embodiment.

[0106] In the X-ray CT apparatus 1 (see FIG. 1) according to the third embodiment, a headrest and a footrest (hereinafter, referred to as the headrest etc.) are detachably attached to the top plate 33. When performing image diagnosis using the X-ray CT apparatus 1, a work for preparing for diagnosis (hereinafter, diagnosis preparation work) of attaching or detaching the headrest etc. to or from the top plate 33 according to the body shape etc. of the subject P is performed. The diagnosis preparation work is performed before the subject P is placed on the top plate 33. In the diagnosis preparation work, the attachment and detachment work of the headrest etc. is performed as necessary, and the attachment and detachment work of the headrest etc. when it is unnecessary is not performed. The headrest etc. become accessories (hereinafter, pre-mounted items) mounted on the top plate 33 before the subject P is placed on the top plate 33.

[0107] In the X-ray CT apparatus 1 according to the third embodiment, before the subject P is placed on the top plate 33, the objects mounted on the top plate 33 are recognized. When calculating the weight of the subject P, the X-ray CT apparatus 1 uses the information of the recognized objects. Hereinafter, the processing in the X-ray CT apparatus 1 according to the third embodiment will be described. FIG. 14 is a flowchart showing an example of the processing at a stage before the image diagnosis is performed by the X-ray CT apparatus 1 according to the third embodiment.

[0108] When performing image diagnosis by the X-ray CT apparatus 1, the operator executes diagnostic preparation work (step S21). In the diagnostic preparation work, the headrest or the like is attached or detached according to the body shape of the subject to be subjected to image diagnosis. Subsequently, the camera unit 20 captures an image of the top plate 33 before the subject P is placed on the top plate 33 (hereinafter, a pre-image) (step S23).

[0109] When the headrest or the like is attached during the diagnostic preparation work, the headrest or the like is included in the image of the top plate 33 captured on the top plate 33. When the headrest or the like is removed during the diagnostic preparation work, the headrest or the like is not included in the image of the top plate 33 captured on the top plate 33. The image of the top plate 33 captured here is an image that does not include the subject P. The camera unit 20 transmits the electrical signal of the captured image to the processing circuit 50 of the console device 40.

[0110] Subsequently, the load sensor 35 detects the load (hereinafter, pre-load) applied to the bed before the subject P is placed on the top plate 33 by each of the first load sensor 35A and the second load sensor 35B (step S25). The load sensor 35 transmits the electrical signal of the load detected by the first load sensor 35A and the second load sensor 35B to the processing circuit 50 of the console device 40. Subsequently, the subject P is placed on the top plate 33 in the bed device 30 (step S27).

[0111] Subsequently, in the same manner as in the first embodiment described above, when the subject is placed on the top plate 33, the camera unit 20 images the area above the top plate 33 (step S29), and transmits an electrical signal of the image including the attachment captured to the processing circuit 50 of the console device 40. The load sensor 35 detects the pre-load by each of the first load sensor 35A and the second load sensor 35B (step S31), and transmits an electrical signal of the detected load to the processing circuit 50 of the console device 40.

[0112] Based on the images before and after placing the subject P based on the electrical signal transmitted by the camera unit 20 and the loads before and after placing the subject P indicated by the electrical signal transmitted by the load sensor 35, the processing circuit 50 of the console device 40 calculates the weight of the subject P (step S33). The procedure for calculating the weight of the subject P will be described later. After calculating the weight of the subject P, the calculation function 58 determines the amount of the contrast agent to be administered to the subject P based on the calculated weight of the subject P (step S35). Subsequently, the display control function 59 displays the amount of the contrast agent to be administered to the subject P on the display 42 (step S37). Thereafter, the X-ray CT apparatus 1 ends the processing shown in FIG. 14.

[0113] Subsequently, the procedure for calculating the weight of the subject P in the X-ray CT apparatus 1 of the third embodiment will be described. FIG. 15 is a flowchart showing an example of the procedure for calculating the weight of the subject P in the X-ray CT apparatus 1 of the third embodiment. First, in the first acquisition function 55, after the diagnostic preparation work is completed on the top plate 33, the X-ray CT apparatus 1 of the third embodiment receives an electrical signal of the pre-load transmitted by the load sensor 35 (step S301). Based on the electrical signal of the pre-load, the first acquisition function 55 calculates and acquires the load of the pre-mounted object (hereinafter, pre-mounted object load) after the diagnostic preparation work (step S303). The first acquisition function 55 outputs the acquired pre-mounted object load to the calculation function 58 (step S303).

[0114] Subsequently, the recognition function 56 receives the electrical signal of the pre-image transmitted by the camera unit 20 (step S305). The recognition function 56 recognizes the pre-mounted object included in the pre-image based on the received pre-image (step S307). The recognition function 56 outputs the pre-mounted object information corresponding to the recognized pre-mounted object to the calculation function 58 (step S307). The processing up to this point is the processing executed during the diagnostic preparation work.

[0115] Subsequently, after the diagnostic preparation work is completed, the subject P is placed on the top plate 33 of the bed device 30 (step S309). Subsequently, the camera unit 20 images the top plate 33 and transmits the electrical signal of the captured image to the processing circuit 50 (step S311). Subsequently, the load sensor 35 detects the load applied to the bed and transmits the electrical signal of the detected load to the processing circuit 50 of the console device 40 (step S311). The processing from step S309 to step S311 is common to the processing from step S1 to step S5 of the first embodiment.

[0116] Subsequently, the first acquisition function 55 receives the electrical signal of the load detected by the load sensor 35 and acquires the total load based on the load indicated by the received electrical signal (step S313). The first acquisition function 55 outputs the acquired total load to the second acquisition function 57 (step S313). Subsequently, the recognition function 56 receives the electrical signal of the image transmitted by the camera unit 20 and recognizes the attached accessory included in the image based on the received electrical signal (step S315). When the recognition function 56 can recognize the attached accessory, it outputs the accessory information to the second acquisition function 57 (step S315).

[0117] Subsequently, the second acquisition function 57 acquires the name, image data, and specified weight of the mounted accessory corresponding to the accessory information output by the recognition function 56 (step S317), and outputs the acquired name and image data of the mounted accessory to the display control function 59. The second acquisition function 57 outputs the acquired specified weight to the calculation function 58 and the display control function 59. Subsequently, the calculation function 58 adds up all the specified weights output by the second acquisition function 57 to calculate the total weight of the mounted accessories (step S319). The processing up to this point is common to steps S101 to S115 of the first embodiment.

[0118] Subsequently, the calculation function 58 determines whether there is a pre-mounted object among the mounted accessories based on the pre-mounted object information output by the recognition function (step S321). If it is determined that there is a pre-mounted object, the calculation function 58 subtracts the pre-mounted object load from the total load (step S323). Subsequently, the calculation function 58 subtracts the total weight of the mounted accessories from the total load after subtracting the pre-mounted object load to calculate the total weight of the subject P (step S325). If it is determined that there is no pre-mounted object, the calculation function 58 subtracts the total weight of the mounted accessories from the total load to calculate the total weight of the subject P (step S325).

[0119] The calculation function 58 outputs the calculated total weight of the mounted accessories and the calculated weight of the subject P to the display control function 59. The display control function 59 displays an image showing the name, image data, and specified weight of the mounted accessory output by the second acquisition function 57 and the weight of the subject P output by the calculation function 58 on the display 42 (step S327). Thereafter, the X-ray CT apparatus 1 ends the process shown in FIG. 15.

[0120] The X-ray CT apparatus 1 of the third embodiment has the same operational effects as the X-ray CT apparatus 1 of the first embodiment. Furthermore, when there is a pre-mounted object, the X-ray CT apparatus 1 of the third embodiment subtracts the weight of the pre-mounted object to calculate the weight of the subject. Therefore, even when a headrest or the like is mounted on the top plate 33 as a pre-mounted object, the weight of the subject can be accurately measured.

[0121] Hereinafter, a modification example will be described. In the X-ray CT apparatus 1 of the modification example, as an image displayed on the display 42, the weight of the subject declared in advance (hereinafter referred to as the declared weight) may be displayed together with the weight of the subject. FIG. 16 is a diagram showing an example of a warning image including the declared information displayed on the display 42. In this example, a declared weight display column GA7 is provided between the subject weight display column GA3 and the contrast agent amount display column GA4, and the declared weight is displayed in the declared weight display column GA7. By displaying the declared weight, the operator can compare the declared weight with the subject weight, so that when an abnormality occurs in the measured subject weight, it is easier for the operator to recognize the abnormality.

[0122] As described above, a plurality of embodiments and modification examples from the first embodiment to the third embodiment have been described. However, each element of these embodiments and modification examples may be appropriately combined or replaced. Further, in each of the above embodiments, the X-ray CT apparatus 1 is exemplified as a medical image diagnostic apparatus, but the medical image diagnostic apparatus may be other apparatuses. As the medical image diagnostic apparatus, for example, a PET (positron emission tomography)-CT apparatus, an MRI (Magnetic Resonance Imaging) apparatus, an XR apparatus, an angiography detector, etc. may be used.

[0123] According to at least one of the embodiments described above, by having a first acquisition unit that acquires the load applied to the bed on which the subject to be imaged is placed, a recognition unit that recognizes an object mounted on the bed, a second acquisition unit that acquires the weight of the object, and a calculation unit that calculates the weight of the subject on the bed based on the load and the weight of the object, the weight of the subject placed on the bed can be accurately measured.

[0124] Although some embodiments have been described, these embodiments are presented by way of example and are not intended to limit the scope of the invention. These embodiments can be implemented in various other forms, and various omissions, replacements, and changes can be made without departing from the gist of the invention. These embodiments and their modifications are included in the scope and gist of the invention, as well as in the invention described in the claims and the equivalent scope thereof.

Explanation of Reference Numerals

[0125] 1…X-ray CT apparatus 10…Gantry device 11…X-ray tube 12…Wedge 13…Collimator 14…X-ray high voltage device 15…X-ray detector 16…DAS 17…Rotating frame 18…Control device 20…Camera unit 21…First camera 22…Second camera 30…Bed device 31…Base 32…Bed drive device 33…Top plate 34…Support frame 35…Load sensor 35A…First load sensor 35B…Second load sensor 40…Console device 41…Memory 42…Display 43…Input interface 50…Processing circuit 51…Control function 52…Preprocessing function 53…Reconstruction processing function 54…Image processing function 55…First acquisition function 56…Recognition function 57…Second acquisition function 58…Calculation function 59…Display control function 60…Judgment function F1…First accessory F2…Second accessory GA1…Message column GA2…Accessory weight display column GA3…Subject weight display column GA4…Contrast agent dosage display column GA5…Correction button GA6…Confirmation button GA7…Declared weight display column GA21…First frame GA22…Second frame P…Subject SM…Bedside monitor

Claims

1. A first acquisition unit that acquires the load applied to a bed on which a subject to be imaged is placed; A recognition unit that recognizes an object mounted on the bed; A second acquisition unit that acquires the weight of the object; A calculation unit that calculates the weight of the subject on the bed based on the load and the weight of the object; A display control unit that causes the display unit to display the weight of the subject calculated by the calculation unit, and includes: The display control unit further causes the display unit to display at least one of first identification information for identifying the object or the weight of the object acquired by the second acquisition unit; A list of specified weights of a plurality of objects that are assumed to be mounted on the bed during the imaging diagnosis includes information on whether the weight of the object is variable or invariable; The apparatus further includes a determination unit that determines whether the weight of the object recognized by the recognition unit is variable or invariable; When the determination unit determines that the weight of the object is variable, the display unit displays a warning; A medical imaging diagnostic apparatus.

2. The calculation unit further calculates the dosage of a contrast agent to be administered to the subject based on the weight of the subject; The display control unit further causes the display unit to display the dosage of the contrast agent; The medical imaging diagnostic apparatus according to claim 1.

3. The display control unit further causes the display unit to display a declared weight declared in advance by the subject as the weight of the subject; The medical imaging diagnostic apparatus according to claim 1 or 2.

4. The warning display is at least one of second identification information for identifying the object recognized by the recognition unit as having a variable weight or reason information indicating the reason for determining that the weight of the object is inaccurate; The medical imaging diagnostic apparatus according to any one of claims 1 to 3.

5. The apparatus further includes a first reception unit that receives an input of the first identification information for identifying the object; The medical imaging diagnostic apparatus according to any one of claims 1 to 4.

6. The apparatus further includes a second reception unit that receives an input of the weight of the object; The medical imaging diagnostic apparatus according to any one of claims 1 to 5.

7. The recognition unit recognizes the object based on an image captured by a camera that captures an image of the bed on which the subject is placed; The medical imaging diagnostic apparatus according to any one of claims 1 to 6.

8. The camera is disposed above the bed; The medical imaging diagnostic apparatus according to claim 7.

9. Before placing the subject on the bed, when there is a pre-mounted object mounted on the bed, the calculation unit calculates the weight of the subject based on the weight of the pre-mounted object as well. The medical imaging diagnostic apparatus according to any one of claims 1 to 8.

10. The pre-mounted object is at least one of a headrest or a footrest. The medical imaging diagnostic apparatus according to claim 9.

11. A computer of a medical imaging diagnostic apparatus acquires a load applied to a bed on which a subject to be imaged is placed, recognizes an object mounted on the bed, acquires the weight of the object, calculates the weight of the subject on the bed based on the load and the weight of the object, causes the calculated weight of the subject to be displayed on a display unit, the computer causes at least one of first identification information for identifying the object or the acquired weight of the object to be further displayed on the display unit, a list of specified weights of a plurality of objects that are assumed to be mounted on the bed during the imaging diagnosis includes information on whether the weight of the object is variable or invariable, the computer determines whether the weight of the recognized object is variable or invariable, and when it is determined that the weight of the object is variable, gives a warning display. A medical imaging diagnostic method.

12. Causing a computer of a medical imaging diagnostic apparatus to acquire a load applied to a bed on which a subject to be imaged is placed, to recognize an object mounted on the bed, to acquire the weight of the object, to calculate the weight of the subject on the bed based on the load and the weight of the object, to cause the calculated weight of the subject to be displayed on a display unit, the computer to cause at least one of first identification information for identifying the object or the acquired weight of the object to be further displayed on the display unit, a list of specified weights of a plurality of objects that are assumed to be mounted on the bed during the imaging diagnosis includes information on whether the weight of the object is variable or invariable, the computer to determine whether the weight of the recognized object is variable or invariable, and when it is determined that the weight of the object is variable, to cause a warning display. A program.

Images