X-ray ct device, x-ray ct system, and control method

Abstract

The X-ray CT apparatus of this embodiment allows for easy control of the imaging mode settings and device status. It includes a scanner unit, a support unit, a display unit, and a display control unit. The scanner unit has an imaging system. The support unit has a tilting mechanism that tilts the scanner unit about a tilt axis. The display unit displays setting information related to the tilt state of the scanner unit relative to the support unit. The display control unit controls the display method of the setting information based on the tilt state of the scanner unit used in the imaging mode applied to the subject.

Description

Technical Field

[0001] The described embodiments generally relate to X-ray CT apparatus, X-ray CT system, and control methods. Background Technology

[0002] The upright X-ray CT (Computed Tomography) device, which can take pictures of the subject in an upright position, can perform imaging in two positions: standing or sitting, and lying on the examination table, by tilting the scanner head 90 degrees.

[0003] Both standing and sitting X-ray imaging are performed with the scanner section at a 90-degree angle (the scanner section opening is vertical). Therefore, when technicians or other users set the imaging mode, it is sometimes difficult to tell from the appearance of the standing X-ray CT device whether it is set to the standing or sitting imaging mode.

[0004] Existing technical documents Patent documents Patent Document 1: Japanese Patent Application Publication No. 2006-034727 Summary of the Invention

[0005] The technical problem that the invention aims to solve One of the problems to be solved by the embodiments disclosed in this specification and accompanying drawings is the ability to easily control the setting of the shooting mode or the state of the device. However, the problems to be solved by the embodiments disclosed in this specification and accompanying drawings are not limited to the above-mentioned problems. Technical problems corresponding to the effects of the various configurations shown in the embodiments described below can also be identified as other technical problems.

[0006] The X-ray CT apparatus of this embodiment includes a scanner unit, a support unit, a display unit, and a display control unit. The scanner unit has an imaging system. The support unit has a tilting mechanism that tilts the scanner unit about a tilt axis. The display unit displays setting information related to the tilt state of the scanner unit relative to the support unit. The display control unit controls the display method of the setting information based on the tilt state of the scanner unit used in the imaging mode performed on the subject.

[0007] Invention Effects The purpose of this invention is to enable easy control of the shooting mode settings or the state of the device. Attached Figure Description

[0008] Figure 1 This is a diagram showing an example of the configuration of the X-ray CT apparatus according to this embodiment.

[0009] Figure 2This is a conceptual diagram showing the state of the scanner unit in the standing shooting mode of this embodiment.

[0010] Figure 3 This is a conceptual diagram showing the state of the scanner unit in the seated shooting mode of this embodiment.

[0011] Figure 4 This is a conceptual diagram showing the state of the scanner unit in the supine imaging mode of this embodiment.

[0012] Figure 5 This is a flowchart illustrating the first operational example of the X-ray CT apparatus according to this embodiment.

[0013] Figure 6 This is a flowchart illustrating a second operational example of the X-ray CT apparatus according to this embodiment.

[0014] Figure 7A This is an example of a display of settings information in standing shooting mode.

[0015] Figure 7B This is an example of a display of settings information in standing shooting mode.

[0016] Figure 8 This is an example of the display of settings information in seated shooting mode.

[0017] Figure 9 This is an example of the display of settings information in the supine shooting mode.

[0018] Figure 10 This is a diagram showing an example of error information displayed in this embodiment.

[0019] Explanation of reference numerals in the attached figures 1 X-ray CT device 10. Scanner Department 11 X-ray tubes 12 X-ray detectors 13 Rotating Frame 14 X-ray high-voltage device 15. Control device 16. Wedge-shaped objects 17 Collimator 18. Data Acquisition System (DAS) 20 Support Unit 21 Base Plate 30 clinic beds 31 Abutment 32 Support Frame 33 Top Plate 34. Examination Bed Drive Unit 40 Console 41 Memory 42 monitors 43 Input Interface 44 Processing Circuit 60 Display screen 61. Schematic diagram area 62 Scanner Information Area 63. Operation Panel Area 64 arrows 71 wheelchairs Error Message 91 441 System Control Functions 442 Shooting Control Function 443 Scanner control functions 444 Image generation function 445 Obtain Function 446 Object Detection Function 447 Angle Determination Function 448 Display control function OP opening Detailed Implementation

[0020] Hereinafter, embodiments of the X-ray CT apparatus, X-ray CT system, and control method will be described in detail with reference to the accompanying drawings. In the following embodiments, the same reference numerals are used for the same parts, and repeated descriptions are omitted where appropriate. Hereinafter, one embodiment will be described using the accompanying drawings.

[0021] Figure 1 This is a diagram illustrating an example of the configuration of the X-ray CT apparatus 1 according to this embodiment. (See diagram below.) Figure 1 As shown, the X-ray CT apparatus 1 includes a scanner unit 10, an examination table 30, and a control console 40. Additionally, in Figure 1For ease of explanation, multiple scanner units 10 are depicted, but in reality, there may be one or more units. Each scanner unit 10 is a scanning device configured to perform X-ray CT imaging on a subject P. The examination table 30 is a transport device for placing the subject P, which is the object of X-ray CT imaging, and for positioning the subject P. The control console 40 is a computer that controls the scanner unit 10. For example, the scanner unit 10 and the examination table 30 are located in a CT examination room, and the control console 40 is located in a control room adjacent to the CT examination room. The scanner unit 10, the examination table 30, and the control console 40 are connected via wired or wireless means to communicate with each other. Furthermore, the control console 40 may not necessarily be located in a control room. For example, the control console 40 may be located in the same room as the scanner unit 10 and the examination table 30. Alternatively, the control console 40 may be assembled into the scanner unit 10.

[0022] like Figure 1 As shown, the scanner unit 10 includes an X-ray tube 11, an X-ray detector 12, a rotating frame 13, an X-ray high-voltage device 14, a control device 15, a wedge 16, a collimator 17, and a data acquisition system (DAS) 18.

[0023] X-ray tube 11 irradiates the subject P with X-rays. Specifically, X-ray tube 11 includes a cathode that generates thermionic electrons, an anode that receives thermionic electrons flying from the cathode and generates X-rays, and a vacuum tube that holds the cathode and anode together. X-ray tube 11 is connected to X-ray high-voltage device 14 via a high-voltage cable. A tube voltage is applied between the cathode and anode by X-ray high-voltage device 14. With the application of tube voltage, thermionic electrons fly from the cathode toward the anode. Tube current flows through the thermionic electrons flying from the cathode toward the anode. X-rays are generated by the collision of thermionic electrons with the anode.

[0024] X-ray detector 12 detects X-rays that have irradiated the object P from X-ray tube 11 and passed through it, and outputs an electrical signal corresponding to the dose of the detected X-rays to DAS 18. X-ray detector 12 has a configuration in which multiple rows of X-ray detection elements arranged in the channel direction are arranged along the slice direction (row direction). X-ray detector 12 is, for example, an indirect conversion type detector having a grid, a scintillator array, and an optical sensor array. The scintillator array has multiple scintillators. The scintillators output light in an amount corresponding to the incident X-ray dose. The grid has an X-ray shielding plate disposed on the X-ray incident surface side of the scintillator array and absorbs scattered X-rays. Furthermore, the grid is sometimes referred to as a collimator (one-dimensional collimator or two-dimensional collimator). The optical sensor array converts the light dose from the scintillators into an electrical signal. For example, a photodiode is used as the optical sensor.

[0025] In addition, the X-ray detector 12 can also be a photon counting detector.

[0026] In the case of a photon-counting detector, the scintillator converts incident X-rays into a number of photons corresponding to the intensity of the incident X-rays. The optical sensor array has the function of amplifying the light received from the scintillator and converting it into an electrical signal, generating an output signal (energy signal) with a wave height value corresponding to the energy of the incident X-rays.

[0027] Alternatively, the X-ray detector 12 may also be a direct conversion type detector having a semiconductor element that converts incident X-rays into electrical signals.

[0028] The rotating frame 13 is an annular frame that supports the X-ray tube 11 and the X-ray detector 12, enabling them to rotate about a rotation axis (Z-axis). Specifically, the rotating frame 13 supports the X-ray tube 11 and the X-ray detector 12 opposite to each other. In addition to the X-ray tube 11 and the X-ray detector 12, the rotating frame 13 also supports the X-ray high-voltage device 14 and the DAS 18. The rotating frame 13 is rotatably supported on a fixed frame (not shown) about the rotation axis. The rotation mechanism includes, for example, a motor that generates a rotational driving force and a bearing that transmits this rotational driving force to the rotating frame 13, causing it to rotate. The motor is mounted on the fixed frame, and the bearing is physically connected to the rotating frame 13 and the motor. The rotating frame 13 rotates according to the rotational force of the motor. The X-ray tube 11 and the X-ray detector 12 rotate about the rotation axis by rotating the rotating frame 13. The rotating frame 13 is an example of a rotating part.

[0029] The X-ray high-voltage device 14 includes a high-voltage generating device and an X-ray control device. The high-voltage generating device includes circuitry such as a transformer and a rectifier, generating a high voltage applied to the X-ray tube 11 and supplying a wire current to the X-ray tube 11. The X-ray control device controls the output voltage corresponding to the X-rays irradiated by the X-ray tube 11. The high-voltage generating device can be either a transformer or an inverter. The X-ray high-voltage device 14 can be installed in a rotating frame 13 within the scanner unit 10, or in a fixed frame (not shown) within the scanner unit 10.

[0030] The wedge 16 adjusts the dose of X-rays irradiating the subject P. Specifically, the wedge 16 attenuates the X-rays in a way that makes the dose of X-rays irradiating the subject P from the X-ray tube 11 a predetermined distribution. For example, the wedge 16 can be a metal plate such as aluminum, such as a wedge filter or a butterfly filter.

[0031] Collimator 17 defines the irradiation range of X-rays transmitted through wedge 16. Collimator 17 supports multiple lead plates that block X-rays, allowing them to slide and adjust the shape of the slit formed by the multiple lead plates. Collimator 17 is also sometimes referred to as an X-ray aperture.

[0032] The DAS18 reads an electrical signal corresponding to the dose of X-rays detected by the X-ray detector 12. The DAS18 amplifies the read electrical signal and integrates it over the entire viewing period, thereby collecting detection data with digital values ​​corresponding to the dose of X-rays over that viewing period. This detection data is also referred to as projection data. The DAS18 is implemented, for example, by using an application-specific integrated circuit (ASIC) equipped with circuit elements capable of generating projection data. The projection data is transmitted to the control console 40 via a contactless data transmission device or the like.

[0033] Non-contact or contact communication circuits are provided on both the rotating frame 13 and the fixed frame, respectively, for communication between the unit supported on the rotating frame 13 and external devices on the fixed frame or the scanner unit 10. For example, when optical communication is used as the non-contact communication method, the detection data generated by the DAS 18 is transmitted from a transmitter with a light-emitting diode (LED) provided on the rotating frame 13 to a receiver with a photodiode provided on the fixed frame of the scanner unit 10 via optical communication, and then transmitted from the fixed frame to the control console 40 via the transmitter. In addition, as a communication method, besides non-contact data transmission such as capacitive coupling and radio wave transmission, a contact-type data transmission method using slip rings and electrode brushes can also be used.

[0034] The control device 15 controls the X-ray high-voltage device 14 and DAS 18 to perform X-ray CT imaging according to the imaging control function 442 of the processing circuit 44 of the console 40. The control device 15 includes a processing circuit with a Central Processing Unit (CPU) or Micro Processing Unit (MPU) and drive mechanisms such as motors and actuators. As hardware resources, the processing circuit includes a processor such as a CPU and memories such as Read Only Memory (ROM) and Random Access Memory (RAM). The control device 15 performs various functions by executing programs expanded in the memories. Furthermore, these functions are not limited to being implemented by a single processing circuit. Multiple independent processors can be combined to form a processing circuit, with each processor executing programs to achieve its respective function. Additionally, the control device 15 can also be implemented using an ASIC or a Field Programmable Gate Array (FPGA). Alternatively, the control device 15 can also be implemented using other complex programmable logic devices (CPLDs) or simple programmable logic devices (SPLDs).

[0035] The control device 15 has the function of receiving input signals from the input interface 43 (described later) mounted on the console 40 or the scanner unit 10, or controlling the operation of the scanner unit 10 and the examination bed 30 according to control signals from the processing circuit 44. For example, the control device 15 controls the rotation of the rotating frame 13 upon receiving input signals, controls the tilting of the scanner unit 10, and controls the movement of the examination bed 30 and the top plate 33. Furthermore, the control of tilting the scanner unit 10 can be achieved by rotating the rotating frame 13 around an axis parallel to the X-axis direction using tilt angle information input from the input interface mounted on the scanner unit 10. In addition, the control device 15 can be provided on the scanner unit 10 or the console 40. Furthermore, the tilting angle of the scanner unit 10 can be set, for example, to a tilting angle in the range of 0 degrees to 90 degrees between the center line of the opening and the vertical line relative to the ground.

[0036] The examination bed 30 includes a base 31, a support frame 32, a top plate 33, and an examination bed drive device 34. The base 31 is mounted on the ground. The base 31 is a frame that supports the support frame 32 and is movable relative to the ground in the vertical direction (Y-axis direction). The support frame 32 is a frame disposed on the upper part of the base 31. The support frame 32 supports the top plate 33 so that it can slide along the rotation axis (Z-axis). The top plate 33 is a flexible plate for placing the subject P.

[0037] The examination bed drive unit 34 is housed within the frame of the examination bed 30. The examination bed drive unit 34 is a motor or actuator that generates power to move the support frame 32 and the top plate 33 on which the subject P is placed. The examination bed drive unit 34 operates under the control of the processing circuit 44 and the control console 40, etc.

[0038] The console 40 includes a memory 41, a display 42, an input interface 43, and processing circuitry 44. Data communication between the memory 41, display 42, input interface 43, and processing circuitry 44 is performed via a bus. Furthermore, although the console 40 and scanner unit 10 are described separately, the scanner unit 10 may also include the console 40 or a portion of its components.

[0039] The memory 41 is a storage device that stores various types of information, such as a Hard Disk Drive (HDD), Solid State Drive (SSD), or integrated circuit storage device. Besides HDDs and SSDs, the memory 41 can also be a removable storage medium such as a Compact Disc (CD), Digital Versatile Disc (DVD), Blu-ray Disc (BD), or flash memory. The memory 41 can also be a drive device that reads and writes various types of information between itself and semiconductor memory elements such as flash memory and RAM. Furthermore, the storage area of ​​the memory 41 can be located within the X-ray CT apparatus 1 or in an external storage device connected via a network.

[0040] The display 42 displays various information. Various types of displays can be appropriately used as the display 42. For example, a liquid crystal display (LCD), a ceramic ray tube (CRT) display, an organic electroluminescence display (OELD), or a plasma display can be used as the display 42. Furthermore, the display 42 can be installed in any location within the control room. Additionally, the display 42 can also be installed in the scanner unit 10. Furthermore, the display 42 can be a desktop unit or a tablet terminal capable of wireless communication with the main body of the control console 40. Additionally, one or more projectors can be used as the display 42.

[0041] The input interface 43 receives various input operations from the operator, converts the received input operations into electrical signals, and outputs them to the processing circuit 44. As the input interface 43, for example, a mouse, keyboard, trackball, switch, button, joystick, touchpad, and touch panel display can be appropriately used. Furthermore, in this embodiment, the input interface 43 is not limited to having physical operating components such as a mouse, keyboard, trackball, switch, button, joystick, touchpad, and touch panel display. For example, a processing circuit that receives electrical signals corresponding to input operations from an external input device separate from the device and outputs these electrical signals to the processing circuit 44 is also included in the example of the input interface 43. Additionally, the input interface 43 may also be provided in the scanner unit 10. Furthermore, the input interface 43 may also be configured as a tablet terminal or the like capable of wireless communication with the main body of the console 40.

[0042] The processing circuit 44 controls the overall operation of the X-ray CT device 1 based on the electrical signals of the input operation output from the input interface 43. The processing circuit 44 generates image data based on the electrical signals output from the X-ray detector 12. For example, the processing circuit 44 has processors such as CPU, MPU, and GPU, and memories such as ROM and RAM as hardware resources. The processing circuit 44 executes system control functions 441, image capture control functions 442, scanner control functions 443, image generation functions 444, image acquisition functions 445, object determination functions 446, angle determination functions 447, and display control functions 448 by executing a program expanded in memory.

[0043] Furthermore, the functions are not limited to being implemented by a single processing circuit. Multiple independent processors can also be combined to form a processing circuit, with each processor executing programs to achieve the respective functions.

[0044] In system control function 441, processing circuit 44 controls each part of X-ray CT device 1 according to the unfolded control program. In addition, in system control function 441, processing circuit 44 controls the drive of examination table 30 via control device 15.

[0045] In the imaging control function 442, the processing circuit 44 controls the X-ray high-voltage device 14, the control device 15 and the DAS 18 according to the imaging conditions to perform X-ray CT imaging.

[0046] In the scanner unit control function 443, the processing circuit 44 controls the lifting mechanism and the tilting mechanism according to the imaging mode to move the scanner unit 10. The imaging mode is envisioned to be any one of the imaging mode for imaging a subject P in a standing position (standing imaging mode), imaging mode for imaging a subject P in a sitting position (sitting imaging mode), and imaging mode for imaging a subject P in a supine position (supple imaging mode).

[0047] In the image generation function 444, the processing circuit 44 performs reconstruction processing on the projection data related to the subject P to generate a CT image. As the reconstruction processing, a filtered corrected inverse projection method or a successive approximation reconstruction method is used. Alternatively, a reconstruction processing method incorporating machine learning-based denoising processing can also be used. The processing circuit 44 converts the CT image into a cross-sectional image of arbitrary sections and a drawn image from any viewpoint. This conversion is based on input operations received from the operator via the input interface 43. For example, the processing circuit 44 performs three-dimensional image processing on the reconstructed image data, such as volume rendering, surface volume rendering, pixel value projection processing, MPR (Multi-Planer Reconstruction) processing, and CPR (Curved MPR) processing, to generate a drawn image from any viewpoint.

[0048] In acquisition function 445, processing circuit 44 acquires at least one of the inspection command and the imaging protocol. Additionally, in acquisition function 445, processing circuit 44 acquires angle information of the scanner unit 10 tilted by the tilting mechanism.

[0049] In the object determination function 446, the processing circuit 44 determines the imaging mode of the subject in the next imaging session by referring to at least one of the inspection command and the imaging protocol. Furthermore, in the object determination function 446, the processing circuit 44 determines whether the subject P exists within the opening of the scanner unit 10 based on the output information of a sensor or camera. The sensor is, for example, a pressure sensor disposed on the base plate. Based on the pressure value output by the pressure sensor, if the pressure value is above a threshold, it is determined that the subject P exists within the opening of the scanner unit 10. The camera is, for example, a camera mounted on the ceiling or wall. Based on image information output by the camera, for example, it is determined that the subject P exists within the opening of the scanner unit 10 through image recognition processing.

[0050] In the angle determination function 447, the processing circuit 44 determines whether the angle based on the angle information of the scanner unit 10 of the tilting mechanism is the angle used in the shooting mode.

[0051] In display control function 448, processing circuit 44 displays setting information related to the tilt state of scanner unit 10 relative to the support unit (described later) used in the imaging mode of the subject P on a display unit such as display 42, based on the tilt state of scanner unit 10. Additionally, in display control function 448, processing circuit 44 displays setting information related to the auxiliary tool used to support the subject P in the imaging mode on display unit such as display 42, based on the auxiliary tool used to support the subject P, and controls the display mode of the setting information. Furthermore, in display control function 448, processing circuit 44 displays the generated CT image and the drawn image, for example, on display 42.

[0052] Furthermore, the case where console 40 performs multiple functions as a single console is described, but multiple functions can also be performed by separate consoles. The processing circuitry 44 is not limited to being included in console 40; it can also be included in a comprehensive server that simultaneously processes projection data acquired from multiple medical imaging diagnostic devices. Post-processing can also be performed by either console 40 or an external workstation. Alternatively, processing can be performed simultaneously on both console 40 and a workstation.

[0053] X-ray CT apparatus 1 includes various types such as third-generation CT and fourth-generation CT, and any type can be applied to this embodiment. Here, the third-generation CT is a Rotate / Rotate-Type in which the X-ray tube and detector are integrated and rotate around the subject. The fourth-generation CT is a Stationary / Rotate-Type in which multiple X-ray detection elements arranged in a ring are fixed and only the X-ray tube rotates around the subject.

[0054] Furthermore, although not shown, the X-ray CT apparatus 1 may also have a communication interface. This communication interface connects the X-ray CT apparatus 1 to workstations, PACS (Picture Archiving and Communication System), HIS (Hospital Information System), and RIS (Radiology Information System) via a LAN (Local Area Network). The communication interface sends and receives various types of information between the workstation, PACS, HIS, and RIS at the connection destination.

[0055] Next, refer to Figures 2 to 4 The conceptual diagram illustrates the tilt state of the scanner unit 10 in each shooting mode of this embodiment.

[0056] Figure 2 This is a conceptual diagram showing the state of the scanner unit 10 in the standing imaging mode. In this embodiment, an X-ray CT apparatus that can be used for both supine and standing imaging is envisioned. That is, in the standing imaging mode, the scanner unit 10 is fixed at an angle with the opening OP facing the vertical direction and is connected to the support unit 20 which is erected in the vertical direction. The scanner unit 10 and the support unit 20 are connected via a tilting mechanism and a lifting mechanism. The tilting mechanism is a mechanism that rotates the scanner unit 10. For example, a general rotating mechanism based on gears, conveyors, etc., can be used. The lifting mechanism is a mechanism that moves the scanner unit 10 up and down in the vertical direction. For example, a general linear motion mechanism such as a rack and pinion mechanism can be used. With the subject P in an upright state and located in the opening OP, the scanner unit 10 is moved up and down by the lifting mechanism to image the subject P. In addition, pressure sensors and weight sensors can be embedded in the base plate 21 to measure the load under the scanner unit 10.

[0057] then, Figure 3 This is a conceptual diagram showing the state of the scanner unit 10 in a seated imaging mode. In this embodiment, the seated imaging mode includes both the case of sitting in a chair and the case of sitting in a wheelchair. Similar to the standing imaging mode, the opening OP of the scanner unit 10 faces the vertical direction. The subject P is located in the opening OP while seated in a wheelchair or chair, and the subject P is imaged by moving the scanner unit 10 up and down using a lifting mechanism.

[0058] Next, below, Figure 4 This is a conceptual diagram showing the state of the scanner unit 10 in the supine imaging mode.

[0059] Figure 4In this mode, the scanner unit 10 rotates 90 degrees from the orientation of the standing imaging mode, with the opening OP facing horizontally. The subject P is placed in a supine position on the top plate 33, and the subject P is imaged by moving the top plate 33 in a manner that penetrates the opening OP. That is, in both the standing and supine imaging modes, the body axis of the subject is approximately orthogonal.

[0060] Alternatively, the scanner unit 10 can also be configured to move in the horizontal direction. For example, the support unit 20 itself has a drive mechanism that drives the scanner unit 10 along the length of the examination table 30, and the scanner unit 10 moves together with the support unit 20 in the horizontal direction. Furthermore, although an example of a single support unit 20 is shown, another support unit 20 can also be arranged at a position opposite to the scanner unit 10, thus arranging two support units 20.

[0061] Next, refer to Figure 5 The flowchart below describes the first operating example of the X-ray CT apparatus 1 of this embodiment.

[0062] In step SA1, the processing circuit 44 determines which shooting mode is being used by referring to the inspection command, for example, through the object determination function 446.

[0063] In step SA2, by obtaining function 445, processing circuit 44 obtains setting information by referring to inspection command. The setting information includes scanner information related to the position and tilt angle of scanner unit 10 including shooting mode, and auxiliary tool information related to auxiliary tool supporting subject P.

[0064] For example, in a seated shooting mode, the orientation of the scanner unit 10's opening towards the vertical direction, the state of the scanner unit 10 required for each shooting mode (such as a chair or wheelchair), and the assistive tools are already determined. Therefore, the setting information can be determined based on the shooting mode. Specifically, for example, a correspondence table between shooting modes, scanner information, and assistive tool information is prepared. By using the acquisition function 445, the processing circuit 44 extracts the scanner information and assistive tool information corresponding to the shooting mode determined in step SA1 as setting information. Alternatively, a check command may also include the shooting mode and setting information.

[0065] In step SA3, through the display control function 448, the processing circuit 44 displays setting information, for example, on the monitor based on a pre-determined display method for each shooting mode. The pre-determined display method for each shooting mode is, for example, as follows: if it is a standing shooting mode, the background color is set to blue; if it is a sitting shooting mode, the background color is set to pink; and if it is a lying shooting mode, the background color is set to yellow, thus distinguishing them. Furthermore, it is not limited to this; any display method that allows the user to clearly understand the shooting mode category, such as changing the display font, display position (layout), or display icon for each shooting mode, is acceptable. Additionally, the shooting mode (lying shooting, standing shooting, sitting shooting) can also be displayed as text on the monitor. For example, in the case of lying shooting mode, text such as "lying shooting" or "lying shooting in progress" can be displayed on the monitor. Of course, as long as the user can easily understand the shooting mode, the above display methods and text information can be combined.

[0066] Furthermore, through the display control function 448, the processing circuit 44, based on the scanner information and auxiliary tool information included in the setting information, emphasizes the scanner unit 10 used in the shooting mode and the required auxiliary tools in the schematic diagram. Examples of emphasis display include thick lines, flashing, and coloring, but are not limited to these; any method that allows the user to perceive that information is emphasized is acceptable. Additionally, through the display control function 448, the processing circuit 44 can also emphasize the tilting direction and the moving direction of the scanner unit 10. Conversely, when the examination bed 30 and auxiliary tools are not needed in this shooting mode, display methods that are less conspicuous than the emphasized display and the normal display before the emphasized display can be used, such as displaying in a light color, graying out, increasing transmittance, or displaying with dashed lines. Furthermore, the examination bed 30 and auxiliary tools can be set to not be displayed when not used in this shooting mode. Moreover, "not conspicuous display method" refers to a display method that does not emphasize the user compared to the emphasized display, including the case of setting it to not display; in other words, it can be called a non-emphasized display. When using both emphasized and non-emphasized displays, the non-emphasized display should be less conspicuous than the emphasized display, and preferably less conspicuous than the normal display. Alternatively, when using both normal and non-emphasized displays, the non-emphasized display should be less conspicuous than the normal display, or it can be set to not be displayed.

[0067] Therefore, the units and auxiliary tools required for the shooting mode are highlighted, while the units and auxiliary tools not needed in the shooting mode are not highlighted, so that users can easily grasp the components required for the shooting mode.

[0068] Additionally, through the object determination function 446, the processing circuit 44 determines the imaging mode to be implemented in the next imaging session by referring to at least one of the inspection command and the imaging protocol. Alternatively, through the display control function 448, after imaging the subject P in the current imaging mode displayed in step SA3 above, based on the inspection command, the processing circuit 44 displays setting information related to the next imaging mode. In this case, imaging can also be ended in the current imaging mode and the auxiliary tools and examination bed 30 can be set to non-emphasis display, while the auxiliary tools and examination bed 30 to be used in the next imaging mode can be emphasized.

[0069] Alternatively, the processing circuit 44 can display messages to the user via the display control function 448 regarding the auxiliary tools required for the next shooting mode, and conversely, auxiliary tools not required in the next shooting mode. For example, when switching from a standing shooting mode to a sitting shooting mode, a chair may be required, so a message such as "Prepare a chair" may be displayed. Additionally, when switching from a sitting shooting mode using a chair to a lying shooting mode, a chair is not required in the lying shooting mode, so a message such as "Remove a chair" may be displayed.

[0070] Next, refer to Figure 6 The flowchart below describes a second operation example of the X-ray CT apparatus 1 according to this embodiment. In this second operation example, the status of the scanner unit 10 and the setting status of the auxiliary tools are monitored and displayed in real time, which differs from the first operation example.

[0071] Steps SA1 and SA2 and Figure 5 same.

[0072] In step SB1, the processing circuit 44, based on the scanner information, determines whether the tilt angle of the scanner unit 10 is an angle used in the shooting mode determined in step SA1, using the angle determination function 447. For example, in the standing shooting mode, even if the tilt angle is set to zero in the inspection command, if a tilt angle of 15 degrees occurs, it is determined that it is not an angle used in this standing shooting mode. If the tilt angle is an angle used in the shooting mode, the process proceeds to step SB2; if the tilt angle is an angle not used in the shooting mode, the process proceeds to step SB3.

[0073] In step SB2, the processing circuit 44 emphasizes the display of the scanner unit 10 when displaying setting information based on a display method predetermined for each imaging mode via the display control function 448. For example, in a schematic diagram of an X-ray CT apparatus and auxiliary tools, the outline can be displayed with thick lines.

[0074] In step SB3, since it is not a shooting condition, the processing circuit 44 sets the scanner unit 10 to a non-emphasis display as described above via the display control function 448. Then, it returns to step SB1 and repeats the process until it is set to a state where shooting based on the shooting mode can be performed.

[0075] In step SB4, the processing circuit 44 determines whether the auxiliary tool required for the determined shooting mode is present using the object determination function 446. For example, by analyzing the image captured by the camera installed in the examination room, it can be determined whether an auxiliary tool exists near the opening of the scanner unit 10. Alternatively, a pressure sensor can be installed; if the value of the pressure sensor is above a threshold and below the average weight of a person, it is determined that an auxiliary tool is present. Specifically, in the standing shooting mode, it is determined whether the column assisting the subject P in the standing position is set vertically within the opening of the scanner unit 10; in the sitting shooting mode, it is determined whether the chair is set below the opening of the scanner unit 10.

[0076] If the required auxiliary tools are set, proceed to step SB5; otherwise, proceed to step SB6.

[0077] In step SB5, the processing circuit 44, through the display control function 448, emphasizes the set auxiliary tools when displaying setting information based on a display method predetermined for each imaging mode. For example, in a schematic diagram of the X-ray CT apparatus and auxiliary tools, the outline can be shown with thick lines.

[0078] In step SB6, since it is not a shooting condition, the processing circuit 44 sets the auxiliary tool to a non-emphasis display as described above via the display control function 448. Then, it returns to step SB4 and repeats the process until it is set to a state where shooting based on the shooting mode can be performed.

[0079] Furthermore, for ease of explanation, the setting of the scanner unit 10's angle and the setting of the auxiliary tools are described as separate processing blocks, but they can also be processed in real time at the same timing. That is, the processing of steps SB1 to SB3 and the processing of steps SB4 to SB6 can also be executed in parallel.

[0080] Next, refer to Figure 7A as well as Figure 7B An example of displaying setting information in the standing shooting mode based on display control function 448 will be explained.

[0081] exist Figure 7A as well as Figure 7BThe display screen 60 shown includes a schematic diagram area 61 representing the X-ray CT apparatus 1, a scanner information area 62, and an operation panel area 63. The schematic diagram area 61 envisions the scanner unit 10, the support unit 20, and the examination table 30, and auxiliary tool information is also illustrated in the schematic diagram area 61. For example, in the standing imaging mode, it is envisioned that a column used to assist the subject P in maintaining an upright position extends vertically from the base plate within the opening. Therefore, when a column is required, it can also be illustrated in the schematic diagram area 61 as auxiliary tool information.

[0082] The scanner information area 62 displays the position and tilt angle of the scanner unit 10. The operation panel area 63 indicates the direction of movement of the support unit 20 if the scanner unit 10, the examination bed 30, and the support unit 20 are movable. For example, the panel displays the vertical movement and tilt of the scanner unit 10, and the direction of movement of the examination bed 30. Furthermore, the system control function 441 and the scanner unit control function 443 can control the movement of the selected scanner unit 10, support unit 20, and examination bed 30 by the user selecting this panel.

[0083] like Figure 7A As shown, the display control function 448 and the processing circuit 44, based on inspection commands, can emphasize the components required for the standing imaging mode and display components not needed in the standing imaging mode more lightly. For example, the scanner section 10 and the support section 20, whose opening faces the vertical direction, can be displayed more deeply with thick lines, while the examination bed 30, which is not used in the standing imaging mode, can be displayed more lightly with thin lines or dashed lines, thus setting it to a non-emphasis display. Alternatively, the examination bed 30, which is not used in the standing imaging mode, can be omitted from the display. In this way, the user can easily grasp the components required for the standing imaging mode.

[0084] And, as Figure 7B As shown, alternatively, through the display control function 448, the processing circuit 44 refers to the scanner information and displays only the directions in which the scanner unit 10, the support unit 20, and the examination table 30 can move. For example, in Figure 7B In the display, arrows 64 are shown to indicate that the scanner unit 10 can move vertically up and down. Alternatively, when the scanner unit 10 has moved to the uppermost part of its vertically movable range, only the downward arrow 64 is displayed. In this case, the processing circuit 44 can use the display control function 448 to emphasize the operation panel area 63 corresponding to the movable direction, and de-emphasize, gray out, or lightly display the operation panel area 63 corresponding to the non-movable direction, effectively making it non-displayed. Specifically, when the scanner unit 10 can only move vertically downwards, the operation panel indicating vertical upward movement can be grayed out.

[0085] Next, refer to Figure 8 An example of displaying setting information in the seated shooting mode based on display control function 448 will be explained.

[0086] and Figure 7A as well as Figure 7B The situation is the same, in Figure 8 In the display screen 60, a schematic diagram area 61, a scanner information area 62, and an operation panel area 63 are shown. The information displayed in the scanner information area 62 and the operation panel area 63, as well as the control methods, are the same as in the standing shooting mode.

[0087] Through the display control function 448, the processing circuit 44 can also emphasize the components required for the seated imaging mode and omit the components not required for the seated imaging mode based on examination commands, etc. For example, the scanner section 10 with its opening facing the vertical direction, the support section 20, and information about the wheelchair 71 used as an assistive tool in the seated imaging mode can be displayed with thicker, darker lines, while the examination bed 30, which is not used in the standing imaging mode, can be displayed with thinner or dashed lines. Alternatively, the examination bed 30, which is not used in the standing imaging mode, can be omitted from the display. Thus, the user can easily grasp the components required for the seated imaging mode. In particular, even though the opening of the scanner section 10 faces the same direction as in the standing imaging mode, by displaying the wheelchair 71, the user can easily understand that it is a seated imaging mode.

[0088] Alternatively, the processing circuit 44 can analyze, for example, the image captured by the camera through the display control function 448, thereby displaying the wheelchair 71 in gray or with a dashed line when the wheelchair 71 is not positioned below the scanner unit 10, and highlighting the wheelchair 71 with a solid line when the wheelchair 71 is positioned below the scanner unit 10. This allows the user to understand that an assistive tool such as a wheelchair or chair is needed in the seated shooting mode, and to know that no assistive tool has been prepared when the display is based on gray or dashed lines.

[0089] In addition, similar to the standing shooting mode, the processing circuit 44 can also display only the direction in which the scanner unit 10 and the support unit 20 can move by referring to the scanner information through the display control function 448.

[0090] Next, refer to Figure 9 An example of displaying setting information in the case of supine shooting mode based on display control function 448 will be explained.

[0091] exist Figure 9Similar to the standing and sitting imaging modes, the display screen 60 shows a schematic diagram area 61, a scanner information area 62, and an operation panel area 63. The information displayed in the scanner information area 62 and the operation panel area 63, as well as the control methods, are the same as in the standing imaging mode, except for the information regarding the additional examination bed 30.

[0092] Alternatively, through the display control function 448, the processing circuit 44, based on examination commands, emphasizes the components needed in the supine imaging mode and displays the components not needed in the sitting imaging mode more lightly. In the supine imaging mode, the scanner unit 10, the support unit 20, and the examination bed 30, with their openings facing horizontally, are displayed in thicker, darker lines. Alternatively, through the display control function 448, the processing circuit 44, referring to scanner information, displays only the directions in which the scanner unit 10, the support unit 20, and the examination bed 30 can be moved.

[0093] Furthermore, when switching from standing or sitting shooting mode to lying shooting mode, or vice versa, the scanner unit 10 needs to be tilted by 90 degrees. Considering the user's manual operation, the following scenario is also envisioned: if the opening is not tilted vertically or horizontally, the scanner unit's operation will terminate with the presence of a tilt angle. Therefore, the processing circuit 44, based on the angle information of the scanner unit 10, determines whether the angle is the angle used in the shooting mode using the angle determination function 447. Alternatively, if the processing circuit 44 determines, using the display control function 448, that the angle based on the angle information is not the angle used in the shooting mode, it displays an error message indicating that the scanner unit 10 has not been set to the specified angle.

[0094] Reference Figure 10 An example of displaying error messages in this embodiment will be described.

[0095] Through the display control function 448, the processing circuit 44 displays error information 91 on the display screen 60. Error information can be any kind of information that allows the user to understand the status of the scanner unit 10 and the settings of auxiliary tools, such as incorrect statements, explanations that the scanner unit 10 is not set to the specified angle, or information related to a tilt state other than the angle used in the determined shooting mode.

[0096] Figure 10 Imagine a situation where a shooting is to be performed in a standing shooting mode. Imagine that the opening of the scanner unit 10 is rotated to 90 degrees in the vertical direction, and the tilt angle is not zero degrees (0°), for example, there is a tilt angle of 5 degrees.

[0097] Alternatively, the processing circuit 44 can display an error message 91, such as "Scanner unit tilted! Please drive to tilt angle 0°," via the display control function 448. Furthermore, the schematic diagram area 61 can also display a schematic diagram of the scanner unit 10 in a state different from the angle used in shooting mode. That is, the scanner unit 10 can be emphasized in a way that exaggerates the actual tilt angle compared to the actual tilt angle. For example, the actual tilt angle is 5 degrees, but the scanner unit 10 can be displayed at a tilt angle of 45 degrees. Thus, a schematic diagram of the scanner unit 10 in a state of tilt angle larger than the actual tilt angle shown in the angle information can also be displayed. Therefore, the user can easily grasp the orientation of the opening of the scanner unit 10 that is not ready for shooting mode.

[0098] Alternatively, in any of the following modes—lying, standing, or sitting—if the tilt angle based on the angle information is the tilt angle of the scanner unit 10 used in the shooting mode, the processing circuit 44 can notify the user via the display control function 448 that the tilt angle of the scanner unit 10 has not shifted and has been correctly set. For example, the processing circuit 44 can also use the display control function 448 to display the schematic area 61 with a unique background color. Alternatively, it can display text such as "No tilt angle in shooting mode" or notify the user via sound. Thus, it is possible to clearly convey to the user that the angle of the scanner unit 10 in the shooting mode is correct.

[0099] Furthermore, in the above example, an example is shown where the display 42 and processing circuit 44 are mounted on the control console 40 of the X-ray CT apparatus. However, this is not a limitation. Alternatively, the display device and processing circuit 44 of this embodiment could be mounted on a portable device such as a smartphone, tablet, or laptop PC. This would be achieved by configuring an X-ray CT system capable of remote communication with the X-ray CT apparatus 1, which has a scanner unit 10 and a support unit 20. Alternatively, setting information could be displayed on a suspended monitor in the examination room, and operation information could be accessed on a nearby tablet. The display unit and the processing circuit 44, which includes display control functions 448, could be separate components.

[0100] According to the embodiment described above, for a scanner unit supported by a bracket having a tilting mechanism that tilts the scanner unit about a tilting axis, the processing circuit, through a display control function, controls the display method of setting information related to the tilting state of the scanner unit and the auxiliary tools supporting the subject, based on the tilting state of the scanner unit used in the imaging mode performed on the subject. In particular, the units and auxiliary tools required for standing, sitting, and lying imaging modes are different; therefore, the state related to the position and tilt angle of the scanner unit required for each imaging mode, as well as information related to the auxiliary tools, are emphasized and displayed. On the other hand, units and auxiliary tools not needed in that imaging mode are set to be displayed without emphasis.

[0101] Therefore, users can easily grasp the necessary components for shooting modes. That is, they can easily grasp the settings of shooting modes or the status of the device, thus improving the workflow.

[0102] The term "processor" used in the above description may refer to circuits such as CPUs, GPUs, Application Specific Integrated Circuits (ASICs), and programmable logic devices (e.g., Simple Programmable Logic Devices (SPLDs), Complex Programmable Logic Devices (CPLDs), and Field Programmable Gate Arrays (FPGAs)). A processor performs its function by reading and executing a program stored in a memory circuit. Alternatively, it may be configured to directly install programs into the processor's circuitry instead of storing the program in the memory circuitry. In this case, the processor performs its function by reading and executing the program loaded into the circuitry. Alternatively, it may not execute the program but instead implement the function corresponding to the program through a combination of logic circuits. Furthermore, the processors in this embodiment are not limited to being configured as a single circuit; multiple independent circuits may be combined to form a single processor and perform its function. Moreover, multiple components may be unified into a single processor to perform its function.

[0103] Some embodiments have been described, but these embodiments are provided by way of example and are not intended to limit the scope of the invention. These embodiments can be implemented in various other ways, and various omissions, substitutions, modifications, and combinations of embodiments are possible without departing from the spirit of the invention. These embodiments and their variations are included in the scope or spirit of the invention, as well as in the scope of the invention as described in the claims and its equivalents.

Claims

1. An X-ray CT device, characterized in that, have: The scanner department is equipped with a camera system; The support section has a tilting mechanism that tilts the scanner section about a tilting axis; The display unit shows setting information related to the tilt state of the scanner unit relative to the support unit; as well as The display control unit controls the display method of the setting information based on the tilt state of the scanner unit used in the imaging mode performed on the subject.

2. The X-ray CT apparatus according to claim 1, characterized in that, The setting information displayed on the display unit also includes information related to the auxiliary tools supporting the subject. The display control unit further controls the display method of the setting information based on the auxiliary tool used in the shooting mode performed on the subject.

3. The X-ray CT apparatus according to claim 1, characterized in that, The display control unit emphasizes the tilt state of the scanner unit according to the type of shooting mode.

4. The X-ray CT apparatus according to claim 1, characterized in that, The display control unit emphasizes the direction in which the scanner unit can tilt or the direction in which the scanner unit can move.

5. The X-ray CT apparatus according to claim 1, characterized in that, The display control unit changes the background color of the setting information according to the shooting mode.

6. The X-ray CT apparatus according to claim 1, characterized in that, The shooting mode is any one of the standing shooting mode, sitting shooting mode, and lying shooting mode.

7. The X-ray CT apparatus according to claim 1, characterized in that, The X-ray CT device also includes a determination unit that determines the imaging mode to be implemented in the subsequent imaging, referring to at least one of the examination order and the imaging protocol. After the current shooting session ends, the display control unit displays the setting information of the shooting mode to be implemented in the next shooting session, as determined by the determination unit.

8. The X-ray CT apparatus according to claim 1, characterized in that, The X-ray CT device also features: The acquisition unit acquires angle information related to the tilt angle of the scanner unit; and The determination unit determines whether the tilt angle based on the angle information is the tilt angle used in the shooting mode. If it is determined that the tilt angle is not the tilt angle used in the shooting mode, the display control unit displays error information related to the scanner unit.

9. The X-ray CT apparatus according to claim 8, characterized in that, The display control unit displays a schematic diagram of the scanner unit in a state where the tilt angle is larger than the actual tilt angle represented by the angle information as the error information.

10. The X-ray CT apparatus according to claim 1, characterized in that, The X-ray CT device also features: The acquisition unit acquires angle information related to the tilt angle of the scanner unit; and The determination unit determines whether the tilt angle based on the angle information is the tilt angle used in the shooting mode. If the tilt angle based on the angle information is the tilt angle used in the shooting mode, the display control unit will notify the user that the tilt angle of the scanner unit has been correctly set.

11. The X-ray CT apparatus according to claim 1, characterized in that, It also includes a determination unit that determines whether the subject exists within the scanner unit based on the output of a pressure sensor or a camera.

12. The X-ray CT apparatus according to claim 11, characterized in that, If the determination unit determines that the subject is present in the scanner unit, the display control unit displays a schematic diagram of the subject present in the scanner unit.

13. The X-ray CT apparatus according to claim 11, characterized in that, If the determination unit determines that the subject does not exist in the scanner unit, the display control unit displays or deletes a schematic diagram of the subject in a dashed line or in grayscale.

14. An X-ray CT system, characterized in that, have: An X-ray CT apparatus includes a scanner unit with an imaging system and a support unit with a tilting mechanism for tilting the scanner unit about a tilting axis. The display unit shows setting information related to the tilt state of the scanner unit relative to the support unit; as well as The display control unit controls the display method of the setting information based on the tilt state of the scanner unit used in the imaging mode performed on the subject.

15. A control method for an X-ray CT apparatus, the X-ray CT apparatus comprising a scanner unit having an imaging system and a support unit having a tilting mechanism for tilting the scanner unit about a tilting axis, characterized in that, The control method includes the following steps: Based on the tilt state of the scanner unit relative to the support unit used in the imaging mode performed on the subject, the display method of setting information related to the tilt state of the scanner unit is controlled.

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