JP2022081875A - X-ray computer tomography device and control method - Google Patents

Abstract

To provide an X-ray computer tomography device that can be operated at the time of outage and enables cost reduction.SOLUTION: An X-ray computer tomography device comprises a battery and a power control unit. The battery is mounted on at least one of a rotation unit including a rotation frame that supports an X-ray tube for generating an X ray and rotates along a circumferential direction of an aperture and a stationary unit including a stationary frame for rotatably supporting the rotation frame. On the basis of a state of a rack device including the rotation unit and the stationary unit, the power supply control unit controls power supply from the battery to a device mounted on the rotation frame and a device mounted on the stationary frame.SELECTED DRAWING: Figure 1

Description

The embodiments disclosed herein and in the drawings relate to an X-ray computer tomography apparatus and a control method.

Conventionally, an X-ray computer tomography apparatus (hereinafter referred to as an X-ray CT (Computed Tomography) apparatus) is connected to an external power source. As a result, the X-ray CT apparatus supplies electric power from an external power source to each unit in the X-ray CT apparatus. In addition, power is supplied to a unit (X-ray generator, X-ray tube, X-ray detector, data acquisition circuit (also referred to as DAS (Data Equipment System))) mounted on a rotating frame in an X-ray CT device. Therefore, an electrical unit such as a slip ring may be mounted on the X-ray CT device. Further, an uninterruptible power supply (hereinafter referred to as UPS (Uninterruptible Power Supply)) is separately connected to the X-ray CT device in order to supply power to the minimum necessary unit that requires power in the event of a power failure. Sometimes. In this case, due to the UPS and the wiring related to the UPS, the cost may increase and the size required when installing the X-ray CT device may be large.

Japanese Patent Application Laid-Open No. 2003-10167

One of the problems to be solved by the embodiments disclosed in the present specification and the drawings is to provide an X-ray computer tomography apparatus that can be operated in the event of a power failure and can reduce costs. However, the problems to be solved by the embodiments disclosed in the present specification and the drawings are not limited to the above problems. The problem corresponding to each effect by each configuration shown in the embodiment described later can be positioned as another problem.

The X-ray computer tomography apparatus according to the present embodiment includes a battery and a power supply control unit. The battery has a rotating portion that supports an X-ray tube that generates X-rays and rotates along the circumferential direction of the opening, and a fixed portion that includes a fixed frame that rotatably supports the rotating frame. It is installed in at least one. The power supply control unit receives power from the battery to the device mounted on the rotating frame and the device mounted on the fixed frame based on the state of the gantry device including the rotating portion and the fixed portion. Control the supply.

FIG. 1 is a diagram showing a configuration example of an X-ray CT system according to the first embodiment. FIG. 2 is a diagram showing an example of a charge point in which the first contact and the second contact can be contacted according to the first embodiment. FIG. 3 is a diagram showing an example of power transmission in a state of charge of the first battery and the second battery according to the first embodiment. FIG. 4 is a diagram showing an example of power transmission in a transport state of the gantry device according to the first embodiment. FIG. 5 is a diagram showing an example of power transmission in the standby state of the gantry device according to the first embodiment. FIG. 6 is a diagram showing an example of power transmission in an X-ray exposure state in a gantry device according to the first embodiment. FIG. 7 is a diagram showing a list of power supply destinations and power supply sources according to the state of the gantry device with respect to FIGS. 3 to 6 according to the first embodiment. FIG. 8 is a flowchart showing an example of the procedure of the power supply control process according to the first embodiment. FIG. 9 is a diagram showing an example of power transmission in a state of charge of a first battery according to a first modification of the first embodiment. FIG. 10 is a diagram showing an example of electric power transmission in a transport state of a gantry device according to a first modification of the first embodiment. FIG. 11 is a diagram showing an example of power transmission in the standby state of the gantry device according to the first modification of the first embodiment. FIG. 12 is a diagram showing an example of power transmission in an X-ray exposure state in a gantry device according to a first modification of the first embodiment. FIG. 13 is a diagram showing a list of power supply destinations and power supply sources according to the state of the gantry device with respect to FIGS. 9 to 12 according to the first modification of the first embodiment. FIG. 14 is a diagram showing an example of power transmission in a state of charge of a second battery according to a second modification of the embodiment. FIG. 15 is a diagram showing an example of power transmission in a transport state of the gantry device according to the second modification of the embodiment. FIG. 16 is a diagram showing an example of power transmission in the standby state and the exposure state of the gantry device according to the second modification of the embodiment. FIG. 17 is a diagram showing a list of power supply destinations and power supply sources according to the state of the gantry device with respect to FIGS. 14 to 16 according to the second modification of the embodiment. FIG. 18 is a diagram showing an example of a configuration of a fixed type X-ray CT device according to a second modification of the embodiment.

Hereinafter, embodiments of an X-ray computer tomography apparatus (hereinafter referred to as an X-ray CT (computed tomography) apparatus) and a control method will be described in detail with reference to the drawings. In the following embodiments, the parts with the same reference numerals perform the same operation, and duplicate description will be omitted as appropriate. Hereinafter, in order to make the description concrete, the X-ray CT device according to the embodiment is an X-ray computer tomography system (hereinafter referred to as an X-ray CT system) having various devices attached to the X-ray CT device. It shall be included.

(First Embodiment)
FIG. 1 is a diagram showing an example of an X-ray CT system 1 having a portable X-ray CT device 3 according to the present embodiment. The portable X-ray CT device 3 is, for example, an X-ray CT device that can be carried and can be imaged at a different place. As shown in FIG. 1, the X-ray CT system 1 according to the present embodiment includes an X-ray CT device 3, a network 4, and a server device 5. The network 4 is connected to the X-ray CT device 3 wirelessly or by wire. Further, the network 4 is wirelessly or wiredly connected to the server device 5 corresponding to the workstation. The server device 5 is used for reconstructing volume data based on projection data, generating a CT image based on volume data, and the like. Hereinafter, the server device 5 is referred to as an image generation device.

Further, the network 4 includes an image storage communication system (Picture Archiving and Communication Systems: PACS), a hospital information system (HIS), a radiological information system (HIS), a radiological information system (RIS), and the like. To. The network 4 corresponds to a communication network installed in and / or outside the hospital.

The image generator 5 is connected to the network 4. The image generation device 5 executes various image processing that puts a load on the terminal device 40 that functions as a console of the X-ray CT device 3 according to a user's instruction input via the X-ray CT device 3 or the terminal device 40. do. The image generation device 5 generates various medical images by the image processing. The image generation device 5 transmits the generated medical image to the X-ray CT device 3 and the terminal device 40 according to the user's instruction input via the X-ray CT device 3 and the terminal device 40. Various image processes executed by the image generation device 5 will be described later. The various functions executed by the image generation device 5 and the terminal device 40 may be realized as a console device. At this time, the console device is included in the X-ray CT device 3. Further, various functions in the image generation device 5 may be mounted on the server device in the PACS, for example.

The X-ray CT device 3 includes a gantry device 10 which is also called a gantry, a sleeper device 30, and a terminal device 40 which can be carried by a user. In the present embodiment, the rotation axis of the rotation frame 13 in the non-tilt state or the longitudinal direction of the top plate 33 of the sleeper device 30 is orthogonal to the Z-axis direction and the Z-axis direction, and is horizontal to the floor surface. Is orthogonal to the X-axis direction and the Z-axis direction, and the axial direction perpendicular to the floor surface is defined as the Y-axis direction, respectively. In FIG. 1, a plurality of gantry devices 10 are drawn for convenience of explanation, but in the actual configuration of the X-ray CT system 1, the gantry device 10 is one.

The gantry device 10 and the sleeper device 30 operate based on an operation from the user via the terminal device 40, or an operation from the user via the gantry device 10 or the operation unit provided in the sleeper device 30. The gantry device 10, the sleeper device 30, and the terminal device 40 are wirelessly connected to each other so as to be able to communicate with each other.

The gantry device 10 is a device having an imaging system that irradiates the subject P with X-rays and collects projection data from the detection data of the X-rays transmitted through the subject P. The gantry device 10 includes an X-ray tube 11 (X-ray generator), a wedge 16, a collimator 17, an X-ray detector 12, an X-ray high voltage device 14, a DAS (Data Operation System) 18, and a rotating frame. A rotating part including 13, a control device 15, a first battery 20, a first power detector 21, a fixed part including a fixed frame 22 that rotatably supports the rotating frame 13, and a second battery. It has a contact drive mechanism 24, a first contact 241 and a second contact 242, a connector 243, a second power detector 25, and a moving fixing mechanism 26. The gantry device 10 includes a rotating portion and a fixing portion.

The X-ray tube 11 is a vacuum tube that 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 and supplying a filament current. Is. X-rays are generated when thermions collide with the target. The X-rays generated at the focal point of the X-ray tube 11 are formed into a cone beam shape through, for example, a collimator 17, and are applied to the subject P. For example, the X-ray tube 11 has a rotating anode type X-ray tube that generates X-rays by irradiating a rotating anode with thermions.

The X-ray detector 12 detects X-rays irradiated from the X-ray tube 11 and passed through the subject P, and outputs an electric signal corresponding to the X-ray dose to the DAS 18. The X-ray detector 12 has, for example, a plurality of detection element trains in which a plurality of detection elements are arranged in the channel direction along one arc centering on the focal point of the X-ray tube 11. The X-ray detector 12 has, for example, a structure in which a plurality of detection element rows are arranged in a slice direction (row direction, row direction). In the X-ray CT system 1, a Rotate / Rotate-Type (third generation CT) in which an X-ray tube 11 and an X-ray detector 12 rotate around the subject P as a unit is arrayed in a ring shape. There are various types such as Stationary / Rotate-Type (4th generation CT) in which a large number of X-ray detection elements are fixed and only the X-ray tube 11 rotates around the subject P. Applicable.

Further, the X-ray detector 12 is an indirect conversion type detector having, for example, a grid, a scintillator array, and an optical sensor array. The scintillator array has a plurality of scintillators, and the scintillator has a scintillator crystal that outputs a photon amount of light according to an incident X dose. The grid is arranged on the surface of the scintillator array on the X-ray incident side and has an X-ray shielding plate having a function of absorbing scattered X-rays. The grid may also be called a collimator (one-dimensional collimator or two-dimensional collimator). The optical sensor array has a function of converting into an electric signal according to the amount of light from the scintillator, and has, for example, an optical sensor such as a photomultiplier tube (PMT). The X-ray detector 12 may be a direct conversion type detector having a semiconductor element that converts incident X-rays into an electric signal. Further, the X-ray detector 12 may be a photon counting type X-ray detector. The X-ray detector 12 is an example of an X-ray detector.

The rotating portion includes a rotating frame that supports the X-ray tube 11 that generates X-rays and rotates along the circumferential direction of the opening. The rotating frame 13 rotatably supports the X-ray tube 11 and the X-ray detector 12 around a rotation axis. Specifically, the rotating frame 13 is an annular frame in which the X-ray tube 11 and the X-ray detector 12 are opposed to each other and the X-ray tube 11 and the X-ray detector 12 are rotated by a control device 15 described later. Is. The rotating frame 13 is rotatably supported by a fixed frame 22 made of a metal such as aluminum. Specifically, the rotating frame 13 is connected to the edge of the fixed frame 22 via a bearing. The rotating frame 13 receives power from the drive mechanism of the control device 15 and rotates around a rotation axis at a constant angular velocity.

In addition to the X-ray tube 11 and the X-ray detector 12, the rotating frame 13 further supports the X-ray high voltage device 14, the DAS 18, the first battery 20, and the first power detector 21. .. Further, a first contact 241 electrically connected to the first battery 20 is mounted at a predetermined position of the rotating frame 13 facing the fixed frame 22. Such a rotating frame 13 is housed in a substantially cylindrical housing having an opening (bore) forming an imaging space. The central axis of the opening coincides with the axis of rotation of the rotating frame 13. The detection data generated by the DAS 18 is transmitted from a transmitter having a light emitting diode (LED) to a receiver having a photodiode provided in a non-rotating portion (for example, a fixed frame 22) of the gantry device 10 by optical communication. And transferred to the first processing circuit 36. The method of transmitting the detection data from the rotating frame 13 to the non-rotating portion of the gantry device 10 is not limited to the above-mentioned optical communication, and any method may be adopted as long as it is a non-contact type data transmission.

The X-ray high voltage device 14 has an electric circuit such as a transformer and a rectifier, and has a function of generating a high voltage applied to the X-ray tube 11 and a filament current supplied to the X-ray tube 11. It has a generator and an X-ray control device that controls an output voltage according to the X-rays emitted by the X-ray tube 11. The high voltage generator may be a transformer type or an inverter type.

The first battery 20 is mounted on the rotating portion. The first battery 20 includes an X-ray tube 11, an X-ray detector 12, an X-ray high voltage device 14, DAS18, a wedge 16 and a collimator depending on the scan plan in scanning the subject P. Power is supplied to various devices (hereinafter referred to as rotating frame-mounted devices) such as an insertion / removal mechanism for inserting / removing 17 into the X-ray exposure range. The scan plan has, for example, the number of scans, the range of scans, the timing of exposure, the conditions of exposure, and the conditions of image processing. The scan plan is set by the user in the terminal device 40, for example, based on the inspection order output from the HIS or RIS to the terminal device 40. The scan plan may be set by the user in RIS based on the inspection order output from HIS to RIS. The first battery 20 may be transferred to, for example, the second battery 23 mounted on the fixed frame 22 of the gantry device 10 or various devices mounted on the fixed frame 22 during transportation of the gantry device 10. Power may be supplied as needed.

The mounting position of the first battery 20 on the rotating frame 13 is not limited to FIG. For example, a plurality of first batteries 20 may be provided at positions line-symmetrical with respect to the rotation axis in consideration of the weight balance in the rotation frame 13. Further, the first battery 20 is not limited to the shape of a rectangular parallelepiped, and may be realized by a sheet-like shape. At this time, the sheet-shaped first battery 20 may be arranged, for example, along the circumferential direction of the rotating frame 13, for example, over the entire circumference. Further, the first battery 20 can also be used as a weight for adjusting the weight balance in the rotating frame 13. Further, the first battery 20 can be arranged in the vicinity of the power supply destination. At this time, the wiring related to the power supply can be simplified, and the noise due to the wiring can be reduced.

The first power detector 21 detects the remaining amount of electric power (hereinafter referred to as the first remaining amount) in the first battery 20. The first power detector 21 is realized by, for example, a voltmeter. At this time, the first remaining amount corresponds to the voltage value in the first battery 20. The first power detector 21 outputs the detected first remaining amount to the first processing circuit 36 via a transmission system such as wireless. That is, the first power detector 21 monitors the first remaining amount of the first battery 20, and sequentially outputs the first remaining amount, which is the monitoring result, to the first processing circuit 36. The method of transmitting the first remaining amount from the first power detector 21 to the first processing circuit 36 is not limited to wireless communication, and can be appropriately realized by other transmission means such as optical communication.

The wedge 16 is a filter for adjusting the X-ray dose of X-rays emitted from the X-ray tube 11. Specifically, the wedge 16 transmits and attenuates the X-rays emitted from the X-ray tube 11 so that the X-rays emitted from the X-ray tube 11 to the subject P have a predetermined distribution. It is a filter to do. The wedge 16 is, for example, a wedge filter or a bow-tie filter, and is a filter obtained by processing aluminum so as to have a predetermined target angle and a predetermined thickness.

The collimator 17 is a lead plate or the like for narrowing the X-rays transmitted through the wedge 16 to the X-ray irradiation range, and a slit is formed by a combination of a plurality of lead plates or the like. The wedge 16 and the collimator 17 may be inserted and removed from the front surface of the X-ray emission window in the X-ray tube 11 with respect to the X-ray exposure range depending on the X-ray conditions and the like by an insertion / removal mechanism (not shown).

The DAS 18 has an amplifier that amplifies the electric signal output from each X-ray detection element of the X-ray detector 12, and an A / D converter that converts the electric signal into a digital signal, and has detection data. To generate. The detection data generated by the DAS 18 is transferred to the first processing circuit 36. Further, DAS18 is an example of a data collection unit.

The fixed frame 22 rotatably supports the rotating frame 13. The fixed frame 22 includes a control device 15, a first memory 27, a first display 28, a first input interface 29, a first processing circuit 36, a first communication interface 35, a mobile fixing mechanism 26, a second battery 23, and an external power supply. A second contact 242 that can be electrically connected to the device, a contact drive mechanism 24 that drives the second contact 242, a connector (also referred to as an outlet tap) 243 that can be electrically connected to an external power source, and a second power detector 25. , A camera that photographs the surroundings of the gantry device 10 (hereinafter referred to as a peripheral photographing camera) and the like are mounted. Data communication between the first memory 27, the first display 28, the first input interface 29, and the first processing circuit 36 is performed, for example, via a bus (BUS). A second contact 242 electrically connected to the second battery 23 is provided at a position of the fixed frame 22 facing the rotating frame 13. The second contact 242 may be electrically connected to the connector 243. The second contact 242 is movably supported by the contact drive mechanism 24 between the contact position in contact with the first contact 241 and the separated position away from the first contact 241.

The control device 15 has a processing circuit having a CPU (Central Processing Unit) and the like, and a drive mechanism such as a motor and an actuator. The processing circuit has a processor such as a CPU and an MPU (Micro Processing Unit) and a memory such as a ROM (Read Only Memory) and a RAM (Random Access Memory) as hardware resources. Further, the control device 15 includes an integrated circuit for a specific application (Application Specific Integrated Circuit: ASIC), a field programmable gate array (Field Programmable Gate Array: FPGA), and another composite programmable logic device (Complex Programmable). ), It may be realized by a simple programmable logic device (SPLD). The control device 15 controls the X-ray high voltage device 14, the DAS 18, and the like in accordance with a command from the terminal device 40. The processor realizes the above control by reading and realizing a program stored in the memory.

Further, the control device 15 receives an input signal from the first input interface 29 attached to the terminal device 40 or the gantry device 10, and is controlled by the system control function 361 in the first processing circuit 36. It has a function of controlling the operation of the sleeper device 30 and the sleeper device 30. For example, the control device 15 controls to rotate the rotation frame 13 by the rotation drive device, controls to tilt the gantry device 10, controls to operate the sleeper device 30 and the top plate 33, controls to operate the contact drive mechanism 24, and moves. Control to operate the fixing mechanism 26 and the like. The control for tilting the gantry device 10 is based on the tilt angle (tilt angle) information input by the first input interface 29 attached to the gantry device 10, and the control device 15 is centered on an axis parallel to the X-axis direction. It may be realized by rotating the rotating frame 13. Further, the control device 15 may be configured to directly incorporate the program into the circuit of the processor instead of storing the program in the memory. In this case, the processor realizes the above control by reading and executing the program incorporated in the circuit.

The second battery 23 is mounted on the fixed portion. In scanning the subject P, the second battery 23 includes a control device 15, a mobile fixing mechanism 26, a first memory 27, a first display 28, a first input interface 29, and a first communication interface mounted on the fixed frame 22. Power is supplied to various devices (hereinafter referred to as fixed frame mounted devices) such as the ambient photographing camera provided on the exterior of the 35, the first processing circuit 36, and the gantry device 10. The second battery 23 may supply electric power to the first battery 20 or the rotating frame-mounted device, for example, when the gantry device 10 is being conveyed. The power supply destination according to the state of the gantry device 10 on which the rotating frame 13 and the fixed frame 22 are mounted will be described later.

When charging the battery, the contact drive mechanism 24 brings the first contact 241 into contact with the second contact 242. Specifically, the contact drive mechanism 24 moves the second contact 242 from the separated position to the contact position or from the contact position to the separated position under the control of the control device 15. The contact drive mechanism 24 is realized by, for example, a linear motion mechanism using a ball screw or the like and a motor. At this time, the contact drive mechanism 24 moves the second contact 242 mounted on the linear motion mechanism by transmitting the rotation of the motor by the control device 15 to the ball screw. The moving direction of the second contact 242 is, for example, a direction approaching the rotation axis related to the rotation of the rotation frame 13 or a direction away from the rotation axis.

FIG. 2 is a diagram showing an example of a charge point CP in which the first contact 241 and the second contact 242 can come into contact with each other. FIG. 2 shows a state in which the rotating frame 13 is rotated by the control device 15 so that the first contact 241 is located at a position facing the second contact 242 as the charge point CP. At this time, the contact drive mechanism 24 moves the second contact 242 toward the rotation axis so that the second contact 242 comes into close contact with the first contact 241 under the control of the control device 15, that is, the contact drive mechanism 24. Moves the second contact 242 from the separated position to the contact position. The double-headed arrow DA in FIG. 2 indicates the moving direction of the second contact 242 by the contact drive mechanism 24.

The second power detector 25 detects the remaining amount of power in the second battery 23 (hereinafter referred to as the second remaining amount). The second power detector 25 is realized by, for example, a voltmeter. At this time, the second remaining amount corresponds to the voltage value in the second battery 23. The second power detector 25 outputs the detected second remaining amount to the first processing circuit 36 via a transmission system such as wireless or wired. That is, the second power detector 25 monitors the second remaining amount of the second battery 23, and sequentially outputs the second remaining amount, which is the monitoring result, to the first processing circuit 36.

The moving and fixing mechanism 26 is provided on the gantry device 10 and is a mechanism that makes the gantry device 10 movable and fixed. The moving fixing mechanism 26 is provided, for example, on the bottom surface of the gantry device 10. The moving fixing mechanism 26 operates by the electric power supplied from the second battery 23. The moving fixing mechanism 26 has a moving mechanism for moving the gantry device 10 and a fixing mechanism for fixing the gantry device 10 to the floor surface.

The moving mechanism includes, for example, a caster provided on the bottom surface of the gantry device 10, a motor for driving the caster, and a transmission device (sprocket and chain, pulley and belt, bevel gear and drive) for transmitting the drive generated by the motor to the caster. It is realized by (shaft etc.). In addition, instead of the casters, it may be realized by another moving device such as an endless track. The moving mechanism moves the gantry device 10 under the control of the control device 15. The direction in which the gantry device 10 is moved is, for example, a direction orthogonal to the rotation axis of the rotation frame 13 and the vertical direction (X-axis direction). As for the configuration of the moving mechanism, since the existing technology can be used, detailed description thereof will be omitted.

The fixing mechanism has, for example, a function of fixing the gantry device 10 to the floor surface facing the bottom surface of the gantry device 10. The fixing mechanism locks the moving mechanism. The locking of the moving mechanism is, for example, fixing the wheels on the casters, blocking the transmission of power in the transmission device, and the like. In addition, the fixing mechanism has a fall prevention member that prevents the gantry device 10 from tipping over. The fall prevention member is realized as, for example, an outrigger. The fall prevention member may be realized by an anchor, a bolt, a nut, or the like for fixing the floor surface and the gantry device 10 instead of the outrigger. Since existing techniques can be used for the locking and fall prevention members of the moving mechanism, detailed description thereof will be omitted.

The above-mentioned moving mechanism and fixing mechanism may have a so-called power assist mechanism and may function according to a user's operation. That is, according to one of the embodiments, the moving fixing mechanism 26 is provided on a user-operable handle provided on the front surface, side surface, rear surface, etc. of the gantry device 10, for example, a switch provided on the handle, and the handle. It is provided with a force sensor that detects the operating force of the user. The switch and the force sensor are electrically connected to the control device 15. When the user applies a force in the X direction to the steering wheel while the switch is pressed, the force sensor outputs a signal corresponding to the magnitude of the force to the control device 15. When the magnitude of the applied force is larger than a predetermined threshold value, the control device 15 controls the moving mechanism to generate power according to the magnitude of the force in the direction of the force, which is used as a gantry device. Move 10.

The first memory 27 is a storage device such as an HDD (Hard disk Drive), an SSD (Solid State Drive), or an integrated circuit storage device that stores various information. The first memory 27 stores, for example, the detection data output from the DAS 18 and the projection data generated by the preprocessing function 362. In addition to the HDD and SSD, the first memory 27 includes a portable storage medium such as a CD (Compact Disc), a DVD (Digital Versaille Disc), and a flash memory, and a semiconductor memory element such as a RAM (Random Access Memory). It may be a drive device that reads and writes various information between the devices.

The first display 28 is provided, for example, on the exterior of the gantry device 10. The first display 28 displays various information. For example, the first display 28 outputs various information generated by the power supply control function 363 in the first processing circuit 36, a GUI (Graphical User Interface) for receiving various operations from the user, and the like. For example, the first display 28 may include, for example, a liquid crystal display (LCD: Liquid Crystal Display), a CRT (Casode Ray Tube) display, an organic EL display (OELD: Organic Electro Luminescence Display), a plasma display, or any other display. , Can be used as appropriate. The first display 28 corresponds to a display unit. In addition, the first display 28 displays an image taken by a peripheral camera while the gantry device 10 is being conveyed. The display of the image taken by the ambient camera may be displayed by a dedicated confirmation monitor (front confirmation monitor, etc.).

The first input interface 29 is provided, for example, on the exterior of the gantry device 10. The first input interface 29 receives various input operations from the user, converts the received input operations into electric signals, and outputs the received input operations to the first processing circuit 36. For example, the first input interface 29 receives from the user input of whether or not the gantry device 10 has a transport mode, collection conditions for collecting projection data, selection of a scan plan, setting of a scan plan, and the like. As the first input interface 29, for example, a keyboard, a switch, a button, a touch pad, a touch panel display, and the like can be appropriately used. In the present embodiment, the first input interface 29 is not limited to the one provided with physical operation parts such as a keyboard, a switch, a button, a touch pad, and a touch panel display. Further, the first input interface 29 is an example of an input unit.

The first communication interface 35 performs data communication with the terminal device 40, the image generation device 5, PACS, HIS, and RIS. The standard for communication by the first communication interface 35 may be any standard, and examples thereof include HL7 (Health Level 7), DICOM, or both. For example, the first communication interface 35 transmits the projection data preprocessed by the preprocessing function 362 to the image generation device 5. Further, the first communication interface 35 receives the signal transmitted from the terminal device 40 via the second communication interface 41. The signal transmitted from the terminal device 40 is, for example, a scan plan selected via the second input interface 45, a scan execution instruction, various instructions regarding the operation of the X-ray CT device 3, and whether or not the gantry device 10 has a transport mode. Input etc.

The first processing circuit 36 responds to the electric signal of the input operation output from the first input interface 29 and the electric signal of the input operation output from the second input interface 45 in the terminal device 40, and the entire X-ray CT device 3 Controls the operation of. For example, the first processing circuit 36 has a processor such as a CPU, an MPU, and a GPU (Graphics Processing Unit) and a memory such as a ROM or RAM as hardware resources. The first processing circuit 36 executes a system control function 361, a preprocessing function 362, a power supply control function 363, and the like by a processor that executes a program expanded in a memory. The first processing circuit 36 that executes the system control function 361, the preprocessing function 362, and the power supply control function 363 respectively corresponds to the system control unit, the preprocessing unit, and the power supply control unit.

The system control function 361, the preprocessing function 362, and the power supply function 363 are not limited to the case where they are realized by a single processing circuit. A processing circuit may be configured by combining a plurality of independent processors, and the system control function 361, the preprocessing function 362, and the power supply function 363 may be realized by each processor executing a program.

The first processing circuit 36 controls each function of the first processing circuit 36 based on the input operation received from the user via the first input interface 29 and the second input interface 45 by the system control function 361. Specifically, the system control function 361 reads out the control program stored in the first memory 27, expands it on the memory in the first processing circuit 36, and follows the expanded control program of the X-ray CT device 3. Control each part.

The first processing circuit 36 performs preprocessing such as logarithmic conversion processing, offset correction processing, sensitivity correction processing between channels, and beam hardening correction on the detection data output from the DAS 18 by the preprocessing function 362. To generate. The data before preprocessing is referred to as raw data, and the data after preprocessing is referred to as projection data. The generated projection data is transmitted to the image generation device 5 via the first communication interface 35 and the network 4.

The first processing circuit 36 uses the power supply control function 363 to transfer the device mounted on the rotating frame 13 to the device mounted on the fixed frame 22 based on the state of the gantry device 10 including the rotating portion and the fixed portion. Controls the power supply from the battery. For example, the power supply control function 363 controls the power supply from the external power supply ES to the first battery 20 in the standby state (hereinafter referred to as standby state) for scanning the subject P by X-rays, and X-rays in the scan. The power supply from the first battery 20 and the second battery 23 is controlled in the exposed state of. The standby state corresponds to, for example, a state in which the gantry device 10 is fixed to the floor surface by the moving fixing mechanism 26, and in the standby state, the rotating frame 13 is in a non-rotating state.

The gantry device 10 takes, for example, a transport state, a standby state, and an exposure state as its state. The transport state is a state of the portable X-ray CT device 3, and refers to a state in which the gantry device 10 is being transported. In such a state, the gantry device 10 is not connected to an external power source by wire. Further, the rotation frame 13 of the gantry device 10 is restricted in rotation, and typically cannot be rotated by the lock mechanism. The transport state is not limited to the state of being actually moved, but also includes the state of being temporarily stopped during the movement. Next, the standby state refers to a state in which the gantry device 10 arrives at a place where shooting is performed and the gantry device 10 is wiredly connected to an external power source. X-ray irradiation has not been performed yet. For example, in such a standby state, the gantry device 10 may be fixed to the floor surface or the wall by an anchoring mechanism (for example, a fixing mechanism). The exposure state is a state in which the gantry device 10 is wiredly connected to an external power source, fixed, and a sequence of imaging is executed, and X-rays are irradiated for imaging for positioning and X-ray CT scanning. Can be done. The method of separating the states is not limited to this. Whether or not the gantry device 10 can be moved, whether or not it is connected to an external power source and can receive power supply, whether or not shooting is being performed, and whether or not the first gantry device 10 is mounted on the gantry device 10. Based on the state of the gantry device 10, such as the state of charge of the battery 20 or the second battery 23, various methods of separating the states can be adopted for power control.

Further, the power supply control function 363 calculates the power consumption consumed by the scan based on the scan conditions relating to the scan using X-rays. The power consumption includes, for example, the power consumption consumed by the rotating frame-mounted device (hereinafter referred to as the first power consumption), the power consumption consumed by the fixed frame-mounted device (hereinafter referred to as the second power consumption), and the like. Has. For example, when the scan plan selected by the terminal device 40 is received via the first communication interface 35, the power supply control function 363 determines the first power consumption and the second power consumption based on the selected scan plan. To calculate.

Specifically, the power supply control function 363 uses scan parameters such as the number of scans in the scan plan, scan range, exposure timing, and exposure conditions (tube current, tube voltage, shooting time, etc.). Calculate 1 power consumption and 2nd power consumption. The power supply control function 363 may determine the first power consumption and the second power consumption by using the power consumption correspondence table corresponding to a plurality of scan parameters in the scan plan. Further, the power supply control function 363 determines the scan parameters based on the inspection order received from HIS or RIS, and estimates the electric energy related to the first power consumption and the second power consumption based on the scan parameters. May be good.

Next, the power supply control function 363 determines that the scan is feasible when the remaining amount of power in the battery is equal to or greater than the power consumption. Specifically, when the first remaining amount is the first power consumption or more and the second remaining amount is the second power consumption or more, it is determined that the scan can be executed. Further, the power supply control function 363 may calculate the number of possible shootings based on the calculated power consumption (electric energy). At this time, the power supply control function 363 displays the calculated number of possible shootings on the first display 28, transmits it to the terminal device 40 via the first communication interface 35, and displays it on the second display 44.

Further, in the power supply control function 363, when the remaining power of the battery is less than the power consumption and the gantry device 10 on which the rotating frame 13 and the fixed frame 22 are mounted is electrically connected to the external power supply ES. , Start charging the battery in the scan standby state. Specifically, in the power supply control function 363, the first remaining amount is less than the first power consumption, the second remaining amount is less than the second power consumption, and the gantry device 10 is external via the connector 243. When connected to the power supply ES, in the standby state, the rotating frame 13 is rotated to the charge point CP at the opposite position where the first contact 241 and the second contact 242 face each other, and the rotating frame 13 is stopped in that state. As a result, the first contact 241 faces the second contact 242 as shown in FIG. The power supply control function 363 controls the contact drive mechanism 24 so as to bring the first contact 241 and the second contact 242 into contact with each other when the rotating frame 13 reaches the opposite position.

According to one of the embodiments, when the rotation of the rotating frame 13 is stopped, the rotating frame 13 is stopped so as to always be in the same state (rotational state) (hereinafter referred to as a stopped state). In this embodiment, when the rotating frame 13 is in the stopped state, the first contact 241 on the rotating frame 13 side and the second contact 242 on the fixed frame 22 side face each other (that is, the center positions of both contacts). The second contact 242 is arranged so that the distance between them is substantially minimized). As a result, by putting the rotating frame 13 in the stopped state, it is possible to make it possible to exchange electric power.

According to another embodiment, the second contact 242 has a predetermined length in the circumferential direction of rotation so that power can be supplied when the rotation frame 13 is not fixed but within a predetermined rotation state range. It may be extended with.

That is, the power supply control function 363 controls the contact drive mechanism 24 to move the second contact 242 from the separated position to the contact position. As a result, the first contact 241 and the second contact 242 come into contact with each other, and charging of the first battery 20 from the external power supply ES is started. In addition, the power supply control function 363 starts charging the second battery 23 by supplying power from the external power supply ES via the connector 243.

With the start of charging the battery, the power supply control function 363 will use the time when the scan can be started (hereinafter referred to as the scan start time) based on the remaining power of the battery, the power consumption, and the charging speed. (Call) is calculated and the scan start time is displayed on the display. Specifically, the power supply control function 363 divides the difference between the first power consumption and the first remaining amount by the amount of charge per unit time (hereinafter referred to as the charge speed) to obtain the first battery. The scan start possible time (hereinafter referred to as the first start time) with respect to 20 is calculated. Further, the power supply control function 363 divides the difference between the second power consumption and the second remaining amount by the charging speed, so that the scan start possible time for the second battery 23 (hereinafter referred to as the second start time). ) Is calculated. The power supply control function 363 determines the later of the first start time and the second start time as the scan start possible time. The power supply control function 363 displays the scan startable time on the first display 28, and transmits the scan startable time to the terminal device 40 via the first communication interface 35.

The power supply control function 363 is a message prompting the battery to be charged when the remaining power of the battery is less than the power consumption and the gantry device 10 is not electrically connected to the external power supply ES (hereinafter, charging prompting). A message) is displayed on the first display 28 as a warning, for example. Specifically, in the power supply control function 363, the first remaining amount is less than the first power consumption and the second remaining amount is less than the second power consumption, and the gantry device 10 uses the external power supply ES via the connector 243. When not connected to, a charging reminder message prompting the user to charge the first battery 20 and the second battery 23 is displayed on the first display 28. At this time, the power supply control function 363 transmits a charge reminder message to the terminal device 40 via the first communication interface 35.

The power supply control function 363 supplies electric power from the battery to the moving fixing mechanism 26 when the gantry device 10 is moved and when the gantry device 10 is fixed to the floor surface. For example, when the user inputs an instruction (such as pressing a button) for transporting the gantry device 10 via the first input interface 29 or the terminal device 40, the power supply control function 363 supplies power to the mobile fixing mechanism 26. do. At this time, the gantry device 10 is in the transport state. The discrimination between the standby state and the transport state may be determined by the presence or absence of an electrical connection between the external power supply ES and the connector 243.

The sleeper device 30 is a device for placing and moving the subject P to be scanned, and includes a base 31, a sleeper drive device 32, a top plate 33, and a top plate support frame 34. The sleeper device 30 may further have a third battery and a moving fixing mechanism. At this time, the sleeper device 30 becomes a portable type. Since the third battery and the moving fixing mechanism are the same as the second battery 23 and the moving fixing mechanism 26 mounted on the fixed frame 22, the description thereof will be omitted.

The base 31 is a housing that supports the top plate support frame 34 so as to be movable in the vertical direction. The sleeper drive device 32 is a motor or an actuator that moves the top plate 33 on which the subject P is placed in the long axis direction of the top plate 33. The sleeper drive device 32 moves the top plate 33 under the control of the terminal device 40 or the control device 15. The top plate 33 provided on the upper surface of the top plate support frame 34 is a plate on which the subject P is placed. In addition to the top plate 33, the sleeper drive device 32 may move the top plate support frame 34 in the long axis direction of the top plate 33.

The terminal device 40 has a second communication interface 41, a second memory 42, a second processing circuit 43, a second display 44, and a second input interface 45. The terminal device 40 is used to input instructions regarding the operation of the gantry device 10 and the sleeper device 30, and is realized by, for example, a tablet PC.

The second communication interface 41 performs data communication between the gantry device 10 and the image generation device 5, PACS, HIS, and RIS. The standard for communication by the second communication interface 41 may be any standard, and examples thereof include HL7, DICOM, or both. The second communication interface 41 outputs the data acquired by the data communication with various devices to the second memory 42. The second communication interface 41 transmits the electric signal of the input operation input to the second input interface 45 to the first communication interface 35. Further, the second communication interface 41 outputs various medical images, inspection orders, scan plans, etc. received from the image generation device 5 to the second memory 42. The second communication interface 41 outputs the charging reminder message and the scan start possible time transmitted from the first communication interface 35 to the second processing circuit 43.

The second memory 42 is a storage device such as an HDD, an SSD, or an integrated circuit storage device that stores various information. The second memory 42 is a drive device for reading and writing various information between a portable storage medium such as a CD, DVD, or a flash memory, a semiconductor memory element such as a RAM, or the like, in addition to the HDD or SSD. May be good. The second memory 42 stores data collected from various devices via the second communication interface 41. For example, the second memory 42 stores a plurality of scan plans acquired by the second processing circuit 43 via the second communication interface 41, and medical images generated by the image generator 5 by executing the scan plans. do. The second memory 42 may store the inspection order corresponding to the scan plan. The second memory 42 stores programs related to the terminal control function 431 and the display function 432. Since the means for realizing the second memory 42 is the same as that of the first memory 27, the description thereof will be omitted.

The second processing circuit 43 has, for example, a processor such as a CPU, an MPU, or a GPU and a memory such as a ROM or RAM as hardware resources. Further, the second processing circuit 43 may be realized by an ASIC, FPGA, CPLD, SPLD or the like. The second processing circuit 43 has a terminal control function 431, a display function 432, and the like. The terminal control function 431 and the display function 432 are stored in the second memory 42 in the form of a program that can be executed by a computer. The second processing circuit 43 executes the terminal control function 431 and the display function 432 by the processor that executes the program expanded in the memory. That is, the second processing circuit 43 corresponds to a processor that realizes a function corresponding to the program by reading the program from the second memory 42 and executing the program.

In other words, the second processing circuit 43 in the state where the program is read has a function corresponding to the read program. The terminal control function 431 and the display function 432 are not limited to the case where they are realized by a single processing circuit. A processing circuit may be configured by combining a plurality of independent processors, and the terminal control function 431 and the display function 432 may be realized by each processor executing a program. The second processing circuit 43 that realizes the terminal control function 431 and the display function 432 is an example of the display control unit and the terminal control unit. The second processing circuit 43 controls each function of the second processing circuit 43 based on the input operation received from the user via the second input interface 45 by the terminal control function 431. Specifically, the terminal control function 431 reads the terminal control program stored in the second memory 42 and expands it on the memory in the second processing circuit 43, and each part of the terminal device 40 according to the expanded control program. To control.

The second processing circuit 43 controls the second display 44 for various displays on the second display 44 by the display function 432. For example, the display function 432 displays a plurality of scan plans in a list on the second display 44. The display function 432 causes the second display 44 to display the charging reminder message and the scannable start time output from the first communication interface 35. The display function 432 causes the second display 44 to display the medical image transmitted from the image generation device 5. When an instruction for image processing such as rotation, enlargement, and addition of an annotation is input to the medical image displayed on the second display 44 via the second input interface 45, the display function 432 performs the image processing. This is executed, and the result of the image processing is displayed on the second display 44.

The second display 44 displays various information. For example, the second display 44 displays a GUI (Graphical User Interface) or the like for receiving various operations from the operator. The second display 44 may be, for example, a liquid crystal display (LCD: Liquid Crystal Display), a CRT (Casode Ray Tube) display, an organic EL display (OELD: Organic Electro Luminescence Display), a plasma display or any other display as appropriate. , Can be used.

The second display 44 displays the medical image transmitted from the image generation device 5 and the result of executing the above image processing by the display function 432. The second display 44 displays a plurality of scan plans in a list by the display function 432. The second display 44 displays a charging reminder message output from the first communication interface 35 by the display function 432. The charge reminder message has a character string for urging the user to connect the connector 243 to the external power supply ES. The content of the charging reminder message is, for example, "Please connect the connector to an external power supply". Further, the second display 44 displays the scannable start time. Since the means for realizing the second display 44 is the same as that of the first display 28, the description thereof will be omitted.

The second input interface 45 receives various input operations from the operator, converts the received input operations into electric signals, and outputs the received input operations to the second processing circuit 43. Further, the converted electric signal is output to the first processing circuit 36 via the second communication interface 41 and the first communication interface 35. For example, the second input interface 45 receives selection instructions, various conditions, and the like from the operator. As the second input interface 45, for example, a mouse, a keyboard, a switch, a button, a touch pad, a touch panel display, and the like can be appropriately used.

In the present embodiment, the second input interface 45 is not limited to the one provided with physical operation parts such as a mouse, a keyboard, a switch, a button, a touch pad, and a touch panel display. For example, a processing circuit for an electric signal that receives an electric signal corresponding to an input operation from an external input device provided separately from the device and outputs the electric signal to the first processing circuit 36 and the second processing circuit 43. It is included in the example of the second input interface 45.

The image generation device 5 has a third communication interface 51, a third memory 52, and a third processing circuit 53. The image generation device 5 may be incorporated in another server device such as a server in PACS.

The third communication interface 51, for example, performs data communication between the first communication interface 35 and the second communication interface 41. The third communication interface 51 can also communicate with various server devices such as a PACS server via the network 4. The standard for communication by the third communication interface 51 may be any standard, and examples thereof include HL7, DICOM, or both. The third communication interface 51 outputs data acquired by data communication with the gantry device 10 and various server devices to the third memory 52.

For example, the third communication interface 51 receives an electric signal of an input operation input to the second input interface 45 in the terminal device 40. The third communication interface 51 outputs the received electric signal to the third processing circuit 53. Further, the third communication interface 51 receives the projection data transmitted from the gantry device 10, and outputs the received projection data to the third processing circuit 53. The third communication interface 51 transmits the medical image generated by the image generation function 532 to the terminal device 40.

The third memory 52 is a storage device such as an HDD (Hard disk Drive), an SSD (Solid State Drive), or an integrated circuit storage device that stores various information. In addition to the HDD and SSD, the third memory 52 includes a portable storage medium such as a CD (Compact Disc), a DVD (Digital Versaille Disc), and a flash memory, and a semiconductor memory element such as a RAM (Random Access Memory). It may be a drive device that reads and writes various information between the devices.

The third memory 52 stores data generated by executing the reconstruction function 531 and the image generation function 532. The third memory 52 stores the projection data transmitted from the gantry device 10 via the third communication interface 51. The third memory 52 may store the detection data before preprocessing output from the gantry device 10. Further, the third memory 52 stores the reconstruction data generated by the reconstruction function 531 and the medical image generated by the image generation function 532.

The third memory 52 stores a program related to the reconstruction process executed by the reconstruction function 531. The reconstruction process is, for example, a filter correction back projection method (FBP method: Filtered Back Projection), a successive approximation reconstruction method, or the like. The third memory 52 stores a program related to the image generation process executed by the image generation function 532. The image generation processing includes, for example, volume rendering, surface volume rendering, image value projection processing, MPR (Multi-Planer Reaction) processing, CPR (Curved MPR) processing, and the like.

The third processing circuit 53 has, for example, as hardware resources, a processor such as a CPU, MPU, and GPU, and a memory such as a ROM (Read Only Memory) and a RAM. In addition, the first processing circuit 36 includes an integrated circuit (Application Specific Integrated Circuit: ASIC) for a specific application, a field programmable gate array (Field Programmable Gate Array: FPGA), and another complex programmable logic device (Complex Programmable). : CPLD), a simple programmable logic device (SPLD), or the like.

The third processing circuit 53 has a reconstruction function 531 and an image generation function 532. The third processing circuit 53 may have a preprocessing function 362. At this time, the detection data output from the DAS 18 is transmitted to the image generation device 5. In the reconstruction function 531 and the image generation function 532, each function is stored in the third memory 52 in the form of a program that can be executed by a computer. The third processing circuit 53 executes the reconstruction function 531 and the image generation function 532 by the processor that executes the program expanded in the memory.

That is, it corresponds to a processor that realizes a function corresponding to each program by reading a program from the third processing circuit 53 and the third memory 52 and executing the program. In other words, the third processing circuit 53 in the state where each program is read has a function corresponding to the read program. The reconstruction function 531 and the image generation function 532 are not limited to the case where they are realized by a single processing circuit. A processing circuit may be configured by combining a plurality of independent processors, and the reconstruction function 531 and the image generation function 532 may be realized by each processor executing a program.

The third processing circuit 53 performs reconstruction processing on the projection data transmitted from the gantry device 10 by the reconstruction function 531 to generate volume data. The reconstruction function 531 stores the reconstructed volume data in the third memory 52. The image generation function 532 generates a medical image by performing various image processing on the reconstructed volume data.

In the portable X-ray CT device 3 according to the present embodiment configured as described above, the process of controlling the power supply by the power supply control function 363 (hereinafter referred to as the power supply control process) is described in FIGS. This will be described with reference to FIG.

FIG. 3 is a diagram showing an example of power transmission in a charged state of the first battery 20 and the second battery 23. As shown in FIG. 3, in the charged state, the power supply control function 363 controls the rotating frame 13 and the contact drive mechanism 24 so that the first contact 241 and the second contact 242 are brought into contact with each other at the charge point CP. .. The electric power input from the external power supply ES to the gantry device 10 via the connector 243 reaches the second battery 23 and the first battery 20 via the charge point CP.

As a result, the first battery 20 and the second battery 23 are charged. Further, as shown by the dotted line arrow in FIG. 3, the rotating frame-mounted device 131 may be supplied with power from the first battery 20 as needed, for example, cooling the X-ray tube 11 and the DAS 18. Further, as shown by the dotted line arrow in FIG. 3, the fixed frame-mounted device 221 has, for example, the execution of various functions in the first processing circuit 36, the display of various information in the first display 28, and the like, if necessary. It may be powered from the battery 23 of 2.

FIG. 4 is a diagram showing an example of electric power transmission in a transport state of the gantry device 10. As shown in FIG. 4, the external power supply ES is disconnected from the connector 243. As shown by the solid arrow in FIG. 4, in the transport state, the power supply control function 363 supplies power from the second battery 23 to the transport support unit. The transport support unit is various devices that support the user regarding the transport of the gantry device 10, such as the moving fixing mechanism 26, the first display 28, the ambient photographing camera, and the front confirmation monitor. As shown by the dotted arrow in FIG. 4, the rotating frame-mounted device 131 may be powered by the first battery 20 as needed, for example, cooling the X-ray tube 11 or the DAS 18.

FIG. 5 is a diagram showing an example of power transmission in the standby state of the gantry device 10. As shown by the solid arrow in FIG. 5, in the standby state, the power supply control function 363 energizes the rotating frame-mounted device 131 from the first battery 20. In addition, the power supply control function 363 energizes the fixed frame mounted device 221 from the second battery 23. As a result, the power supply control function 363 prepares for scanning, that is, exposure to X-rays. As shown by the dotted line in FIG. 5, the external power supply ES may be connected to the gantry device 10 via the connector 243. At this time, the power supply control function 363 is used in combination with the first battery 20 and the second battery 23 to supply power to the fixed frame mounting device 221 and the rotating frame mounting device 131 from the external power supply ES.

FIG. 6 is a diagram showing an example of power transmission in an X-ray exposure state in the gantry device 10. As shown by the solid arrow in FIG. 6, when exposed to X-rays, the first battery 20 supplies power to the rotating frame-mounted device 131, and the second battery 23 powers the fixed frame-mounted device 221. Supply. The second battery 23 may be supplied with electric power from the external power supply ES via the connector 243 as shown by the dotted line arrow in FIG. In the X-ray exposure state, the rotating frame-mounted device 131 becomes electrically independent from the fixed frame 22, and the X-ray CT device 3 can operate without a slip ring.

As an application example of this embodiment, a slip ring may be provided between the rotating frame 13 and the fixed frame 22 instead of the charge point CP. At this time, the first contact 241, the second contact 242, and the contact drive mechanism 24 are unnecessary. In this application example, even when the rotating frame 13 is rotating, such as during exposure, electric power can be supplied to the rotating frame-mounted device 131 by using the first battery 20 and the external power supply ES in combination. Therefore, it is possible to reduce the electric power supplied to the rotating frame 13 when the rotating frame 13 is rotating. As a result, the slip ring in this application example can reduce the number of power supply channels as compared with the conventional slip ring, and the slip ring can be miniaturized.

FIG. 7 is a table showing a list of power supply destinations and power supply sources according to the state of the gantry device 10 with respect to FIGS. 3 to 6. The arrow shown in FIG. 7 indicates that electric power is supplied toward the arrowhead of the arrow. The x mark shown in FIG. 7 indicates that power is not supplied. The parenthesized arrows in the columns at the charge points in FIG. 7 indicate the power supply when a slip ring is used instead of the charge point CP. Further, "as needed" in the row at the charge point in FIG. 7 means that when the gantry device 10 is in the transport state, the rotating frame side and the fixed frame side are used according to the first remaining amount and the second remaining amount. It shows that electric power is appropriately interchanged between the two. Further, the dotted line arrows in FIGS. 3 to 6 indicate that electric power is interchanged as needed.

For example, when it is necessary to continuously supply electric power to the X-ray tube 11 or when it is necessary to continuously cool the DAS 18, the electric power is supplied to the rotating frame-mounted device 131 even when the gantry device 10 is being conveyed. At this time, the power supply control function 363 supplies power to the rotating frame-mounted device 131 until the temperature of the X-ray tube 11 and the temperature of the DAS 18 reach constant temperatures. As a result, the X-ray tube 11 and the DAS 18 are cooled to a constant temperature. Next, the power supply control function 363 stops the supply of power to the rotating frame-mounted device 131 when the temperature of the X-ray tube 11 and the temperature of the DAS 18 reach a certain temperature.

Further, even when the data associated with the X-ray exposure remains in the rotating frame-mounted device 131, the power supply control function 363 uses the rotating frame-mounted device 131 until the transfer of the data to the fixed frame 22 is completed. Power to. At this time, when the transfer of the data to the fixed frame 22 is completed, the power supply to the rotating frame-mounted device 131 is stopped. Further, when the remaining battery level (first remaining amount and second remaining amount) is sufficient and the shooting order or emergency shooting order is transferred from the RIS to the X-ray CT device 3, the power supply control function 363. Maintains power supply to the rotating frame-mounted device 131 and the fixed-frame-mounted device 221. Further, in a transport state such as during transport of the gantry device 10, the power supply control function 363 may supply power to the rotating frame-mounted device 131 in the power saving mode. The power saving mode is, for example, a mode in which power is supplied only to a device that takes a long time to start up due to preparation for scanning in the device 131 equipped with a rotating frame, and power is not supplied to a device that does not take a long time to start up.

Hereinafter, the procedure of the power supply control process when the gantry device 10 is in the standby state will be described. FIG. 8 is a flowchart showing an example of the procedure of the power supply control process.

(Power supply control process)
(Step S801)
A list of scan plans is displayed on at least one of the first display 28 and the second display 44. The user selects a scan plan via the first input interface 29 or the second input interface 45. The selected scan plan is output to the first processing circuit 36. A list of inspection orders may be displayed on at least one of the first display 28 and the second display 44. At this time, the user selects the inspection order via the first input interface 29 or the second input interface 45. The selected inspection order is output to the first processing circuit 36.

(Step S802)
The first processing circuit 36 calculates the power consumption in the gantry device 10 based on the selected scan plan by the power supply control function 363. Specifically, the power supply control function 363 uses scan parameters such as the number of scans in the selected scan plan, scan range, exposure timing, and exposure conditions, and uses the first power consumption and the second power consumption. And calculate. When the inspection order is selected, the power supply control function 363 may calculate the first power consumption and the second power consumption by using the contents in the selected inspection order. Further, the power supply control function 363 determines the first power consumption and the second power consumption by collating the correspondence table of the first power consumption and the second power consumption with respect to the scan parameter with the selected scan plan. You may. At this time, the correspondence table is stored in the first memory 27.
That is,

(Step S803)
The power detector including the first power detector 21 and the second power detector 25 is a battery remaining amount (first remaining amount and second remaining amount) in each of the first battery 20 and the second battery 23. ) Is detected. That is, the first power detector 21 detects the first remaining amount and outputs the first remaining amount to the first processing circuit 36. In addition, the second power detector 25 detects the second remaining amount and outputs the second remaining amount to the first processing circuit 36. Regardless of whether or not the power supply control process is executed, the first remaining amount and the second remaining amount are always monitored by the first power detector 21 and the second power detector 25, respectively, and the first process is performed. It may be output to the circuit 36. At this time, this step becomes unnecessary.

(Step S804)
The first processing circuit 36 compares the remaining amount of power of the battery detected by the power supply control function 363 with the calculated power consumption. If the remaining amount of power is equal to or greater than the power consumption (Yes in step S804), the process of step S810 is executed. If the remaining amount of power is less than or equal to the power consumption (No in step S804), the process of step S805 is executed.

Specifically, the power supply control function 363 compares the first remaining amount and the first power consumption, and compares the second remaining amount and the second power consumption. When the first remaining amount is equal to or greater than the first power consumption and the second remaining amount is equal to or greater than the second power consumption, the processes of step S804 Yes) and step S810 are executed. When the first remaining amount is equal to or more than the first power consumption and the second remaining amount is less than the second power consumption, or when the first remaining amount is less than the first power consumption and the second remaining amount is the second remaining amount. When the power consumption is 2 or more, or when the first remaining amount is less than the first power consumption and the second remaining amount is less than the second power consumption, No is determined in step S804, and the process of step S805 is performed. Will be executed.

(Step S805)
The first processing circuit 36 determines whether or not the connector 243 is electrically connected to the external power supply ES by the power supply control function 363. When the connector 243 is electrically connected to the external power supply ES (Yes in step S805), the process of step S807 is executed. When the connector 243 is not electrically connected to the external power supply ES (No in step S805), the process of step S806 is executed.

(Step S806)
The first processing circuit 36 causes the display (first display 28 and second display 44) to display a charge reminder message prompting the battery to be charged by the power supply control function 363. At this time, the display may display an error message that the scan cannot be performed together with the charging reminder message.

Specifically, the power supply control function 363 causes a monitor or the like provided on the exterior of the first display 28 and the gantry device 10 to display a charge reminder message. In addition, the power supply control function 363 transmits a charge reminder message and an error message to the terminal device 40 via the first communication interface 35. When the terminal device 40 receives the charge reminder message and the error message via the second communication interface 41, the terminal device 40 displays the received charge reminder message and the error message on the second display 44. After this step, the process of step S805 is repeated. That is, the display of the charge reminder message and the error message in this step is executed until the connector 243 and the external power supply ES are electrically connected by the user.

(Step S807)
The first processing circuit 36 starts charging the battery by the power supply control function 363. Specifically, the power supply control function 363 rotates the rotating frame 13 so that the first contact 241 is located at the charge point CP under the control of the control device 15. Next, the power supply control function 363 controls the contact drive mechanism 24 to bring the second contact 242 into contact with the first contact 241. As a result, charging of the first battery 20 is started. The power supply control function 363 may determine whether or not the second remaining amount has reached the maximum charge capacity of the second battery 23. The power supply control function 363 starts charging the second battery 23 when the second remaining amount has not reached the maximum charge capacity of the second battery 23.

(Step S808)
The first processing circuit 36 calculates the scan start possible time based on the remaining battery level, the power consumption, and the charging speed by the power supply control function 363. Specifically, the power supply control function 363 calculates the first start time by dividing the difference between the first remaining amount and the first power consumption by the charging speed. In addition, the power supply control function 363 calculates the second start time by dividing the difference between the second remaining amount and the second power consumption by the charging speed. Subsequently, the power supply control function 363 determines the later of the first start time and the second start time as the scan start possible time.

(Step S809)
The first processing circuit 36 displays the scan start possible time on the display by the power supply control function 363. Specifically, the power supply control function 363 displays the scan startable time on the first display 28, and transmits the scan startable time to the terminal device 40 via the first communication interface 35. The second processing circuit 43 causes the display function 432 to display the scan start possible time received on the second communication interface 41 on the second display 44. After this step, the process of step S803 is repeated.

(Step S810)
The first processing circuit 36 determines whether or not the battery is being charged by the power supply control function 363. If the battery is being charged (Yes in step S810), the process of step S811 is executed. If the battery is not charging (No in step S810), the process of step S812 is executed. Specifically, the power supply control function 363 determines whether or not at least one of the first battery 20 and the second battery 23 is being charged. When at least one of the first battery 20 and the second battery 23 is being charged (Yes in step S810), the process of step S811 is executed. When both the first battery 20 and the second battery 23 are not being charged (No in step S810), the process of step S812 is executed.

(Step S811)
The first processing circuit 36 stops charging the battery by the power supply control function 363. Specifically, the power supply control function 363 moves the second contact 242 from the contact position to the remote position by controlling the contact drive mechanism 24. As a result, the first contact 241 and the second contact 242 are electrically cut off, and charging of the first battery 20 is stopped. At this time, the rotating frame-mounted device 131 is electrically independent of the fixed frame 22. Further, the power supply control function 363 stops charging the second battery 23.

(Step S812)
When the scan start instruction by the user is input via the terminal device 40, the scan corresponding to the selected scan plan is executed. Specifically, when a scan start instruction is input via the second input interface 45, the second communication interface 41 transmits the scan start instruction to the first communication interface 35. The first communication interface 35 outputs a scan start instruction to the first processing circuit 36. The first processing circuit 36 controls various devices in the X-ray CT device 3 so as to execute a scan corresponding to the selected scan plan by the system control function 361 triggered by the input of the scan start instruction. At this time, the first battery 20 supplies electric power to the rotating frame-mounted device 131. In addition, the second battery 23 powers the fixed frame mounted device 221. With the above, the power supply control process is completed.

According to the portable X-ray CT device 3 according to the first embodiment described above, the battery is mounted on each of the rotating portion and the fixed portion, and the state of the gantry device 10 including the rotating portion and the fixed portion. Based on the above, the power supply from the battery to the rotating frame-mounted device 131 and the fixed frame-mounted device 221 is controlled. As a result, according to the X-ray CT device 3, even in the event of a power failure, the battery powers the rotating frame-mounted device 131 and the fixed frame-mounted device 221 as needed even during a power failure, even though an uninterruptible power supply is not required. Can be supplied. Further, according to the X-ray CT apparatus 3, for example, as shown in FIGS. 5 and 7, the power supply control function 363 includes a first battery 20 in the rotating portion and a second battery 23 in the fixed portion. Power is supplied to each other depending on the situation. Therefore, the scan can be operated even during a power failure, and for example, the cost of the uninterruptible power supply and various costs related to the electrical connection between the uninterruptible power supply and the gantry device 10, that is, the uninterruptible power supply. Costs can be reduced.

Further, according to the X-ray CT apparatus 3, it is possible to realize the miniaturization and weight reduction of the slip ring by eliminating the need for the slip ring or reducing the number of channels. As a result, the weight and size of the gantry device 10 can be reduced, and the operability in transporting the gantry device 10 can be improved. In addition, according to the X-ray CT device 3, maintenance such as dealing with wear debris generated by the brush in the slip ring becomes unnecessary due to the need for the slip ring or the miniaturization of the slip ring by reducing the number of channels. Or, by reducing the maintenance, the maintainability of the X-ray CT device 3 can be improved and the maintenance cost can be reduced.

Further, according to the portable X-ray CT apparatus 3 according to the first embodiment, the power consumption consumed by the scan is calculated based on the scan conditions relating to the scan using the X-ray, and the power detector is used. When the remaining amount of the detected battery power is equal to or greater than the power consumption, it is determined that the scan can be executed, and the remaining amount of the recorded power is less than the power consumption, and the gantry device 10 electrically supplies the external power supply ES. When connected, charging of the battery is started in the standby state, and when the remaining amount of the power is less than the power consumption and the gantry device 10 is not electrically connected to the external power supply ES, the battery is charged. Display a message on the display. As a result, according to the X-ray CT apparatus 3, it is possible to avoid interruption of the scan due to insufficient battery level after the start of exposure to the subject P in the scan, and avoid unnecessary exposure to the subject P. can do.

Further, according to the portable X-ray CT apparatus 3 according to the first embodiment, when charging to the battery is started, the remaining amount of detected electric power, the calculated power consumption, and the charging speed are obtained. Based on the above, the time when the scan can be started is calculated, and the time when the scan can be started is displayed on the display. As a result, according to the X-ray CT apparatus 3, the user can be notified of the scannable time, so that the operability regarding the start of scanning can be improved.

Further, according to the portable X-ray CT device 3 according to the first embodiment, electric power is supplied from the battery to the moving fixing mechanism 26 when the gantry device 10 is moved and when the gantry device 10 is fixed to the floor surface. Supply. As a result, according to the X-ray CT device 3, power assist can be performed for the user regarding the transport and fixing of the gantry device 10, and the gantry device 10 can be efficiently transported and fixed.

From the above, according to the portable X-ray CT apparatus 3, it is possible to provide power assist for the transportation of the gantry device 10, the cost is low, and the operability related to the transportation can be improved. .. In addition, according to the X-ray CT device 3, the scan can be executed even during a power failure depending on the state of charge of the battery, so that unnecessary exposure can be reduced and the inspection efficiency can be improved.

(First modification)
In this modification, the second battery 23 in the first embodiment is not mounted on the gantry device 10. That is, the X-ray CT device 3 in this modification has a configuration in which the second battery 23 shown in FIG. 1 is removed. In other words, the battery is mounted on the rotating part. Regarding the power supply control process in this modification, the power transmission path for the state of the gantry device 10 is as shown in FIGS. 9 to 12. As shown in FIGS. 9, 11 and 12, when the gantry device 10 is in the charging state, the standby state, and the exposure state, the connection between the external power supply ES and the connector 214 leads to the fixed frame mounting device 221. Power is supplied. Regarding the following FIGS. 9 to 12, the part overlapping with FIGS. 3 to 6 will be omitted as appropriate.

FIG. 9 is a diagram showing an example of power transmission in a charged state of the first battery 20. The electric power input from the external power supply ES to the gantry device 10 via the connector 243 reaches the first battery 20 via the charge point CP. As a result, the first battery 20 is charged. Further, the electric power input from the external power supply ES to the gantry device 10 via the connector 243 is supplied to the fixed frame mounting device 221.

FIG. 10 is a diagram showing an example of electric power transmission in a transport state of the gantry device 10. As shown by the solid arrow in FIG. 10, in the transport state, the power supply control function 363 supplies power from the first battery 20 to the transport support unit via the charge point CP. That is, the power supply control function 363 supplies power to the fixed portion from the first battery 20 mounted on the rotating portion when the gantry device 10 is in the transport state. Further, as shown by the dotted line arrows in FIGS. 9 and 10, electric power is supplied to the rotating frame-mounted device 131 from the first battery 20 as needed.

FIG. 11 is a diagram showing an example of power transmission in the standby state of the gantry device 10. As shown by the solid arrow in FIG. 11, the power supply control function 363 energizes the fixed frame mounted device 221 from the external power supply ES. As shown by the dotted and solid arrows in FIG. 11, the power supply control function 363 is the first from the first battery 20 to the fixed frame mounted device 221 or from the external power supply ES via the charge point CP. Electric power may be supplied to the battery 20.

FIG. 12 is a diagram showing an example of power transmission in an X-ray exposure state in the gantry device 10. As shown by the solid arrow in FIG. 12, the electric power to the fixed frame mounting device 221 is supplied from the external power supply ES. In the X-ray exposure state, the rotating frame-mounted device 131 becomes electrically independent from the fixed frame 22, and the X-ray CT device 3 can operate without a slip ring.

As an application example of this modification, a slip ring may be provided between the rotating frame 13 and the fixed frame 22 instead of the charge point CP. At this time, the first contact 241 and the second contact 242 and the contact drive mechanism 24 become unnecessary. In this application example, electric power can be supplied from the first battery 20 to the fixed frame mounting device 221 even when the rotating frame 13 is rotating such as during exposure. Therefore, the power required by the fixed frame-mounted device 221 can be supplied regardless of the state of the gantry device 10. As a result, the slip ring in this application example can reduce the number of power supply channels as compared with the conventional slip ring, and the slip ring can be miniaturized.

FIG. 13 is a table showing a list of power supply destinations and power supply sources according to the state of the gantry device 10 with respect to FIGS. 9 to 12. The arrows, x marks, and "as needed" in FIG. 13 have the same meanings as in FIG. 7. As shown in FIG. 13, the connector 243 is electrically connected to the external power supply ES except when the gantry device 10 is in the transport state. As shown in FIGS. 13 and 11, the main difference between this modification and the first embodiment is that when the gantry device 10 is in the transport state, it is transported from the first battery 20 via the charge point CP. Power is to be supplied to the support unit.

The content of the procedure of the power supply control process when the gantry device 10 is in the standby state corresponds to the one in which the process relating to the second battery 23 is omitted in the description of the flowchart shown in FIG. Therefore, in this modification, the description of the procedure of the power supply control process when the gantry device 10 is in the standby state will be omitted.

According to the portable X-ray CT device 3 according to the first modification of the first embodiment described above, the number of batteries mounted can be reduced, so that the cost can be further reduced and the gantry device 10 can be improved. It is possible to realize the weight reduction. Since other effects are the same as the effects described in the first embodiment, the description thereof will be omitted.

(Second modification)
In this modification, the first battery 20 in the first embodiment is not mounted on the gantry device 10. That is, the battery is mounted on the fixed portion. Therefore, in this modification, power transmission to the rotating frame-mounted device 131 is required even when the rotating frame 13 is in the rotating state. As a result, in the X-ray CT apparatus 3 in this modification, a slip ring configuration is indispensable. That is, in the X-ray CT device 3 in this modification, the first battery 20, the first contact 241 and the second contact 242, and the contact drive mechanism 24 are removed from FIG. It has a slip ring arrangement.

Regarding the power supply control process in this modification, the power transmission path for the state of the gantry device 10 is as shown in FIGS. 14 to 16. As shown in FIGS. 14 and 16, when the state of the gantry device 10 is the charging state, the standby state, and the exposure state, the connection between the external power supply ES and the connector 243 causes the second battery 23 and the slip ring SR. Power is supplied to.

FIG. 14 is a diagram showing an example of power transmission in a charged state of the second battery 23. The electric power input from the external power supply ES to the gantry device 10 via the connector 243 reaches the second battery 23. As a result, the second battery 23 is charged. Further, the electric power input from the external power supply ES to the gantry device 10 via the connector 243 is applied to the rotating frame-mounted device 131 via the slip ring SR as needed, as shown by the dotted line arrow in FIG. Power is supplied from the external power supply ES.

FIG. 15 is a diagram showing an example of electric power transmission in a transport state of the gantry device 10. As shown by the solid arrow in FIG. 15, in the transport state, the power supply control function 363 supplies power to the transport support unit from the second battery 23. That is, the power supply control function 363 supplies power to both the fixed portion and the rotating portion when the gantry device 10 is in the transport state. Further, as shown by the dotted arrow in FIG. 15, power is supplied from the second battery 23 to the rotating frame-mounted device 131 via the slip ring SR, if necessary.

FIG. 16 is a diagram showing an example of power transmission in the standby state and the exposure state of the gantry device 10. As shown by the solid arrow in FIG. 16, the power supply control function 363 energizes the rotating frame-mounted device 131 from the external power supply ES via the slip ring SR. The second battery 23 also supplies power to the fixed frame mounted device 221.

FIG. 17 is a table showing a list of power supply destinations and power supply sources according to the state of the gantry device 10 with respect to FIGS. 14 to 16. The arrows, x marks, and "as needed" in FIG. 17 have the same meanings as in FIG. 7. As shown in FIG. 17, the connector 243 is electrically connected to the external power supply ES except when the gantry device 10 is in the transport state. As shown in FIGS. 17 and 15, the main difference between this modification and the first embodiment is that when the gantry device 10 is in the transport state, it is transported from the second battery 23 via the slip ring SR. Power is to be supplied to the support unit.

The content of the procedure of the power supply control process when the gantry device 10 is in the standby state corresponds to the one in which the process relating to the first battery 20 is omitted in the description of the flowchart shown in FIG. Therefore, in this modification, the description of the procedure of the power supply control process when the gantry device 10 is in the standby state will be omitted.

According to the portable X-ray CT device 3 according to the second modification of the first embodiment described above, as in the first modification, the electric power in the transported state with the minimum required battery mounted. Supply can be secured. Further, since the minimum power can be supplied to the unit that requires power in the event of a power failure, it is not necessary to add an uninterruptible power supply device to the outside as in the first embodiment and the first modification. The cost of the X-ray CT device 3 can be reduced. Since other effects are the same as the effects described in the first embodiment and the first modification, the description thereof will be omitted.

(Second embodiment)
The X-ray CT device in the present embodiment is a fixed type fixed to a hospital or the like. FIG. 18 is a diagram showing an example of the configuration of the fixed type X-ray CT device 2. The fixed X-ray CT device 2 in FIG. 18 includes a gantry device 9, a sleeper device 30, and a console device 6. Since the sleeper device 30 shown in FIG. 18 is the same as the sleeper device 30 in the portable X-ray CT device 3 shown in FIG. 1, the description thereof will be omitted. The gantry device 9 includes a mobile fixing mechanism 26, a first memory 27, a first display 28, a first input interface 29, a first processing circuit 36, and a gantry device 10 in the portable X-ray CT device 3. It is a configuration that does not have the first communication interface 35. The console device 6 has a memory 61, a display 62, an input interface 63, a processing circuit 64, and a communication interface 65.

The memory 61 has the functions and configurations described in the first memory 27, the second memory 42, and the third memory 52. Therefore, the description of the memory 61 will be omitted.

The display has the functions and configurations described in 62, the first display 28 and the second display 44. Therefore, the description of the display 62 will be omitted.

The input interface 63 has the functions and configurations described in the first input interface 29 and the second input interface 45. Therefore, the description of the input interface 63 will be omitted.

The processing circuit 64 has various functions in the first processing circuit 36, various functions in the second processing circuit 43, and various functions in the third processing circuit 53. In other words, the processing circuit 64 has various functions in the image generation device 5 shown in FIG. 1, various functions in the terminal device 40 shown in FIG. 1, and various functions realized by the first processing circuit 36. Therefore, the description of the processing circuit 64 will be omitted.

The communication interface 65 performs data communication with PACS, HIS, and RIS. The standard for communication by the communication interface 65 may be any standard, and examples thereof include HL7, DICOM, or both. The communication interface 65 outputs data acquired by data communication with various devices to the memory 61. Further, the communication interface 65 outputs various medical images, examination orders, scan plans, etc. acquired by communication with PACS, HIS, and RIS to the memory 61.

The power supply control process in the present embodiment conforms to the first embodiment except for the transport state of the gantry device 9. The electric power to the fixed type X-ray CT device 2 is always supplied from the external power supply ES. Therefore, in the charged state, the standby state, and the exposure state of the gantry device 9, the power supply to the fixed frame mounting device 221 and the console device 6 is a combined use of the second battery 23 and the external power supply ES. That is, the power supply control process is substantially the same as that in FIGS. 3 and 5 to 8 (excluding the transport state in FIG. 7). For these reasons, the procedure and effect of the power supply control process in the second embodiment are the same as those in the first embodiment except for the description regarding the transport state, and thus the description thereof will be omitted.

(Third modification example)
In this modification, the second battery 23 in the second embodiment is not mounted on the gantry device 9. Since the procedure and effect of the power supply control process in this modification are the same as those in the first modification except for the description regarding the transport state, the description thereof will be omitted.

(Fourth modification)
In this modification, the first battery 20 in the second embodiment is not mounted on the gantry device 9. Therefore, in this modification, power transmission to the rotating frame-mounted device 131 is required even when the rotating frame 13 is in the rotating state. As a result, in the X-ray CT device 2 in this modification, the configuration of the slip ring becomes indispensable. That is, in the X-ray CT device 2 in this modification, the first battery 20, the first contact 241 and the second contact 242, and the contact drive mechanism 24 are removed from FIG. 18, and the rotation frame 13 and the fixed frame 22 are separated from each other. It has a slip ring arrangement. Since the procedure and effect of the power supply control process in this modification are the same as those in the second modification except for the description regarding the transport state, the description thereof will be omitted.

When the technical idea in the embodiment is realized by the power supply control method, the power supply control method consumes power consumed by the execution of the scan based on the scan conditions relating to the execution of the scan of the subject P by X-rays. To be at least one of a rotating frame 13 that supports the X-ray tube 11 that generates X-rays and rotates along the circumferential direction of the opening, and a fixed frame 22 that rotatably supports the rotating frame 13. If the remaining power of the mounted battery is greater than or equal to the power consumption, it is determined that the scan is feasible, the remaining power is less than the power consumption, and the rotating frame 13 and the fixed frame 22 are mounted. When the gantry device 10 is connected to the external power supply ES, charging of the battery is started in the standby state of the scan, the remaining power is less than the power consumption, and the gantry device 10 is connected to the external power supply ES. If not connected, display a message prompting you to charge the battery. Since the procedure and effect of the power supply control process executed by the power supply control method are the same as those in the first embodiment, the description thereof will be omitted.

When the technical idea in the embodiment is realized by a control method, the control method includes a step of detecting the state of the movable gantry device 10 for performing X-ray computer tomography and charging of the battery mounted on the gantry device 10. A device mounted on the rotating frame 13 of the pedestal device 10 and a device mounted on the fixed frame 22 of the pedestal device 10 based on the step of detecting the state, the detected state of the gantry device 10, and the state of charge of the battery. It has a step to control the supply of power from the battery to and to. Since the procedure and effect of the power supply control process executed by the control method are the same as those in the first embodiment, the description thereof will be omitted.

When the technical idea in the embodiment is realized by the power supply control program, the power supply control program is consumed by the computer based on the scan conditions for performing the scan on the subject P by X-rays. At least of a rotating frame 13 that calculates power consumption, supports an X-ray tube 11 that generates X-rays, and rotates along the circumferential direction of the opening, and a fixed frame 22 that rotatably supports the rotating frame 13. If the remaining amount of power in one of the batteries is greater than or equal to the power consumption, it is determined that the scan is feasible, the remaining amount of power is less than the power consumption, and the rotating frame 13 and the fixed frame 22 are used. When the gantry device 10 equipped with the above is connected to the external power supply ES, charging of the battery is started in the standby state of scanning, the remaining amount of power is less than the power consumption, and the gantry device 10 is connected to the external power supply ES. When not connected, it realizes that a message prompting the battery to be charged is displayed on the display.

For example, a power supply control program is installed in a computer in an X-ray CT device equipped with a battery, a server device (processing device) related to power supply control of the X-ray CT device, a terminal device 40, and the like, and these are expanded on a memory. This also makes it possible to realize the power supply control process. At this time, the program that allows the computer to execute the method can be stored and distributed in a storage medium such as a magnetic disk (hard disk, etc.), an optical disk (CD-ROM, DVD, etc.), or a semiconductor memory. .. Since the processing procedure and the effect in the power supply control program are the same as those in the first embodiment, the description thereof will be omitted.

As another embodiment, the X-ray CT device 3 does not have to have the sleeper device 30. For example, when the opening of the gantry device 10 of the X-ray CT device 3 has a substantially cylindrical shape extending in the vertical direction, the subject is photographed in a standing position, so that the sleeper device 30 is unnecessary.

As another embodiment, even when the battery is not mounted on the rotating portion including the rotating frame 13 and the battery is mounted on the fixed portion including the fixed frame 22, the rotating portion is in the transport state when the gantry device 10 is in the transport state. May be supplied with power. For example, it may be convenient to partially put an electrical unit such as a detector of a rotating portion, a DAS, etc. into a predetermined standby / power saving state.

According to at least one embodiment and modifications described above, it is possible to provide an X-ray computer tomography apparatus that can be operated in the event of a power failure and can reduce costs.

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 embodiments, and various omissions, replacements, changes, and combinations of embodiments can be made without departing from the gist of the invention. These embodiments and variations thereof are included in the scope of the invention described in the claims and the equivalent scope thereof, as are included in the scope and gist of the invention.

1 X-ray CT system 2 X-ray CT device 3 X-ray CT device 4 Network 5 Server device (image generator)
6 Console device 9 Mount device 10 Mount device 11 X-ray tube 12 X-ray detector 13 Rotating frame 14 X-ray high voltage device 15 Control device 16 Wedge 17 Collimator 18 DAS (Data Acquisition System)
20 1st battery 21 1st power detector 22 Fixed frame 23 2nd battery 24 Contact drive mechanism 25 2nd power detector 26 Mobile fixing mechanism 27 1st memory 28 1st display 29 1st input interface 30 Sleeper Device 31 Base 32 Sleeper drive device 33 Top plate 34 Top plate support frame 35 1st communication interface 36 1st processing circuit 40 Terminal device 41 2nd communication interface 42 2nd memory 43 2nd processing circuit 44 2nd display 45 2nd Input interface 51 3rd communication interface 52 3rd memory 53 3rd processing circuit 61 Memory 62 Display 63 Input interface 64 Processing circuit 65 Communication interface 131 Rotating frame mounted device 221 Fixed frame mounted device 241 1st contact 242 2nd contact 243 Connector 361 System control function 362 Preprocessing function 363 Power supply control function 431 Terminal control function 432 Display function 531 Reconstruction function 532 Image generation function

Claims (12)

At least one of a rotating portion including a rotating frame that supports an X-ray tube that generates X-rays and rotates along the circumferential direction of the opening, and a fixed portion that includes a fixed frame that rotatably supports the rotating frame. With the battery installed in
Power supply that controls the supply of electric power from the battery to the device mounted on the rotating frame and the device mounted on the fixed frame based on the state of the gantry device including the rotating portion and the fixed portion. Control unit and
X-ray computer tomography equipment equipped with. Further equipped with a power detector for detecting the remaining amount of power in the battery,
The power supply control unit is
The power consumption consumed by the scan is calculated based on the scan conditions related to the scan using the X-ray.
If the remaining amount of power is equal to or greater than the power consumption, it is determined that the scan is feasible, and the scan is determined.
When the remaining amount of electric power is less than the power consumption and the gantry device on which the rotating frame and the fixed frame are mounted is electrically connected to an external power source, the battery is supplied to the battery in the standby state of the scan. Start charging,
When the remaining amount of electric power is less than the power consumption and the gantry device is not electrically connected to the external power source, a message prompting the battery to be charged is displayed on the display.
The X-ray computer tomography apparatus according to claim 1. The power supply control unit is
When charging of the battery is started, the time at which the scan can be started is calculated based on the remaining amount of power, the power consumption, and the charging speed.
The display shows the time when the scan can be started.
The X-ray computer tomography apparatus according to claim 2. The X-ray computer tomography apparatus is portable and has
It is provided in the gantry device on which the rotating frame and the fixed frame are mounted, and further includes a movable fixing mechanism capable of moving and fixing the gantry device.
The power supply control unit supplies electric power from the battery to the moving fixing mechanism when the gantry device is moved and when the gantry device is fixed to the floor surface.
The X-ray computer tomography apparatus according to any one of claims 1 to 3. The rotating frame mounts the battery and a first contact electrically connected to the battery.
The fixed frame is equipped with a second contact that can be electrically connected to an external power source.
When charging the battery, a contact drive mechanism for bringing the first contact into contact with the second contact is further provided.
The power supply control unit is in a standby state for scanning using the X-rays.
When charging the battery, the rotating frame is rotated to a position where the first contact and the second contact face each other so as to face each other.
The contact drive mechanism is controlled so that the first contact and the second contact are brought into contact with each other when the rotating frame reaches the facing position.
The X-ray computer tomography apparatus according to any one of claims 1 to 4. The X-ray computer tomography apparatus according to any one of claims 1 to 5, wherein the battery is mounted on the rotating portion. The X-ray according to claim 6, wherein the power supply control unit supplies power to the fixed portion from a battery mounted on the rotating portion when the gantry device is in a transporting state. Computer tomography equipment. The X-ray computer tomography apparatus according to any one of claims 1 to 5, wherein the battery is mounted on each of the rotating portion and the fixed portion. The X-ray computer tomography apparatus according to claim 8, wherein the power supply control unit supplies electric power between the battery of the rotating portion and the battery of the fixed portion according to a situation. The X-ray computer tomography apparatus according to any one of claims 1 to 5, wherein the battery is mounted on the fixed portion. The X-ray computer tomography apparatus according to claim 10, wherein the battery of the fixed portion supplies electric power to both the fixed portion and the rotating portion when the gantry device is in a conveyed state. Steps to detect the state of a movable gantry device that performs X-ray computer tomography,
A step of detecting the charge state of the battery mounted on the gantry device, and
Power from the battery to a device mounted on a rotating frame of the pedestal and a device mounted on a fixed frame of the pedestal based on the detected state of the gantry and the state of charge of the battery. And the steps to control the supply of
Control method having.

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