WO2021241595A1 - Appareil de tomodensitométrie par rayons x, procédé de commande d'appareil de tomodensitométrie par rayons x, et programme - Google Patents

Appareil de tomodensitométrie par rayons x, procédé de commande d'appareil de tomodensitométrie par rayons x, et programme Download PDF

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Publication number
WO2021241595A1
WO2021241595A1 PCT/JP2021/019861 JP2021019861W WO2021241595A1 WO 2021241595 A1 WO2021241595 A1 WO 2021241595A1 JP 2021019861 W JP2021019861 W JP 2021019861W WO 2021241595 A1 WO2021241595 A1 WO 2021241595A1
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WIPO (PCT)
Prior art keywords
exhaust
ray
air
housing
fan
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PCT/JP2021/019861
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English (en)
Japanese (ja)
Inventor
康平 青木
ゴンティン タン
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キヤノンメディカルシステムズ株式会社
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Priority claimed from CN202011573038.XA external-priority patent/CN114224370A/zh
Application filed by キヤノンメディカルシステムズ株式会社 filed Critical キヤノンメディカルシステムズ株式会社
Priority to JP2021569995A priority Critical patent/JPWO2021241595A1/ja
Priority to CN202180002992.XA priority patent/CN116018094A/zh
Publication of WO2021241595A1 publication Critical patent/WO2021241595A1/fr

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    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B6/00—Apparatus or devices for radiation diagnosis; Apparatus or devices for radiation diagnosis combined with radiation therapy equipment
    • A61B6/02—Arrangements for diagnosis sequentially in different planes; Stereoscopic radiation diagnosis
    • A61B6/03—Computed tomography [CT]

Definitions

  • an X-ray CT (Computed Tomography) device that reconstructs captured data while rotating a pair of an X-ray tube and an X-ray detector at high speed around a subject to generate a tomographic image of the subject.
  • the X-ray tube and the X-ray detector are fixed to a substantially cylindrical rotating frame in which a bore, which is an imaging space for a subject, is formed in the center.
  • the rotating frame includes a power supply device that supplies high-voltage power to the X-ray tube, an oil cooler that exchanges heat for oil cooling of the X-ray tube, and an X-ray detector.
  • Various gantry devices such as a data collection device called DAS (Data Acquisition System) that converts a large number of output electric signals into digital signals and transmits them to the main body of the device are fixed.
  • DAS Data Acquisition System
  • the rotating frame on which these devices are installed is housed in a housing having a substantially cylindrical shape with a bore formed in the center. Since many of the devices mounted on the rotating frame generate heat when energized, it is necessary to cool each device. Therefore, in the X-ray CT device, the device is cooled by taking in external air into the housing, forcibly flowing the taken-in air into the housing as cooling air, and exhausting the air warmed by heat exchange from the housing. doing. However, depending on the flow of air in the device, the warmed air after cooling the device may flow in the housing in various directions. Therefore, the heat exhaust efficiency of the device may decrease.
  • One of the problems to be solved by the embodiments disclosed in the present specification and the drawings is to improve the heat exhaust efficiency of each device provided in the rotating frame of the X-ray CT apparatus.
  • 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 CT apparatus is an X-ray CT apparatus that photographs a subject placed on a bed device, and controls a rotating frame, a housing, a first exhaust unit, and a second exhaust unit.
  • the rotating frame is fixed to one or more devices.
  • the housing houses the rotating frame.
  • One or more first exhaust units exhaust the air in the rotating frame.
  • One or more second exhaust sections exhaust the air in the housing.
  • the control unit controls the drive of the one or more first exhaust units and the one or more second exhaust units. Further, the control unit has the one or more first exhaust units and the control unit so that the total displacement of air by the one or more first exhaust units and the total exhaust amount of air by the one or more second exhaust units are close to each other. It controls the drive of the one or more second exhaust units.
  • FIG. 1 is a diagram showing an example of the configuration of the X-ray CT apparatus according to the first embodiment.
  • FIG. 2 is a cross-sectional view of the XY plane when the gantry device is viewed from the front direction (Z-axis direction).
  • FIG. 3 is a cross-sectional view of a YZ plane when the gantry device is viewed from the side (X-axis direction) in the X-ray CT device according to the first embodiment.
  • FIG. 4 is a diagram schematically showing the air flow inside the gantry device with thick black arrows in the X-ray CT device according to the first embodiment.
  • FIG. 1 is a diagram showing an example of the configuration of the X-ray CT apparatus according to the first embodiment.
  • FIG. 2 is a cross-sectional view of the XY plane when the gantry device is viewed from the front direction (Z-axis direction).
  • FIG. 3 is a cross-sectional view of a YZ plane when the gantry device
  • FIG. 5 is a view of the air flow inside the gantry device in the X-ray CT device according to the first embodiment as viewed from the side in the Y'-Y "cross section of FIG.
  • FIG. 6 is a schematic diagram for explaining the air flow and temperature when the first displacement is larger than the second displacement.
  • FIG. 7 is a diagram for explaining the flow of air in the housing when the first displacement is larger than the second displacement.
  • FIG. 8 is a schematic diagram for explaining the air flow and temperature when the second displacement is larger than the first displacement.
  • FIG. 9 is a diagram for explaining the flow of air in the housing when the second displacement is larger than the first displacement.
  • FIG. 10 is a diagram showing an example of a configuration of a fan control function in the X-ray CT apparatus according to the first embodiment.
  • FIG. 10 is a diagram showing an example of a configuration of a fan control function in the X-ray CT apparatus according to the first embodiment.
  • FIG. 11 is a diagram for explaining the contents of the fan rotation speed control table in the X-ray CT apparatus according to the first embodiment.
  • FIG. 12 is a flowchart showing an example of the flow of processing executed by the X-ray CT apparatus according to the first embodiment.
  • FIG. 13 is a diagram for explaining the inside of the housing in the X-ray CT apparatus according to the second embodiment.
  • FIG. 14 is a diagram showing an example of a configuration of a fan control function in the X-ray CT apparatus according to the second embodiment.
  • FIG. 15 is a flowchart showing an example of the flow of processing executed by the X-ray CT apparatus according to the second embodiment.
  • FIG. 12 is a flowchart showing an example of the flow of processing executed by the X-ray CT apparatus according to the first embodiment.
  • FIG. 13 is a diagram for explaining the inside of the housing in the X-ray CT apparatus according to the second embodiment.
  • FIG. 14 is a diagram showing an example of a configuration of a fan control function in the
  • FIG. 16 is a cross-sectional view of a YZ plane when the gantry device is viewed from the side (X-axis direction) in the X-ray CT device according to the third embodiment.
  • FIG. 17 is a cross-sectional view of a YZ plane when the gantry device is viewed from the side (X-axis direction) in the X-ray CT device according to the first modification of the third embodiment.
  • FIG. 18 is a cross-sectional view of a YZ plane when the gantry device is viewed from the side (X-axis direction) in the X-ray CT device according to the second modification of the third embodiment.
  • FIG. 19 is a schematic perspective view showing the internal structure of the X-ray CT apparatus according to the fourth embodiment.
  • FIG. 19 is a schematic perspective view showing the internal structure of the X-ray CT apparatus according to the fourth embodiment.
  • FIG. 20 is a cross-sectional view of the X-ray CT apparatus according to the fourth embodiment as viewed from the side.
  • FIG. 21 is a perspective view showing a rotating frame of the X-ray CT apparatus of the X-ray CT apparatus according to the fourth embodiment.
  • FIG. 22 is a schematic perspective view showing a guide cover of the X-ray CT apparatus according to the fourth embodiment.
  • FIG. 23A is a schematic view showing the internal structure of the X-ray CT apparatus according to the first modification of the fourth embodiment.
  • FIG. 23B is a schematic view showing the internal structure of the X-ray CT apparatus according to the first modification of the fourth embodiment.
  • FIG. 24 is a schematic view showing the internal configuration of the X-ray CT apparatus according to the second modification of the fourth embodiment.
  • FIG. 1 is a diagram showing an example of the configuration of the X-ray CT apparatus 1 according to the first embodiment.
  • the X-ray CT device 1 includes, for example, a gantry device 10, a sleeper device 30, and a console device 40.
  • the gantry device 10 includes, for example, a rotating frame 13 and various devices (components) such as an X-ray generator 20, an X-ray high voltage device 21, and an X-ray detecting device 25 mounted and fixed to the rotating frame 13. Have.
  • various devices such as an X-ray generator 20, an X-ray high voltage device 21, and an X-ray detecting device 25 mounted and fixed to the rotating frame 13.
  • the direction of the rotation axis of the rotation frame 13 when the rotation frame 13 is not tilted, or the longitudinal direction of the top plate 33 of the bed device 30 is the Z-axis direction, and the Z-axis direction.
  • the axial direction orthogonal to the floor surface and horizontal to the floor surface is defined as the X-axis direction
  • the axial direction orthogonal to the Z-axis direction and perpendicular to the floor surface is defined as the Y-axis direction.
  • the X-ray generator 20 includes, for example, an X-ray tube 11, a wedge 16, and a collimator 17.
  • the X-ray tube 11 is a vacuum tube that generates X-rays by applying a high voltage from the X-ray high voltage device 21.
  • the X-rays emitted from the X-ray tube 11 pass through the wedge 16 and the collimator 17, then pass through the subject P and reach the X-ray detector 25.
  • the wedge 16 is a filter for adjusting the X-ray dose emitted from the X-ray tube 11.
  • the wedge 16 is a filter that attenuates the X-rays emitted from the X-ray tube 11 so that the X-rays exposed from the X-ray tube 11 to the subject P have a predetermined distribution.
  • the wedge 16 is formed by processing aluminum.
  • the collimator 17 is for narrowing the irradiation range of X-rays transmitted through the wedge 16, and is sometimes called an X-ray movable diaphragm.
  • the collimator 17 narrows down the irradiation range of X-rays by forming a slit by, for example, a combination of a plurality of lead plates and the like.
  • the X-ray detector 25 includes, for example, an X-ray detector 12 and a DAS (Data Acquisition System) 18.
  • the X-ray detector 12 detects the X-ray that has passed through the subject P and converts it into an electric signal corresponding to the X-ray dose.
  • the X-ray detector 12 has an X-ray detection element array in which a plurality of X-ray 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 a structure in which a plurality of X-ray detection element sequences are arranged in a slice direction orthogonal to the channel direction.
  • the X-ray detector 12 includes, for example, a grid, a scintillator array, and an optical sensor array.
  • 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 is sometimes referred to as a collimator (one-dimensional collimator or two-dimensional collimator).
  • a scintillator array is an array of a plurality of scintillators. Each scintillator has a scintillator crystal that outputs a photon amount of light according to the incident X-ray dose.
  • An optical sensor array is an array of a plurality of optical sensors.
  • Each optical sensor converts an electric signal according to the amount of light output from the scintillator.
  • the X-ray detector 12 may have a configuration including a semiconductor element that directly converts incident X-rays into an electric signal, instead of the configuration of the scintillator and the optical sensor described above.
  • the DAS (Data Acquisition System) 18 includes, for example, an amplifier circuit, an AD conversion circuit, a data transfer circuit, and the like.
  • the electric signal output from each X-ray detection element of the X-ray detector 12 is amplified by an amplifier circuit and then converted from an analog signal to a digital signal by an AD conversion circuit to generate detection data.
  • the detection data generated by the DAS 18 is provided, for example, in the non-rotating portion of the gantry device 10 (for example, the fixed frame 14 shown in FIG. 3) by optical communication from a transmitter having a light emitting diode (LED) provided in the rotating frame 13. It is transmitted to a receiver having a photodiode and transferred to the console device 40.
  • the fixed frame 14 is a frame that rotatably supports the rotating frame 13.
  • 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 optical communication, and any method may be adopted as long as it is a non-contact type data transmission.
  • the control device 15 includes, for example, a processor provided on a control board, a storage circuit, and a drive mechanism such as a motor and an actuator.
  • the control device 15 has a function of receiving an input signal from the input interface 43 of the console device 40 or an input interface (not shown) provided in the gantry device 10 to control the gantry device 10 and the sleeper device 30.
  • the control device 15 controls to rotate the rotating frame 13 based on the received input signal, controls to circulate the air in the housing by intake and exhaust to the housing for accommodating the rotating frame 13 and the rotating frame 13, and a gantry device.
  • the control for tilting the 10 and the control for operating the sleeper device 30 and the top plate 33 are performed.
  • the control device 15 may be provided in the gantry device 10 or the console device 40 as shown in FIG.
  • the sleeper device 30 is a device for placing and moving the subject P, which is an X-ray imaging target (scan target).
  • the sleeper device 30 includes, for example, a base 31, a sleeper drive device 32, a top plate 33, and a support frame 34.
  • the base 31 is a housing that movably supports the support frame 34 in the vertical direction (Y-axis 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 (Z-axis direction) of the top plate 33.
  • the top plate 33 provided on the upper part of the support frame 34 is a plate on which the subject P is placed.
  • the sleeper drive device 32 may move the support frame 34 in the long axis direction (Z-axis direction) of the top plate 33. Further, the sleeper drive device 32 may be moved together with the base 31 of the sleeper device 30.
  • a moving device for moving the subject P in a standing state is provided instead of the bed device 30.
  • the console device 40 has, for example, a memory 41, a display 42, an input interface 43, a network connection circuit 44, and a processing circuit 50.
  • the memory 41 is an example of a “storage unit”.
  • the console device 40 may be separate from the gantry device 10, and the gantry device 10 may include some or all of the components of the console device 40. Further, in the following description, it is assumed that the console device 40 executes all the functions on a single console, but these functions may be realized by using a plurality of consoles.
  • the memory 41 is realized by, for example, a RAM (Random Access Memory), a semiconductor memory element such as a flash memory, a hard disk, an optical disk, or the like.
  • the memory 41 stores, for example, the fan rotation speed control table 41-1 and the like.
  • the fan rotation speed control table 41-1 the rotation speed of the fan of the first exhaust unit provided on the rotation frame 13 side and the rotation speed of the fan of the second exhaust unit provided on the housing side for accommodating the rotation frame 13 are set. It is a corresponding table associated with each other. The contents of the fan rotation speed control table 41-1 will be described later.
  • the memory 41 may store, for example, detection data, projection data, reconstructed image, CT image, etc. acquired by the X-ray CT apparatus 1.
  • These data may be stored in an external memory with which the X-ray CT apparatus 1 can communicate, instead of the memory 41 (or in addition to the memory 41).
  • the external memory is controlled by the cloud server, for example, when the cloud server that manages the external memory receives a read / write request from the console device 40.
  • the display 42 displays various information.
  • the display 42 outputs a medical image (CT image) generated by the processing circuit 50, a GUI (Graphical User Interface) for receiving various operations (for example, an operation mode instruction) from the user, and the like.
  • CT image medical image
  • GUI Graphic User Interface
  • the display 42 is, for example, a liquid crystal display, a CRT (Cathode Ray Tube) display, an OLED (Organic Light Emitting Diode) display, or the like.
  • the display 42 may be provided on the gantry device 10.
  • the display 42 may be a desktop type, or may be configured by a tablet terminal or the like capable of wireless communication with the main body of the console device 40.
  • the input interface 43 receives various input operations from the user and outputs information related to the received input operations to the processing circuit 50.
  • the operation mode is, for example, a scan mode for the subject P.
  • the scan mode includes, for example, control information of each component of the gantry device 10, the sleeper device 30, and the processing circuit 50 at the time of scanning (during X-ray photography).
  • Scan modes include, for example, helical scans and step-and-shoot scans.
  • Helical scan is a scan mode in which the rotating frame 13 is rotated while the top plate 33 is moved to spirally scan the subject P.
  • the step-and-shoot scan is a scan mode in which the position of the top plate 33 is moved at regular intervals to perform a conventional scan in a plurality of scan areas.
  • the control information may include, for example, information regarding the amount of X-ray exposure during scanning, the rotation speed of the rotation frame 13, and the like. Further, the control information includes, for example, a collection condition when collecting projection data, a reconstruction condition when reconstructing a CT image, an image processing condition when generating a post-processed image from a CT image, and the like. May be good.
  • the operation mode may include a standby mode (standby mode) before starting scanning.
  • the input interface 43 uses a mouse, a keyboard, a trackball, a switch, a button, a joystick, a touch pad for performing an input operation by touching an operation surface, a touch screen in which a display screen and a touch pad are integrated, and an optical sensor. It is realized by a non-contact input circuit, a voice input circuit, and the like. Further, the input interface 43 may be provided in the gantry device 10. Further, the input interface 43 may be configured by a tablet terminal or the like capable of wireless communication with the main body of the console device 40.
  • the network connection circuit 44 implements various information and communication protocols according to the form of the network.
  • the network connection circuit 44 connects the X-ray CT apparatus 1 to another device such as an image server according to the various protocols.
  • An electrical connection or the like via an electronic network can be applied to this connection.
  • the electronic network means the entire information communication network using telecommunications technology, and in addition to the wireless / wired hospital backbone LAN (Local Area Network) and the Internet network, the telephone communication line network, the optical fiber communication network, and the cable. Communication networks, satellite communication networks, etc. are included.
  • the processing circuit 50 controls the overall operation of the X-ray CT apparatus 1.
  • the processing circuit 50 includes, for example, a system control function 51, a fan control function 52, a preprocessing function 53, a reconstruction processing function 54, and an image processing function 55.
  • the processing circuit 50 realizes these functions, for example, by the hardware processor executing a program stored in the memory (storage circuit) 41.
  • the hardware processor is, for example, a CPU (Central Processing Unit), a GPU (Graphics Processing Unit), an integrated circuit for a specific application (Application Specific Integrated Circuit; ASIC), a programmable logic device (for example, a simple programmable logic device (Simple Programmable Logic)). It means a circuit (circuitry) such as a device (SPLD) or a complex programmable logic device (Complex Programmable Logic Device; CPLD), a field programmable gate array (Field Programmable Gate Array; FPGA)).
  • the program may be configured to be directly embedded in the circuit of the hardware processor. In this case, the hardware processor realizes the function by reading and executing the program embedded in the circuit.
  • the above program may be stored in the memory 41 in advance, or may be stored in a non-temporary storage medium such as a DVD or a CD-ROM, and the non-temporary storage medium is the drive device (the drive device of the ultrasonic diagnostic apparatus 100). It may be installed in the memory 41 from a non-temporary storage medium by being attached to the memory 41 (not shown).
  • the hardware processor is not limited to the one configured as a single circuit, but may be configured as one hardware processor by combining a plurality of independent circuits to realize each function. Further, a plurality of components may be integrated into one hardware processor to realize each function.
  • the fan control function 52 is an example of a “control unit”.
  • Each component of the console device 40 or the processing circuit 50 may be decentralized and realized by a plurality of hardware.
  • the processing circuit 50 may be realized not by the configuration of the console device 40 but by a processing device capable of communicating with the console device 40.
  • the processing device is connected to, for example, a workstation connected to one X-ray CT device or a plurality of X-ray CT devices, and collectively executes the same processing as the processing circuit 50 described below (for example,). , Cloud server).
  • the system control function 51 controls various functions of the processing circuit 50 based on an input operation (for example, an operation mode instruction) received by the input interface 43.
  • the system control function 51 controls the control device 15, the DAS 18, the X-ray high voltage device 21, and the sleeper drive device 32 to execute the detection data collection process in the gantry device 10. Further, the system control function 51 controls the operation of each part when taking a picture for collecting scanned images and taking an image used for diagnosis.
  • the fan control function 52 includes the rotation speed of the fan of the first exhaust unit, which will be described later, provided on the rotating frame 13 side, and the rotation speed of the fan of the second exhaust unit, which will be described later, provided on the housing 300 (see FIGS. 2 and 3). By controlling the number, the total displacement by the first exhaust section (hereinafter referred to as the first displacement) and the total displacement by the second exhaust section (hereinafter referred to as the second displacement) are controlled. .. The details of the fan control function 52 will be described later.
  • the preprocessing function 53 performs preprocessing such as logarithmic conversion processing, offset correction processing, sensitivity correction processing between channels, and beam hardening correction on the detection data output by DAS18 to generate projection data. Further, the preprocessing function 53 may store the generated projection data in the memory 41.
  • the reconstruction processing function 54 generates a CT image by performing reconstruction processing on the projection data generated by the preprocessing function 53 by a filter correction back projection method, a successive approximation reconstruction method, or the like. Further, the reconstruction processing function 54 may store the generated CT image in the memory 41.
  • the image processing function 55 converts a CT image into a three-dimensional image or cross-sectional image data of an arbitrary cross section by a known method based on the input operation received by the input interface 43.
  • the conversion to a three-dimensional image may be performed by the preprocessing function 53.
  • the image processing function 55 may analyze the image of the cross-sectional image data and classify the body shape or the like of the subject P based on the analysis result.
  • the X-ray CT apparatus 1 performs a main scan of the subject P in a format such as a helical scan or a step-and-shoot scan based on an operation mode or the like.
  • the helical scan is a mode in which the rotating frame 13 is rotated while the top plate 33 is moved to spirally scan the subject P.
  • the step-and-shoot scan is an embodiment in which the position of the top plate 33 is moved at regular intervals to perform a conventional scan in a plurality of scan areas.
  • FIG. 2 is a cross-sectional view of the XY plane when the gantry device 10 is viewed from the front direction (Z-axis direction).
  • FIG. 3 is a cross-sectional view of the YZ plane when the gantry device 10 is viewed from the side (X-axis direction).
  • FIG. 3 is a side view of the Y'-Y "cross section of FIG. 2. The left side of FIG. 3 corresponds to the front side of the gantry device 10, and the right side corresponds to the rear side of the gantry device 10.
  • the front direction of the gantry device 10 (or the front side of the gantry device 10) is the direction in which the bed device 30 is installed with respect to the gantry device 10 (or the side on which the bed device 30 is installed).
  • the rear direction (or the rear side of the gantry device 10) of the gantry device 10 is the direction opposite to (or the opposite side) of the front direction.
  • the device 200 includes, for example, an X-ray generator 20, an X-ray high voltage device 21, an X-ray detection device 25, and various devices such as an oil cooler and a power supply device that rotate integrally with the rotating frame 13. .
  • a device 200 corresponding to an X-ray generator 20 is attached to the upper part of the rotating frame 13, and a device 200 corresponding to an X-ray detecting device 25 is attached to the lower part of the rotating frame 13.
  • device 200 unless it is necessary to distinguish between the types, each of these devices is simply referred to as "device 200".
  • the rotating frame 13 is a frame body (frame body) in which a bore 400 is formed in the center and the shape of the outer periphery thereof is substantially cylindrical.
  • the bore 400 is a space in which the subject is transported at the time of photographing.
  • the bore 400 penetrates from the front side to the rear side of the gantry device 10.
  • the rotating frame 13 is formed with holes and recesses for mounting each device 200.
  • Each device 200 mounted on the rotating frame 13 may be fixed to the rotating frame 13 by a fixing means or the like so as to sufficiently withstand high-speed rotation.
  • the rotating frame 13 to which each device 200 is mounted or fixed is housed in the housing 300 from the viewpoint of safety and the like.
  • the housing 300 also has a substantially cylindrical shape with a bore 400 formed in the center.
  • the housing 300 itself does not rotate, but the rotating frame 13 housed in the housing 300 rotates integrally with each device 200. Since the rotating frame 13 and each device 200 are surrounded by the housing 300, they are not actually visible from the outside. In the example of FIG. 2, in order to show the internal structure of the housing 300, the front side portion of the housing 300 is excluded.
  • a fixed frame 14 is provided on the rear side of the rotating frame 13 as shown in FIG.
  • the fixed frame 14 also has a cylindrical shape with a bore 400 formed in the center.
  • the fixed frame 14 is tiltably supported by an upright frame (not shown) extending from the floor surface.
  • a direct drive motor including an annular rotor and a stator is provided between the fixed frame 14 and the rotating frame 13, for example. Further, between the fixed frame 14 and the rotating frame 13, an annular slip ring that supplies electric power from the fixed frame 14 side to the rotating frame 13 side, or between the fixed frame 14 side and the rotating frame 13 side, A communication device for performing non-contact data communication such as optical communication is provided.
  • each device 200 is arranged in the annular space of the rotating frame 13. Further, as shown in FIG. 3, each device 200 is arranged between the first surface 410 and the second surface 420, which are parallel to each other and orthogonal to the rotation axis 430 of the rotation frame 13.
  • the first surface 410 is, for example, an annular virtual plane in contact with the front end on the front side of the rotating frame 13
  • the second surface 420 is, for example, an annular virtual plane in contact with the rear end on the rear side of the rotating frame 13. It is a virtual plane.
  • the X-ray CT apparatus 1 includes, for example, a first intake unit 210 and a first exhaust unit 220 in a housing of each device 200 that requires cooling, and is taken in from the outside. Heat is exhausted by exchanging heat between the air and each device 200.
  • One or more of the first intake unit 210 and the first exhaust unit 220 are provided in the device 200, respectively.
  • the first intake unit 210 and the first exhaust unit 220 may predict the calorific value during operation of each device 200 in advance, and the quantity may be determined according to the predicted calorific value.
  • the first intake unit 210 is, for example, an intake port for sucking air flowing in the housing 300 into the inside of each device 200. Further, the first exhaust unit 220 includes one or more fans (that is, an exhaust fan) for forcibly exhausting the air warmed inside the device 200 to the outside of the device 200.
  • the first exhaust unit 220 includes one or more fans (that is, an exhaust fan) for forcibly exhausting the air warmed inside the device 200 to the outside of the device 200.
  • the first intake unit 210 is provided in the housing of each device 200 on the first surface 410 side, that is, on the side where the second intake unit 310 of the housing 300 is arranged.
  • the first exhaust portion 220 is provided in the housing of each device 200 on the second surface 420 side, that is, on the side where the second exhaust portion 320 of the housing 300 is arranged.
  • the first intake unit 210 is provided on the front side of the housing of each device 200, and the first exhaust unit 220 is provided on the rear side.
  • the second intake unit 310 for sucking external air and the air sucked into the housing 300 are introduced into the housing 300.
  • a second exhaust unit 320 for exhausting is provided.
  • the second intake unit 310 is, for example, an intake port for sucking external air into the inside of the housing 300.
  • the second exhaust unit 320 includes one or more fans (that is, an exhaust fan) for forcibly exhausting the air warmed by the heat of each device 200 to the outside of the housing 300.
  • the second intake portion 310 is arranged on the outer peripheral portion of the housing 300, is located at the position on the first surface 410 side of the housing 300, and is provided at the first end portion which is one end portion in the radial direction of the rotating frame 13.
  • the second intake unit 310 is between the front side front surface of the housing 300 and the front side front surface of the rotating frame 13 (for example, the first surface 410), and is the lower end of the housing 300. It is arranged at the position of the part.
  • the second exhaust portion 320 is arranged on the outer peripheral portion of the housing 300. However, the second exhaust portion 320 is provided at a position on the second surface 420 side of the housing 300, and is provided at a second end portion which is an end portion substantially opposite to the first end portion in the radial direction. In the examples of FIGS. 2 and 3, the second exhaust portion 320 is between the rear side rear surface of the housing 300 and the rear side rear surface (for example, the second surface 420) of the rotating frame 13, and is the upper end of the housing 300. It is arranged at the position of the part. As described above, when the rotating frame 13 is viewed from the side, the second intake unit 310 and the second exhaust unit 320 are arranged at positions diagonally separated from each other with the rotating frame 13 interposed therebetween.
  • the case where the number of the second intake unit 310 and the number of the second exhaust unit 320 is three respectively is shown, but the number of the second intake unit 310 and the second exhaust unit 320 is not limited to this. It suffices to have one or more second intake units 310 and one or more second exhaust units 320. Further, the number of the second intake units 310 and the number of the second exhaust units 320 may be the same number or different numbers.
  • FIG. 4 is a diagram schematically showing the flow of air inside the gantry device 10 with thick black arrows.
  • FIG. 4 is a view of the air flow inside the gantry device 10 as viewed from the front direction.
  • FIG. 5 is a view of the air flow inside the gantry device 10 viewed from the side in the Y'-Y "cross section of FIG. 2.
  • the control device 15 drives the fan of the second exhaust unit 320.
  • the air sucked from the second intake unit 310 forms an annular space between the front side front surface of the housing 300 and the front side front surface of the rotating frame 13 from the lower side to the upper side of the housing 300. It divides the direction into two and goes up.
  • the air sucked from the second intake unit 310 is on the path of the housing 300 by driving the fan of the first exhaust unit 220 by the control device 15 while ascending the annular space on the front side of the housing 300.
  • the air is sequentially taken into the inside of each device 200 from the first intake unit 210.
  • the air sucked from the first intake unit 210 is, for example, from the first surface 410 (for example, the front surface side surface) to the second surface of each device 200 in parallel with the rotation axis 430 (see FIG. 2). It flows toward the surface 420 (for example, the surface on the rear side) and is exhausted from the first exhaust unit 220.
  • the air exhausted from the first exhaust unit 220 is warm air that absorbs the heat inside the device 200 by heat exchange.
  • the warm air exhausted from the first exhaust portion 220 at the lower part of the housing 300 is on the way of ascending from the lower part to the upper part in the annular space on the rear side of the housing 300, and each first on the path thereof. Together with the warm air exhausted from the exhaust unit 220, the air goes to the second exhaust unit 320 provided at the upper end portion on the rear side of the housing 300. Then, the warm air is exhausted from the second exhaust portion 320 to the outside of the housing 300.
  • the X-ray CT apparatus 1 forcibly flows the air taken in by the second intake unit 310 into the inside of the housing 300 as cooling air by driving the fans of the first exhaust unit 220 and the second exhaust unit 320.
  • the heat-generating device 200 can be cooled.
  • the direction of air flow is unified and consistency is ensured inside the housing 300 and each device 200.
  • the positional relationship between the position of the first intake unit 210 and the position of the first exhaust unit 220 is shared among all the devices 200 that require cooling.
  • the direction of air flow inside all devices 200 that require cooling is unified.
  • the first intake unit 210 is arranged on the front side and the first exhaust unit 220 is arranged on the rear side, so that the inside of all the devices 200 that require cooling is arranged.
  • the direction of flow is unified so that the air flows from the front direction to the rear direction.
  • each device 200 By making the direction of the air flow inside each device 200 parallel to the rotation axis of the rotation frame 13, even if the rotation frame 13 is rotating, it is sucked into each device 200. It is possible to unify the direction of the flow of exhausted air. For example, in all devices 200 that require cooling, even if the rotating frame 13 is rotating, air can always be taken in from the front direction of the device 200 and exhausted from the rear direction. can.
  • the alignment between the direction of the air flowing inside the housing 300 and the direction of the air flowing inside each device 200 is ensured, and as a result, the air flow in the entire gantry device 10 is smooth. It has become.
  • the air that has flowed in from the lower part of the front side of the housing 300 flows into the inside of each housing from the front side of each device 200 while rising in the space on the front side of the housing 300.
  • the air discharged from the rear side of each device 200 (warmed air) is aggregated while rising in the space on the rear side of the housing 300, and finally, the gantry device is collected from the upper part of the rear side of the housing 300. It is exhausted to the outside of 10.
  • the fan control function 52 rotates the fan so that the amount of air exhausted by the fan of the first exhaust unit 220 becomes the optimum amount according to the heat generation amount of each device, for example, from the viewpoint of improving the exhaust heat efficiency and reducing noise. Control the number. Further, the fan control function 52 controls the second exhaust amount by the second exhaust unit 320 according to the first exhaust amount by the first exhaust unit 220.
  • the relationship between the first displacement and the second displacement will be described.
  • FIG. 6 is a schematic diagram for explaining the air flow and temperature when the first displacement is larger than the second displacement.
  • FIG. 7 is a diagram for explaining the flow of air in the housing 300 when the first displacement is larger than the second displacement.
  • the device 200 fixed to the rotating frame 13 housed in the housing 300 is shown in a simplified manner.
  • the first displacement (the amount of intake air from the first intake unit 210) by the first exhaust unit 220 is Vr
  • the second displacement amount from the second intake unit 310) by the second exhaust unit 320.
  • the intake air amount) is V g
  • the outside air temperature is To
  • the front side temperature of the housing 300 is T f
  • the rear side temperature is T b
  • the total exhaust heat amount of the device 200 is Q
  • the internal temperature of the device 200 is Q. Let it be Tr.
  • the internal temperature T of the device 200 is T.
  • FIG. 8 is a schematic diagram for explaining the air flow and temperature when the second displacement is larger than the first displacement.
  • FIG. 9 is a diagram for explaining the flow of air in the housing 300 when the second displacement is larger than the first displacement.
  • the internal temperature T of the device 200 is T.
  • Tr To + Q / ( ⁇ ⁇ C p ⁇ V r ) ⁇ ⁇ ⁇ (5)
  • FIG. 10 is a diagram showing an example of the configuration of the fan control function 52 of the first embodiment.
  • the fan control function 52 includes, for example, an acquisition function 52-1 and a rotation control function 52-2.
  • the acquisition function 52-1 acquires information regarding the operation mode of the X-ray CT apparatus 1 received by the input interface 43. Further, the acquisition function 52-1 may acquire information regarding the operation mode from the control device 15 or the system control function 51. Further, the acquisition function 52-1 may acquire information on the control parameters received by the input interface 43.
  • the rotation control function 52-2 specifies, for example, the rotation speed of the rotation frame 13 based on the operation mode acquired by the acquisition function 52-1 and causes the control device 15 to control the rotation frame 13. Further, the rotation control function 52-2 refers to the fan rotation speed control table 41-1 stored in the memory 41 when rotating the respective fans of the first exhaust unit 220 and the second exhaust unit 320, with reference to the fan rotation speed control table 41-1. The rotation speeds of the respective fans of the first exhaust unit 220 and the second exhaust unit 320 are acquired.
  • FIG. 11 is a diagram for explaining the contents of the fan rotation speed control table 41-1.
  • the fan rotation speed control table 41-1 is, for example, information in which the first exhaust unit side fan rotation speed and the second exhaust unit side fan rotation speed are associated with each mode type.
  • the mode type is, for example, identification information for identifying an operation mode.
  • the fan rotation speed on the first exhaust unit side is, for example, at a predetermined time associated with each mode type of one or more fans (for example, fan RA, fan RB, ...) Provided in the first exhaust unit 220. The number of revolutions is included.
  • the fan rotation speed on the second exhaust unit side is, for example, at a predetermined time associated with each mode type of one or more fans (for example, fan GA, fan GB, ...) Provided in the second exhaust unit 320.
  • the number of revolutions is included.
  • the fan rotation speed control table 41-1 may be provided with a different table for each model of the X-ray CT apparatus 1, for example.
  • the first exhaust unit side fan rotation speed and the second exhaust unit side fan rotation speed are the first displacement amount by the first exhaust unit 220 and the second exhaust amount when the X-ray CT device 1 is driven according to the operation mode.
  • the rotation speed is predetermined so that the difference between the second displacement and the exhaust unit 320 is within a predetermined amount (more preferably, the first displacement and the second displacement are equal to each other).
  • This rotation speed may be determined, for example, based on the simulation result for each operation mode, or may be determined based on the execution result before the actual operation or the statistical result based on the past execution history.
  • the control of the air flow in the housing 300 is intended to adjust the temperature of the device 200 by absorbing the heat inside the device 200 into the air and exhausting the heat. Therefore, the total displacement (first displacement) by the first exhaust unit 220 is adjusted in advance depending on the amount of heat generated by driving the device 200. Therefore, the rotation speed of the fan on the second exhaust unit side of the fan rotation speed control table 41-1 is set so that the second exhaust amount approaches the first exhaust amount.
  • the rotation control function 52-2 refers to the operation mode included in the fan rotation speed control table 41-1 stored in the memory 41 based on the operation mode acquired by the acquisition function 52-1, and matches the operation mode.
  • the control device 15 has a fan so that the fans of the first exhaust unit 220 and the second exhaust unit 320 rotate based on the rotation speed of the first exhaust unit side fan and the rotation speed of the second exhaust unit side fan according to the above. To control the drive of.
  • FIG. 12 is a flowchart showing an example of the flow of processing executed by the X-ray CT apparatus 1 according to the first embodiment.
  • the acquisition function 52-1 acquires the operation mode accepted by the input interface 43 (step S100).
  • the rotation control function 52-2 refers to the fan rotation speed control table 41-1 and determines the rotation speed of the first exhaust unit side fan associated with the operation mode acquired by the acquisition function 52-1.
  • the rotation speed of the fan on the second exhaust unit side is acquired (step S110).
  • step S120 the rotation control function 52-2 rotates the fan of the first exhaust unit 220 and the fan of the second exhaust unit at the acquired rotation speed by the control device 15 (step S120).
  • the system control function 51 causes the control device 15 to execute a scan or the like based on the operation mode (step S130).
  • the scan process in step S130 may include preprocessing by the preprocessing function 53, reconstruction processing by the reconstruction processing function 54, image processing by the image processing function 55, and the like.
  • a control unit (fan control function 52) that controls the drive of the unit 220 and one or more second exhaust units 320 is provided, and the control unit is one or more with the total exhaust amount of air by one or more first exhaust units 220.
  • Rotation of the X-ray CT device 1 by controlling the drive of one or more first exhaust units 220 and one or more second exhaust units 320 so as to approach the total exhaust amount of air by the second exhaust unit 320 of the above.
  • the heat exhaust efficiency of each device provided on the frame can be improved.
  • the temperature inside the device can be kept at a low temperature (predetermined temperature or less) and constant according to the operation mode, so that deterioration of the image quality of the medical image due to the temperature change is suppressed. be able to.
  • the rotation of the fan is controlled so that the first displacement amount by the first exhaust unit 220 and the second exhaust amount by the second exhaust unit 320 come close to each other, so that an extra fan is added. Rotation can be suppressed, and as a result, noise due to extra rotation of the fan can be further reduced.
  • the first exhaust amount and the second exhaust amount are controlled so as to be close to each other, it is possible to suppress the backflow of the exhaust heat air in the housing 300 and the housing. It is possible to suppress the flow of air that does not contribute to the exhaust heat in the 300.
  • the X-ray CT apparatus 1 according to the second embodiment will be described.
  • a measuring unit for measuring the exhaust amount is provided in each of the first exhaust unit 220 and the second exhaust unit 320, and the first measuring unit measures the exhaust gas.
  • the rotation speeds of the fan of the first exhaust unit 220 and the fan of the second exhaust unit 320 are controlled so that the exhaust amount and the second exhaust amount come close to each other.
  • the X-ray CT apparatus 1 according to the second embodiment will be described.
  • the X-ray CT apparatus 1 according to the second embodiment has different configurations of the device 200, the housing 300, and the fan control function 52 among the components of the X-ray CT apparatus 1 according to the first embodiment. Therefore, in the following, among the X-ray CT apparatus 1 according to the second embodiment, the above-mentioned components will be referred to as a device 200A, a housing 300A, and a fan control function 52A, respectively, and mainly regarding differences from the first embodiment. explain.
  • the X-ray CT apparatus 1 according to the second embodiment has a configuration in which the fan rotation speed control table 41-1 is not stored in the memory 41.
  • FIG. 13 is a diagram for explaining the inside of the housing 300A in the second embodiment.
  • FIG. 13 is a cross-sectional view of the XY plane when the gantry device 10 is viewed from the front direction (Z-axis direction).
  • the air flow inside the gantry device 10 is also shown.
  • the device 200A further includes a temperature sensor 500 and a first flow sensor 510 in addition to the configuration of the device 200 of the first embodiment.
  • the housing 300A includes a second flow sensor 520 in addition to the configuration of the housing 300 of the first embodiment.
  • the temperature sensor 500 is an example of a “temperature measuring unit”.
  • the first flow sensor 510 is an example of the "first displacement measuring unit”.
  • the second flow sensor 520 is an example of the "second displacement measuring unit”.
  • the temperature sensor 500 is installed for each device 200 and measures the temperature inside or around each device. Further, the temperature sensor 500 may measure, for example, the temperature of the air flowing inside the device 200. The temperature sensor 500 outputs information indicating the measured temperature to the fan control function 52A.
  • the installation position and number of the temperature sensors 500 are not limited to the example of FIG.
  • the first flow sensor 510 is installed near, for example, the air discharge side by the fan of the first exhaust unit 220, and the amount of air discharged from the device 200 by the fan of the first exhaust unit 220 (displacement amount) at a predetermined time. ), And the measured displacement is output to the fan control function 52A.
  • the second flow sensor 520 is installed near, for example, the air discharge side by the fan of the second exhaust unit 320, and the amount of air discharged from the inside of the housing 300 by the fan of the second exhaust unit 320 at a predetermined time (displacement amount). ), And the measured displacement is output to the fan control function 52A.
  • the installation position and number of the first flow sensor 510 and the second flow sensor 520 are not limited to the example of FIG.
  • FIG. 14 is a diagram showing an example of the configuration of the fan control function 52A in the second embodiment.
  • the fan control function 52 includes, for example, an acquisition function 52A-1, a rotation control function 52A-2, and a control function 52A-3.
  • the acquisition function 52A-1 acquires, for example, information on an operation mode and control parameters from the input interface 43. Further, the acquisition function 52A-1 has the temperature of each device 200 measured by the temperature sensor 500, the displacement of each fan measured by the first flow sensor 510, and each fan measured by the second flow sensor 520. To get the displacement of. Further, the acquisition function 52A-1 acquires the total displacement (first displacement) by totaling the displacements of each fan of the first exhaust unit 220 measured by the first flow sensor 510, and the second flow sensor.
  • the total displacement is obtained by totaling the displacements of each fan of the second exhaust unit 320 measured by 520. Further, the acquisition function 52A-1 may estimate the first displacement from the displacement of the fan of the first exhaust unit 220 measured by some of the first flow sensors 510, and the acquisition function 52A-1 may estimate the first displacement from some of the second flow sensors. The second displacement may be estimated from the displacement of the fan of the second exhaust portion 320 measured by 520.
  • the rotation control function 52A-2 has the rotation speed of the fan of the first exhaust unit 220 and the second exhaust unit 320 so that the first exhaust amount acquired by the acquisition function 52A-1 and the second exhaust amount come close to each other. It controls the rotation speed of the fan.
  • the control function 52A-3 is the first so that the internal temperature of each device 200 becomes a low temperature (predetermined temperature or less) based on the information indicating the internal temperature of the device 200 acquired by the acquisition function 52A-1. Adjust the displacement of the fan of the exhaust unit 220. For example, when the temperature inside the device 200 is higher than the predetermined temperature, the control function 52A-3 of the first exhaust unit 220 increases the exhaust amount of the first exhaust unit 220 installed in the corresponding device 200. Increase the fan speed. As a result, cooling air can be circulated in the device 200 in a short time, the heat exhaust efficiency can be improved, and the temperature inside the device 200 can be lowered to a predetermined temperature or lower.
  • control function 52A-3 controls the rotation speed of the fan so as to reduce the displacement of the fan of the first exhaust unit 220 from the current displacement when the temperature inside the device is equal to or lower than the predetermined temperature. You may. As a result, the temperature of the device 200 can be maintained within a predetermined temperature range and can be continued.
  • the rotation control function 52A-2 has a fan rotation speed (second) of the second exhaust unit 320 so as to approach the first displacement of the first exhaust unit 220 for temperature adjustment controlled by the control function 52A-3. Displacement) is controlled. Therefore, according to the second embodiment, the first displacement can be controlled more appropriately based on the temperature of the device 200, and the second displacement is controlled according to the first displacement. It is possible to improve the heat exhaust effect and realize more appropriate temperature control.
  • FIG. 15 is a flowchart showing an example of the flow of processing executed by the X-ray CT apparatus 1 according to the second embodiment.
  • the processes for controlling the rotation speeds of the fans of the first exhaust unit 220 and the second exhaust unit 320 will be mainly described. Further, in the following, it is assumed that the X-ray CT device 1 is operating based on the operation mode accepted by the input interface 43. Further, the process shown in FIG. 15 is repeatedly executed until the process based on the operation mode (for example, the scan process) is completed.
  • the operation mode for example, the scan process
  • the acquisition function 52A-1 acquires the first displacement based on the displacement measured by the first flow sensor 510 (step S200). Next, the acquisition function 52A-1 acquires the second displacement amount based on the exhaust amount measured by the second flow sensor 520 (step S210). Next, the acquisition function 52A-1 acquires the temperature of the device 200 measured by the temperature sensor 500 (step S220).
  • control function 52A-3 controls the rotation speed of the fan of the first exhaust unit 220 so that the temperature acquired by the acquisition function 52A-1 becomes a predetermined temperature or less (step S230).
  • the rotation control function 52A-2 controls the rotation speed of the fan of the second exhaust unit 320 so that the second exhaust amount approaches the first exhaust amount (step S240).
  • the same effect as that of the first embodiment is obtained, and the heat generation amount of the device 200 and the flow rate (exhaust amount) of the fan change depending on the environment around the device and the degree of deterioration of the device 200. Even in this case, the temperature of the device 200 can be adjusted and the exhaust gas can be controlled more appropriately.
  • the first exhaust amount is the first. 2
  • the rotation speed of the fan of the first exhaust unit 220 may be controlled so as to approach the displacement.
  • the rotation speed of the fan of the first exhaust unit 220 and the rotation speed of the fan of the second exhaust unit 320 are set so that the first exhaust amount and the second exhaust amount come close to each other. Both may be controlled.
  • the fan control functions 52 and 52A have, for example, the rotation speed of the fan of the first exhaust unit 220 and the fan of the second exhaust unit 320 so that the first displacement and the second displacement become predetermined displacements. By controlling both of the rotation speeds of, the first displacement and the second displacement can be brought close to each other.
  • the first intake section 210 and the second intake section The 310 may be equipped with an intake fan.
  • the fan control functions 52 and 52A control the rotation speeds of the fans of the first intake unit 210 and the second intake unit 310, and the first displacement and the second exhaust unit 320 by the first exhaust unit 220.
  • the rotation speed of each fan is controlled so as to approach the second displacement according to the above.
  • the fan control functions 52 and 52A are based on the intake amount by the first intake unit 210 and the second intake unit 310 instead of the first displacement amount by the first exhaust unit 220 and the second exhaust amount by the second exhaust unit 320.
  • the rotation speed of each fan may be controlled so as to be close to the intake air amount.
  • the fan control functions 52 and 52A make the intake amount and the exhaust amount due to the rotation of each fan close to each other. Controls the rotation speed of the fan.
  • any of the embodiments described above can be expressed as follows.
  • the housing that houses the rotating frame and One or more first exhaust units that exhaust the air in the rotating frame, One or more second exhaust sections that exhaust the air in the housing, Storage for storing programs and
  • the processor By executing the program, the processor The one or more first exhaust units and the one or more second exhaust units so that the total displacement of air by the one or more first exhaust units and the total exhaust amount of air by the one or more second exhaust units are close to each other. Control the drive of the exhaust part, An X-ray CT apparatus configured as such.
  • the X-ray CT apparatus 1 according to the third embodiment is, for example, a modification of the first embodiment. In the third embodiment, the differences from the first embodiment will be mainly described.
  • the second exhaust unit 320 including the fan is provided on the outer peripheral portion of the housing 300 that houses the rotating frame 13. Therefore, in the X-ray CT apparatus 1 according to the first embodiment, noise is generated by the fan of the second exhaust unit 320 when the air is discharged. Therefore, in the X-ray CT apparatus 1 according to the third embodiment, the air flow can be unified in one direction from the intake side to the exhaust side, and the noise caused by the fan can be reduced as follows. It is configured as follows.
  • FIG. 16 is a cross-sectional view of a YZ plane when the gantry device 10 is viewed from the side (X-axis direction) in the X-ray CT device 1 according to the third embodiment.
  • an exhaust port 600 for exhausting the air in the rotating frame 13 is provided at the upper end of the outer peripheral portion of the housing 300. .. That is, in the X-ray CT apparatus 1 according to the third embodiment, an exhaust port 600 is provided at the upper end of the outer peripheral portion of the housing 300 in place of the second exhaust portion 320 in the first embodiment.
  • the housing 300 is an example of a "cover”. Further, the rotating frame 13 is an example of a "rotating portion".
  • the X-ray CT apparatus 1 further includes a guide mechanism 610.
  • the guide mechanism 610 is provided in the housing 300, and the air is led out to the exhaust port 600 in the housing 300.
  • the guide mechanism 610 has partition plates 611 and 612 for suppressing the inflow of air to the side where air is taken in in the housing 300.
  • the partition plate 611 is provided on the housing 300 and the rotating frame 13, and is provided on the rear side of the housing 300 and the rotating frame 13.
  • a partition plate 612 is provided on the fixed frame 14.
  • FIG. 16 on the rear side (second surface 420 side) of the housing of each device 200 provided on the rotating frame 13, a partition plate 611 is provided on the housing 300 and the rotating frame 13.
  • a partition plate 612 is provided on the housing 300 and the fixed frame 14.
  • air is led out to the exhaust port 600 in the housing 300 by the guide mechanism 610 having the partition plates 611 and 612, and the housing of each device 200 is used. It suppresses the inflow of air to the side on which the first intake unit 210 and the second intake unit 310, which are the front side (first surface 410 side), are arranged.
  • the partition plate 611 is provided on the housing 300 and the rotating frame 13, when the partition plate 611 is in contact with the rotating rotating frame 13, the partition plate 611 may be made of a material having a small sliding noise. preferable.
  • FIG. 17 is a cross-sectional view of a YZ plane when the gantry device 10 is viewed from the side (X-axis direction) in the X-ray CT device 1 according to the first modification of the third embodiment.
  • the exhaust port 600 is provided not only at the upper end portion of the outer peripheral portion of the housing 300 but also at the lower end portion of the outer peripheral portion of the housing 300. You may.
  • the guide mechanism 610 provided on the upper side and the lower side of the outer peripheral portion of the housing 300 causes air to be led out to the exhaust port 600 in the housing 300 and at the same time. It suppresses the inflow of air to the side where the first intake unit 210 and the second intake unit 310, which are the front side (first surface 410 side) of the housing of each device 200, are arranged.
  • FIG. 18 is a cross-sectional view of a YZ plane when the gantry device 10 is viewed from the side (X-axis direction) in the X-ray CT device 1 according to the second modification of the third embodiment.
  • the fan of the first exhaust unit 220 exhausts the air in the rotating frame 13 to the outer peripheral side of the housing 300
  • two partition plates 611 are provided on the housing 300 and the rotating frame 13. It will be provided.
  • a partition plate 611 is provided on the frame 13.
  • the guide mechanism 610 provided on the upper side and the lower side of the outer peripheral portion of the housing 300 causes air to be led out to the exhaust port 600 in the housing 300 and at the same time. It suppresses the inflow of air to the side where the first intake unit 210 and the second intake unit 310, which are the front side (first surface 410 side) of the housing of each device 200, are arranged. In a state where the partition plate 611 is in contact with the rotating rotating frame 13, it is preferable to use a material having a small sliding noise for the partition plate 611.
  • the guide mechanism 610 having the partition plates 611 and 612 causes air to be led out to the exhaust port 600 in the housing 300, and also in the housing 300. It is possible to suppress the inflow of air to the side where air is taken in. Therefore, in the X-ray CT apparatus 1 according to the third embodiment, the heat exhaust efficiency of each device 200 provided on the rotating frame 13 can be improved.
  • the fan is not provided on the outer peripheral portion of the housing 300, the noise caused by the fan can be reduced. Further, in the X-ray CT apparatus 1 according to the third embodiment, since the parts requiring maintenance are reduced by not providing the fan on the outer peripheral portion of the housing 300, the inspection efficiency of the parts can be improved.
  • the X-ray CT apparatus 1 according to the fourth embodiment is, for example, a modification of the third embodiment.
  • the noise caused by the fan is reduced by not providing the fan.
  • the air flow can be unified in one direction from the intake side to the exhaust side, and the noise caused by the fan can be reduced as follows. It is composed.
  • FIG. 19 is a schematic perspective view showing the internal structure of the X-ray CT apparatus 1 according to the fourth embodiment.
  • FIG. 19 shows only a part of the structure of the gantry device 10.
  • the rotating frame 13 of the X-ray CT apparatus 1 is provided with various devices 200 such as an X-ray generator 20 and an X-ray detector 25 orbiting inside in the circumferential direction.
  • the rotating frame 13 is formed with a ventilation portion 1041 through which air can flow.
  • the rear side of the rotating frame 13 in the depth direction is the exhaust side of the ventilation portion 1041, and the outer peripheral side of the rotating frame 13 in the circumferential direction is the ventilation portion 1041. It will be on the intake side.
  • the rotating frame 13 is an example of a "rotating portion”.
  • the X-ray CT apparatus 1 further includes a guide portion 1005 provided on the exhaust side of the ventilation portion 1041 of the rotary frame 13, that is, on the rear side in the depth direction of the rotary frame 13, and the guide portion 1005 is attached to the rotary frame 13. It communicates and guides the direction of the air discharged from the exhaust side of the rotating frame 13, and discharges the air and the heat flowing with the air to the outside of the X-ray CT apparatus 1 through the exhaust port described later. Further, the guide unit 1005 causes air to be led out in a predetermined direction L (for example, from the upper side of the X-ray CT apparatus 1) in order to better reduce noise.
  • the predetermined direction L is a direction in which the subject P placed on the X-ray CT apparatus 1 is less likely to feel noise.
  • the warm air discharged from the ventilation unit 1041 can be guided, and heat can be dissipated with higher discharge efficiency.
  • the warm air By deriving the warm air along the predetermined direction L, the warm air can be discharged to the outside of the X-ray CT apparatus 1 with lower noise.
  • a middle frame 1021 formed in a substantially ring shape is provided on the rear side of the gantry device 10, the middle frame 1021 is located behind the rotating frame 13 and the guide portion 1005, and the middle frame 1021 is a guide. It supports the portion 1005 and rotatably supports the rotating frame 13.
  • FIG. 20 is a cross-sectional view of the X-ray CT apparatus 1 according to the fourth embodiment as viewed from the side.
  • FIG. 20 the remaining part of the gantry device 10 is omitted, and only the middle frame 1021 is shown. Further, in FIG. 20, the structure of some parts is simplified or omitted.
  • FIG. 21 is a perspective view showing the rotating frame 13 of the X-ray CT apparatus 1 according to the fourth embodiment, and FIG. 21 is a view seen from the rear side of the rotating frame 13.
  • the rotating frame 13 has a base portion 1042 formed in a ring shape, and a flange protruding forward by a certain distance is formed on the outer periphery of the base portion 1042.
  • the flange is formed so as to extend over the entire circumference of the outer circumference of the base portion 1042.
  • the X-ray generator 20 and the X-ray detector 25 face each other, are fixed to the end face facing the front side of the base portion 1042, and are surrounded by the flange of the rotating frame 13.
  • the ventilation portion 1041 of the rotating frame 13 is composed of a plurality of intake ports 1043, a plurality of ventilation ports 1044, and a plurality of impeller portions 1045.
  • a plurality of intake ports 1043 that are separated from each other by a certain distance are formed (that is, formed on a flange).
  • the plurality of intake ports 1043 are formed as rectangular holes, but may have a circular hole, a grid shape, or the like.
  • a plurality of vents 1044 are formed on the rear side of the rotating frame 13, that is, on the side facing the guide portion 1005 and the middle frame 1021 of the gantry device 10.
  • the plurality of vents 1044 are formed in the base portion 1042 so as to be separated from each other by a certain distance.
  • the plurality of vents 1044 are formed as rectangular holes, but may have a circular hole, a grid shape, or the like.
  • the plurality of impeller portions 1045 are arranged in the plurality of vents 1044, respectively, and specifically, are provided on the side of the base portion 1042 toward the middle frame 1021 of the gantry device 10.
  • the impeller portion 1045 provided in the corresponding vent 1044 leads air out of the vent 1044.
  • Each impeller portion 1045 is formed so as to be inclined to the rear side, and when the rotating frame 13 rotates in the rotation direction T, the impeller portion 1045 is inclined so as to allow air to flow toward the rear side (that is, the guide portion 1005).
  • the edges of the plurality of impellers 1045 near the center of the rotating frame 13 have a circular inner diameter.
  • the impeller portion 1045 rotates with the rotation of the rotating frame 13, and each impeller portion 1045 moves air along the rotation direction T to generate a swirling airflow, and the air flows through the guide portion 1005 on the rear side. ..
  • a negative pressure is formed in the vent 1044, and cold air flows in from the outer side in the circumferential direction of the rotating frame 13 through the intake port 1043, and each of the rotating frames 13 By removing the heat generated by the parts, it becomes warm air.
  • the warm air is discharged to the guide portion 1005 through the vent 1044 and guided by the guide portion 1005.
  • the ventilation portion 1041 of the rotating frame 13 keeps the air circulating due to the kinetic energy during rotation of the rotating frame 13, and the device 200 such as the X-ray generator 20 installed on the base portion 1042 of the rotating frame 13. Heat is released to the outside.
  • the number of intake ports 1043 is not particularly limited, but it is sufficient that the requirement that a sufficient amount of air flows in when the rotating frame 13 is rotated is satisfied.
  • the number of vents 1044 is not particularly limited, but it is sufficient that the requirement for timely discharge of warm air during rotation of the rotating frame 13 is satisfied.
  • the plurality of vents 1044 may be formed with different dimensions. For example, when the component in the vent is a component that generates a large amount of heat (for example, an X-ray generator 20), the heat is generated by increasing the size of the vent and increasing the amount of air passing through the vent. It is rapidly deprived by a large amount of air.
  • the size of the vent can be reduced to avoid unnecessary wind resistance due to the rotating frame 13.
  • the plurality of impeller portions 1045 may be provided on the rotating frame 13 so as to be integrally formed with the base portion 1042 of the rotating frame 13, and each impeller portion 1045 is a connecting component such as a bolt as a separate component. May be fixed to the rotating frame 13.
  • the impeller portion 1045 is provided on the back surface side of the rotating frame 13, and the rotation of the rotating frame 13 causes a pressure difference to promote the air flow.
  • the kinetic energy during rotation of the frame 13 can be efficiently utilized.
  • the fan structure is eliminated, so that the noise caused by the fan can be reduced.
  • the guide portion 1005 has a guide cover 1051.
  • FIG. 22 is a schematic perspective view showing the guide cover 1051 of the X-ray CT apparatus 1 according to the fourth embodiment, and is a view seen from the front side of the guide cover 1051.
  • the guide cover 1051 is an example of a "cover”.
  • the guide cover 1051 is formed in a ring shape, and a flange is formed on the outer periphery of the guide cover 1051 so as to project forward by a certain distance, and the inner circumference of the guide cover 1051 also protrudes forward by a certain distance.
  • a flange is formed.
  • the two flanges are formed so as to extend over the entire circumference of the guide cover 1051 in the circumferential direction.
  • a groove 1052 for accommodating (accommodating) the impeller portion 1045 of the rotating frame 13 is formed on the front side of the guide cover 1051 while receiving the air flowing from the rotating frame 13.
  • the groove 1052 is an example of a "containment portion".
  • An exhaust port 1053 for leading air out in a predetermined direction L is formed on the upper side of the guide cover 1051. Specifically, the exhaust port 1053 is formed on the outer peripheral side flange of the guide cover 1051 and is formed so as to discharge air in a predetermined direction L (upward).
  • the guide cover 1051 is fixed to the middle frame 1021 of the gantry device 10, for example, by welding the end face toward the rear side of the guide cover 1051 to the end face toward the front side of the middle frame 1021. ing. However, it is not limited to this, and may be fixed by bolts, rivets, welds, or engagements, for example.
  • the guide cover 1051 is arranged so that the groove 1052 faces the rotating frame 13, the guide cover 1051 is arranged so as to be attached to the rotating frame 13 in the depth direction, and the groove 1052 is an impeller portion 1045 of the rotating frame 13. Functions as a part for storing (accommodating).
  • the ring-shaped sealed space surrounded by the ring-shaped guide cover 1051 with the groove 1052 and the rotating frame 13 constitutes the guide portion 1005.
  • the guide portion 1005 is formed by the guide cover 1051 and the rotating frame 13, and by guiding air in a predetermined direction L, the warm air discharged from the ventilation port 1044 of the rotating frame 13 is directly and irregularly rearward. Prevents large areas from flowing. Due to the shape of the guide portion 1005 described later, the warm air flows to the exhaust port 1053 along the ring-shaped space formed by the groove 1052 of the guide cover 1051 and is discharged to the outside along the predetermined direction L. The air discharged from the vent 1044 of the rotating frame 13 becomes hot and tends to rise. Therefore, by forming the exhaust port 1053 above the guide cover 1051, the warm air is intensively discharged from above, so that the discharge efficiency of the warm air is improved. Further, since the exhaust port 1053 is arranged above, the noise at the time of discharging the air is less likely to diffuse downward, and the noise caused by the fan can be further reduced.
  • the guide cover 1051 is shown in FIG. 20 in order to efficiently discharge the warm air discharged from the ventilation port 1044 of the rotating frame 13 in a predetermined direction L.
  • the end surface of the guide cover 1051 toward the rotating frame 13 is parallel to a plane (XY plane consisting of the X axis and the Y axis) orthogonal to the rotation center of the rotating frame 13, and is a guide when viewed from the lateral direction.
  • the upper depth dimension S1001 of the cover 1051 is larger than the lower depth dimension S1002, and the guide cover 1051 has an end face (or XY plane) whose end face toward the middle frame 1021 of the gantry device 10 faces the rotating frame 13. Inclines in the depth direction with respect to. Since the groove 1052 is formed in a shape in which the lower space is small and the upper space is wide, the warm air discharged from the vent 1044 is guided upward as much as possible through the shape of the groove 1052 of the guide cover 1051. And flow upwards faster.
  • the shape of the guide portion 1005 described above is an example of the "guide mechanism". That is, the guide portion 1005 located on the exhaust side of the rotating frame 13 can lead air to the exhaust port 1053 in the guide cover 1051 due to the above-mentioned shape.
  • a protective pad 1054 is provided at the exhaust port 1053 of the guide cover 1051 in order to prevent the ventilation efficiency from being lowered due to the entry of foreign matter or water vapor into the guide cover 1051. It is provided.
  • the protective pad 1054 may be made of a breathable water absorbent material.
  • the exhaust port 1053 may be composed of a plurality of circular holes to prevent foreign matter or the like from entering the inside of the guide cover 1051 from the exhaust port 1053. Further, the exhaust port 1053 may have another shape such as a rectangular shape or a grid shape.
  • the heat generated by the device 200 is continuously released to the guide unit 1005 by the kinetic energy when the rotating frame 13 of the X-ray CT apparatus rotates, and the warm air is continuously released to the guide unit 1005 by the guide unit 1005. It is led out to the outside of the X-ray CT apparatus along a predetermined direction L.
  • the kinetic energy of the rotation of the rotating frame 13 can be efficiently utilized, and the noise generated when the rotating frame 13 dissipates heat can be reduced.
  • FIG. 23A and 23B are schematic views showing the internal configuration of the X-ray CT device 1 according to the first modification of the fourth embodiment, and are schematic views of the X-ray CT device 1 viewed from the side.
  • FIG. 23A is a schematic view when the inner diameter dimension S1003 of the guide cover 1051 is larger than the outer diameter dimension S1004 of the middle frame 1021
  • FIG. 23B is a schematic view in which the inner diameter dimension S1003 of the guide cover 1051 is the outer diameter dimension S1004 of the middle frame 1021. It is a schematic diagram when it is smaller than.
  • the gantry device 10 when the dimension a in the depth direction of the rotating frame 13 is formed large in order to mount the larger device 200, the gantry device 10 is used to secure the overall dimension b of the gantry device 10. It is necessary to change the configuration of the middle frame 1021. That is, by changing the structure of the middle frame 1021, it is not necessary to change the overall dimension b of the gantry device 10 from the front side of the rotating frame 13 to the rear side of the middle frame 1021.
  • the middle frame 1021 if the middle frame 1021 has sufficient structural strength, it can be miniaturized.
  • the middle frame 1021 is formed so that its outer diameter dimension S1004 is smaller than the inner diameter dimension S1003 of the guide cover 1051.
  • the entire middle frame 1021 is arranged on the inner peripheral side of the guide cover 1051 so as to avoid the plurality of impeller portions 1045 and the guide cover 1051.
  • the middle frame 1021 is further close to the rotating frame 13 in the depth direction and is housed on the inner peripheral side of the guide cover 1051 even when the dimension a in the depth direction of the rotating frame 13 becomes large. Therefore, it is not necessary to change the overall dimension b of the gantry device 10.
  • the middle frame 1021 when the middle frame 1021 cannot be miniaturized in order to secure sufficient structural strength, the middle frame 1021 has an opening such as a relief groove in order to avoid the impeller portion 1045. It is formed. Specifically, in FIG. 23B, the inner diameter dimension S1003 of the guide cover 1051 is smaller than the outer diameter dimension S1004 of the middle frame 1021, and in the depth direction of the middle frame 1021, the entire circumference of the middle frame 1021 in the circumferential direction. A relief groove 1055 extending over the surface is formed. The relief groove 1055 accommodates a plurality of impeller portions 1045. The relief groove 1055 is formed so as to be recessed toward the rear side.
  • a guide cover 1051 (or a guide plate) is installed on the end surface of the relief groove 1055 on the side facing the rotation frame 13, and in the present embodiment, the guide cover 1051 is provided from the rotation center of the rotation frame 13 of the plurality of impeller portions 1045.
  • Two ring-shaped guide plates are installed on the outer peripheral side and the inner peripheral side near the rotation center of the rotating frame 13, respectively.
  • One end of each ring-shaped guide plate toward the middle frame 1021 in the depth direction is fixed to the middle frame 1021, and the other end toward the rotating frame 13 in the depth direction is in close contact with the end surface of the rotating frame 13 toward the middle frame 1021. ..
  • the guide portion 1005 has a relief groove 1055 formed on the middle frame 1021, a ring-shaped guide cover 1051 (or a guide plate) fixed to the middle frame 1021, and a ring-shaped rotating frame 13. It is composed of a sealed space.
  • An exhaust port 1053 that guides warm air in a predetermined direction L is formed on the upper side of the guide cover 1051 (or a guide plate) in the vertical direction.
  • the middle frame 1021 is provided with a relief groove 1055 and can be brought close to the rotating frame 13 in the depth direction. There is no need to change the overall dimension b of.
  • FIG. 24 is a schematic view showing the internal configuration of the X-ray CT apparatus 1 according to the second modification of the fourth embodiment, and is a view of the X-ray CT apparatus 1 viewed from the side.
  • the guide cover 1051 is not provided on the guide portion 1005.
  • the two ring-shaped sealing plates 1059 have an outer peripheral side away from the rotation center of the rotation frame 13 of the plurality of impeller portions 1045 and an inner peripheral side close to the rotation center of the rotation frame 13. It is arranged in each.
  • the end faces of the two sealing plates 1059 on the side toward the inner frame 1021 in the depth direction are fixed to the end faces of the middle frame 1021 toward the impeller portion 1045 in the depth direction.
  • the end faces of the two sealing plates 1059 on the side toward the rotating frame 13 in the depth direction are in close contact with the end faces of the rotating frame 13 on the side toward the middle frame 1021 in the depth direction, whereby the vent holes 1044 and the middle frame of the rotating frame 13 are brought into close contact with each other.
  • a ring-shaped sealed space for accommodating a plurality of impeller portions 1045 is formed between 1021 and 1021.
  • the guide portion 1005 is composed of a ring-shaped sealing space formed by a middle frame 1021, a ring-shaped sealing plate 1059 fixed on the middle frame 1021, and a rotating frame 13.
  • An exhaust port 1058 for leading warm air in a predetermined direction L is formed on the upper side of the sealing plate 1059 on the outer peripheral side in the vertical direction.
  • the impeller portion 1045 rotates with the rotation of the rotating frame 13, and each impeller portion 1045 moves air to generate a swirling airflow, and the air flows through the guide portion 1005.
  • the air in the vent 1044 flows along the guide portion 1005
  • a negative pressure is formed in the vent 1044, and the cold air flows in from the outer side in the circumferential direction of the rotating frame 13 through the intake port 1043, and the rotating frame 13
  • the warm air is discharged to the guide portion 1005 through the vent 1044 and guided by the guide portion 1005.
  • the warm air is continuously discharged to the guide unit 1005, and by increasing the air pressure in the guide unit 1005, the hot air is discharged from the exhaust port 1058 of the guide unit 1005 in a predetermined direction L. Will be done.
  • the ventilation portion 1041 of the rotating frame 13 keeps the air circulating due to the kinetic energy during rotation of the rotating frame 13, and the device 200 such as the X-ray generator 20 installed on the base portion 1042 of the rotating frame 13. Heat is released to the outside.
  • the number of sealing plates 1059 is not limited.
  • a ring-shaped sealing space may be formed between the middle frame 1021 and the sealing plate 1059 and the rotating frame 13.
  • Two ring-shaped sealing plates may be used, or a plurality of sheet-shaped sealing plates may be joined to form two ring-shaped structures.
  • air can be led out to the exhaust port 1053 by the guide portion 1005 having the shape of the rotating frame 13 and the guide mechanism.
  • the impeller portion 1045 is provided on the back side of the rotating frame 13, and the rotation of the rotating frame 13 causes a pressure difference to promote the air flow.
  • the kinetic energy at the time of rotation of 13 can be efficiently utilized. Therefore, in the X-ray CT apparatus 1 according to the fourth embodiment, the heat exhaust efficiency of each device 200 provided on the rotating frame 13 can be improved.
  • the fan since the fan is not provided, the noise caused by the fan can be reduced. Further, in the X-ray CT apparatus 1 according to the fourth embodiment, since the number of parts requiring maintenance is reduced by not providing the fan, the inspection efficiency of the parts can be improved.
  • each component of each device is a functional concept, and does not necessarily have to be physically configured as shown in the figure. That is, the specific form of distribution / integration of each device is not limited to the one shown in the figure, and all or part of them may be functionally or physically distributed / physically in arbitrary units according to various loads and usage conditions. Can be integrated and configured. Further, each processing function performed by each device may be realized by a CPU and a program analyzed and executed by the CPU, or may be realized as hardware by wired logic.
  • control program prepared in advance on a computer such as a personal computer or a workstation.
  • This control program can be distributed via a network such as the Internet.
  • this control program can also be executed by being recorded on a computer-readable recording medium such as a hard disk, flexible disk (FD), CD-ROM, MO, or DVD, and being read from the recording medium by the computer.
  • a computer-readable recording medium such as a hard disk, flexible disk (FD), CD-ROM, MO, or DVD
  • the heat exhaust efficiency of each device provided in the rotating frame of the X-ray CT apparatus can be improved.
  • it can also be applied to the efficacy evaluation of therapeutic drugs that have already been put on the market, and can be used to optimize the dosage and administration of therapeutic drugs.

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Abstract

Un mode de réalisation de la présente invention concerne un appareil de tomodensitométrie par rayons X (1) qui capture une image d'un sujet d'essai sur un dispositif formant lit (30), et comporte : un cadre rotatif (13) ; un boîtier (300) ; une première unité d'évacuation (220) ; une deuxième unité d'évacuation (320) ; et une unité de commande (52). Un ou plusieurs dispositifs sont fixés au cadre rotatif. Le boîtier accueille le cadre rotatif. Au moins l'une de la première unité d'évacuation évacue l'air à l'intérieur du cadre rotatif. Au moins l'une de la deuxième unité d'évacuation évacue l'air à l'intérieur du boîtier. L'unité de commande commande l'entraînement de ladite première unité d'évacuation et de ladite deuxième unité d'évacuation. L'unité de commande commande également l'entraînement de ladite première unité d'évacuation et de ladite deuxième unité d'évacuation, de sorte que la quantité totale d'air évacué par ladite première unité d'évacuation devient proche de la quantité totale d'air évacué par ladite deuxième unité d'évacuation.
PCT/JP2021/019861 2020-05-26 2021-05-25 Appareil de tomodensitométrie par rayons x, procédé de commande d'appareil de tomodensitométrie par rayons x, et programme WO2021241595A1 (fr)

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Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH10234722A (ja) * 1997-02-27 1998-09-08 Hitachi Medical Corp Ｘ線ｃｔ装置
JP2004237103A (ja) * 2003-02-05 2004-08-26 Siemens Ag コンピュータ断層撮影装置のガントリの冷却システムおよび冷却方法
JP2006181187A (ja) * 2004-12-28 2006-07-13 Hitachi Medical Corp Ｘ線ｃｔ装置
CN100457044C (zh) * 2006-04-28 2009-02-04 上海西门子医疗器械有限公司 Ct设备的风冷散热方法及装置
JP2009219619A (ja) * 2008-03-14 2009-10-01 Toshiba Corp Ｘ線ｃｔ装置
JP2011505187A (ja) * 2007-11-30 2011-02-24 コーニンクレッカ フィリップス エレクトロニクス エヌ ヴィ ガントリー冷却
JP2017051484A (ja) * 2015-09-10 2017-03-16 株式会社東芝 Ｘ線ｃｔ装置
JP2017148157A (ja) * 2016-02-23 2017-08-31 東芝メディカルシステムズ株式会社 医用画像診断装置
JP2019130222A (ja) * 2018-02-02 2019-08-08 キヤノンメディカルシステムズ株式会社 Ｘ線ｃｔ装置及び医用画像診断装置

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH10234722A (ja) * 1997-02-27 1998-09-08 Hitachi Medical Corp Ｘ線ｃｔ装置
JP2004237103A (ja) * 2003-02-05 2004-08-26 Siemens Ag コンピュータ断層撮影装置のガントリの冷却システムおよび冷却方法
JP2006181187A (ja) * 2004-12-28 2006-07-13 Hitachi Medical Corp Ｘ線ｃｔ装置
CN100457044C (zh) * 2006-04-28 2009-02-04 上海西门子医疗器械有限公司 Ct设备的风冷散热方法及装置
JP2011505187A (ja) * 2007-11-30 2011-02-24 コーニンクレッカ フィリップス エレクトロニクス エヌ ヴィ ガントリー冷却
JP2009219619A (ja) * 2008-03-14 2009-10-01 Toshiba Corp Ｘ線ｃｔ装置
JP2017051484A (ja) * 2015-09-10 2017-03-16 株式会社東芝 Ｘ線ｃｔ装置
JP2017148157A (ja) * 2016-02-23 2017-08-31 東芝メディカルシステムズ株式会社 医用画像診断装置
JP2019130222A (ja) * 2018-02-02 2019-08-08 キヤノンメディカルシステムズ株式会社 Ｘ線ｃｔ装置及び医用画像診断装置

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