JP2022026901A - X-ray ct apparatus - Google Patents

Abstract

To provide an X-ray CT apparatus that can readily move or incline an imaging apparatus.SOLUTION: An X-ray CT apparatus includes a rack device. The rack device includes: an imaging unit including an X-ray tube and an X-ray detector; a support unit for supporting the imaging unit so as to be capable of moving and inclining the imaging unit; an operation unit operated by an operator; and a support mechanism for supporting movement and inclination of the imaging unit in accordance with an operation input to the operation unit.SELECTED DRAWING: Figure 1

Description

The embodiments disclosed in the present specification and drawings relate to an X-ray CT apparatus.

The X-ray CT (Computed Tomography) device includes a lying-type X-ray CT device that takes images of a subject lying on a bed, and an image of a subject under a weight load such as standing or sitting. There is a standing type X-ray CT device to perform.

The X-ray CT apparatus is provided with a mechanism for moving or tilting the imaging device including an X-ray tube and an X-ray detector in order to adjust the imaging position. For example, the recumbent X-ray CT apparatus is provided with a mechanism for moving back and forth (moving the bed in the longitudinal direction) and tilting the imaging device. Further, the standing type X-ray CT apparatus is provided with a mechanism for vertically moving (moving in the vertical direction) and tilting the imaging device.

Japanese Unexamined Patent Publication No. 2004-130147

One of the problems to be solved by the embodiments disclosed in the present specification and the drawings is to provide an X-ray CT apparatus capable of easily moving and tilting an imaging device. However, the problems to be solved by the embodiments disclosed in the present specification and the drawings are not limited to the above problems. The problem corresponding to each effect by each configuration shown in the embodiment described later can be positioned as another problem.

The X-ray CT apparatus according to the embodiment includes a gantry apparatus. The gantry device includes an image pickup unit having an X-ray tube and an X-ray detector, a support unit that supports the image pickup unit in a movable and tiltable manner, an operation unit operated by an operator, and an operation on the operation unit. Accordingly, it has a support mechanism for supporting the movement or tilting of the image pickup unit.

FIG. 1 is a block diagram showing a configuration example of the X-ray CT apparatus according to the first embodiment. FIG. 2 is a diagram showing an example of the structure of the gantry device according to the first embodiment. FIG. 3 is a diagram for explaining an operation using the handle according to the first embodiment. FIG. 4 is a diagram showing an example of tilting the gantry body according to the first embodiment. FIG. 5 is a diagram showing an example of the configuration of the handle according to the first modification of the first embodiment. FIG. 6 is a diagram showing an example of the structure of the gantry device according to the second modification of the first embodiment. FIG. 7 is a diagram for explaining an operation using the handle according to the second modification of the first embodiment. FIG. 8 is a diagram showing an example of the structure of the gantry device according to the second embodiment. FIG. 9 is a diagram showing an example of the structure of the gantry device according to the first modification of the second embodiment. FIG. 10 is a diagram showing an example of the structure of the gantry device according to the third embodiment. FIG. 11 is a diagram showing an example of the structure of the gantry device according to the first modification of the third embodiment. FIG. 12 is a diagram showing an example of the structure of the gantry device according to another embodiment.

Hereinafter, the X-ray CT apparatus according to the embodiment will be described with reference to the drawings. The embodiments described below are merely examples, and are not limited to the contents described in the embodiments. Further, in principle, the contents described in one embodiment are similarly applied to other embodiments.

(First Embodiment)
FIG. 1 is a block diagram showing a configuration example of the X-ray CT apparatus according to the first embodiment. As shown in FIG. 1, the X-ray CT device 1 according to the first embodiment includes a gantry device 10 and a console device 40. The gantry device 10 includes a gantry main body 11, a support portion 12, and a control device 17. The configuration of the X-ray CT apparatus 1 shown in FIG. 1 is merely an example, and is not limited to the configuration shown in the figure.

In this embodiment, the axial direction perpendicular to the floor surface is defined as the Z-axis direction. Further, in a plane orthogonal to the Z-axis direction, arbitrary two-axis directions orthogonal to each other are defined as an X-axis direction and a Y-axis direction. In the present embodiment, the arrangement direction of the gantry main body 11 and the support portion 12 is defined as the Y-axis direction, and the directions orthogonal to the Y-axis direction and the Z-axis direction are defined as the X-axis direction. The definitions of the X-axis, the Y-axis, and the Z-axis in FIG. 1 are merely examples, and arbitrary three-axis directions orthogonal to each other can be defined as the X-axis, the Y-axis, and the Z-axis.

The gantry main body 11 has an opening 13 for accommodating an imaging site of a subject. Further, the gantry main body 11 has an X-ray tube 14, an X-ray detector 15, an X-ray high voltage device 16, a control device 17, and a DAS (Data Acquisition System) 18. The gantry main body 11 is also referred to as an image pickup device or an image pickup unit.

The X-ray tube 14 is a vacuum tube that generates X-rays by irradiating thermoelectrons from the cathode (filament) toward the anode (target) by applying a high voltage from the X-ray high voltage device 16. For example, the X-ray tube 14 includes a rotating anode type X-ray tube that generates X-rays by irradiating a rotating anode with thermions. In the vicinity of the X-ray tube 14, a wedge (also called a wedge filter or a bowtie filter) for adjusting the X-ray dose emitted from the X-ray tube 14 and an irradiation range of X-rays transmitted through the wedge 16 are narrowed down. A collimator (also called an X-ray diaphragm) is provided for this purpose.

The X-ray detector 15 detects X-rays irradiated from the X-ray tube 14 and passed through the subject P, and outputs an electric signal corresponding to the X-ray dose to the DAS 18. The X-ray detector 15 has, for example, a plurality of X-ray detection element trains in which a plurality of X-ray detection elements are arranged in a channel direction along one arc centering on the focal point of the X-ray tube 14. The X-ray detector 15 has, for example, a structure in which a plurality of X-ray detection element sequences in which a plurality of X-ray detection elements are arranged in the channel direction are arranged in a slice direction (column direction, low direction).

Further, the X-ray detector 15 is an indirect conversion type detector having, for example, a grid, a scintillator array, and an optical sensor array. The scintillator array has a plurality of scintillators, and the scintillator has a scintillator crystal that outputs a photon amount of light according to an incident X dose. The grid is arranged on the surface of the scintillator array on the X-ray incident side and has an X-ray shielding plate having a function of absorbing scattered X-rays. The grid may also be called a collimator (one-dimensional collimator or two-dimensional collimator). The optical sensor array has a function of converting into an electric signal according to the amount of light from the scintillator, and has, for example, an optical sensor such as a photomultiplier tube (PMT). The X-ray detector 15 may be a direct conversion type detector having a semiconductor element that converts incident X-rays into an electric signal.

The X-ray tube 14 and the X-ray detector 15 are provided on the rotating frame. The rotating frame is an annular frame that supports the X-ray tube 14 and the X-ray detector 15 so as to face each other, and rotates the X-ray tube 14 and the X-ray detector 15 around the rotation center axis C0. The rotating frame further includes and supports an X-ray high voltage device 16 and a DAS 18 in addition to the X-ray tube 14 and the X-ray detector 15. The detection data generated by the DAS 18 is a non-rotating portion (for example, a fixed frame; not shown in FIG. 1) of the gantry device by optical communication from a transmitter having a light emitting diode (LED) provided in the rotating frame. It is transmitted to a receiver having a photodiode provided in.) And transferred to the console device 40. The method of transmitting the detection data from the rotating frame to the non-rotating portion of the gantry device is not limited to the above-mentioned optical communication, and any method may be adopted as long as it is a non-contact type data transmission.

The X-ray high-voltage device 16 has an electric circuit such as a transformer and a rectifier, and has a function of generating a high voltage applied to the X-ray tube 14, and the X-ray tube 14 irradiates the device. It has an X-ray control device that controls the output voltage according to the X-ray. The high voltage generator may be a transformer type or an inverter type. The X-ray high voltage device 16 may be provided on the rotating frame or on the fixed frame (not shown) side of the gantry device 10. The fixed frame is a frame that rotatably supports the rotating frame.

The DAS 18 has an amplifier that amplifies the electric signal output from each X-ray detection element of the X-ray detector 15, and an A / D converter that converts the electric signal into a digital signal, and has detection data. To generate. The detection data generated by the DAS 18 is transferred to the console device 40. Further, DAS18 is an example of a data collection unit.

The support portion 12 is a structure (pillar) that supports the gantry main body 11 in a movable and tiltable manner, and is composed of a pillar-shaped frame for supporting the gantry main body 11. The support portion 12 is also referred to as a gantry support portion. Further, although FIG. 1 shows a case where the X-ray CT device 1 includes one support portion 12, the X-ray CT device 1 may include two or more support portions 12.

The control device 17 has a processing circuit having a CPU and the like, and a drive mechanism such as a motor and an actuator for moving and tilting the gantry main body 11. The control device 17 has a function of receiving an input signal from an input device (such as an input interface 43 described later) attached to the gantry device 10 and the console device 40 to control the operation of the gantry device 10. For example, the control device 17 controls to rotate the rotating frame in response to an input signal, and controls the movement (vertical movement) and tilt of the gantry main body 11. The movement and tilt control of the gantry main body 11 are executed according to the information (movement distance, tilt angle, etc.) input by the input interface attached to the gantry device 10. Further, the movement and tilt control of the gantry main body 11 are executed in response to the operation of the handle 111, which will be described later.

Further, the control device 17 has a support mechanism 171. The support mechanism 171 is a power assist mechanism (also referred to as a free assist mechanism or an electric assist mechanism) that supports the movement or inclination of the gantry main body 11 in response to an operation on the handle 111, which will be described later. For example, the support mechanism 171 generates a driving force for moving or tilting the gantry main body 11 in response to an operation on the handle 111, which will be described later. As for the mechanism in which the support mechanism 171 generates the driving force, a known technique related to the power assist mechanism can be arbitrarily applied, and thus the description thereof will be omitted. Further, the operation on the handle 111 will be described in detail in FIGS. 2 and later.

The control device 17 may be provided in the gantry device 10 or in the console device 40. When provided in the gantry device 10, the control device 17 may be provided in the gantry main body 11 or in the support portion 12, or in a separate housing different from the gantry main body 11 and the support portion 12. It may be provided.

The console device 40 includes a memory 41, a display 42, an input interface 43, and a processing circuit 44. Although the console device 40 will be described as a separate body from the gantry device 10, the gantry device 10 may include a part of each component of the console device 40 or the console device 40.

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, projection data and reconstructed image data. The memory 41 is an example of a storage unit.

The display 42 displays various information. For example, the display 42 outputs a medical image (CT image) generated by the processing circuit 44, a GUI (Graphical User Interface) for receiving various operations from the operator, and the like. For example, the display 42 is a liquid crystal display or a CRT (Cathode Ray Tube) display. Further, the display 42 may be provided on the gantry device 10. Further, the display 42 may be a desktop type or may be composed of a tablet terminal or the like capable of wireless communication with the console device 40 main body. The display 42 is an example of a display unit.

The input interface 43 receives various input operations from the operator, converts the received input operations into electric signals, and outputs the received input operations to the processing circuit 44. For example, the input interface 43 receives from the operator collection conditions for collecting projection data, reconstruction conditions for reconstructing a CT image, image processing conditions for generating a post-processed image from a CT image, and the like. .. For example, the input interface 43 includes a mouse, a keyboard, a trackball, a switch, and a button. It is realized by a joystick or the like. Further, the input interface 43 may be provided in the gantry device 10. Further, the input interface 43 may be composed of a tablet terminal or the like capable of wireless communication with the console device 40 main body. Further, the input interface 43 is an example of an input unit.

The processing circuit 44 controls the operation of the entire X-ray CT apparatus 1. For example, the processing circuit 44 executes the system control function 441, the preprocessing function 442, the reconstruction processing function 443, and the image processing function 444. Further, the processing circuit 44 is an example of a processing unit.

The system control function 441 controls various functions of the processing circuit 44 based on the input operation received from the operator via the input interface 43. For example, the system control function 441 controls the data collection process in the gantry device 10 by controlling the operation of the gantry device 10. Further, the system control function 441 controls the operation of the gantry device 10 so that the data collection process is executed under the imaging conditions specified by the operator.

The preprocessing function 442 generates data obtained by subjecting the detection data output from the data acquisition circuit 14 to preprocessing such as logarithmic conversion processing, offset correction processing, sensitivity correction processing between channels, and beam hardening correction. The data before preprocessing (detection data) and the data after preprocessing may be collectively referred to as projection data.

The reconstruction processing function 443 generates CT image data by performing reconstruction processing using a filter correction back projection method, a successive approximation reconstruction method, or the like on the projection data generated by the preprocessing function 442.

The image processing function 444 uses a known method to obtain CT image data of an arbitrary cross section or three-dimensional image data generated by the reconstruction processing function 443 based on an input operation received from the operator via the input interface 43. Convert to image data. The reconstruction processing function 443 may directly generate the three-dimensional image data.

The configuration of the X-ray CT apparatus 1 according to the first embodiment has been described above. Under such a configuration, the X-ray CT apparatus 1 can easily move and tilt the imaging device. Hereinafter, a configuration for easily moving and tilting the imaging device (frame body 11) will be described with reference to FIGS. 2, 3, and 4.

In the first embodiment, the case where the X-ray CT apparatus 1 is a standing type will be described. The standing type X-ray CT device 1 is a device that takes an image of a subject under a weight load such as a standing position or a sitting position, and the rotation center axis C0 at the time of non-tilt is perpendicular to the floor surface (vertical). Direction). However, this embodiment is not limited to the standing type X-ray CT apparatus 1. For example, the present embodiment can also be applied to a recumbent type X-ray CT apparatus that performs imaging on a subject lying on a bed. An example of the case where the X-ray CT apparatus 1 is in the recumbent position will be described later.

Further, the movement of the gantry main body 11 means "vertical movement of the gantry main body 11" in the standing type X-ray CT device 1 and "back and forth movement of the gantry main body 11" in the recumbent type X-ray CT device 1. include. Further, the inclination of the gantry main body 11 corresponds to the tilt of the gantry main body 11.

FIG. 2 is a diagram showing an example of the structure of the gantry device 10 according to the first embodiment. FIG. 2 illustrates a perspective view of the appearance of the gantry device 10. In FIG. 2, the tilt central axis C1 corresponds to the arrangement direction (that is, the Y-axis direction) of the gantry main body 11 and the support portion 12. Note that FIG. 2 illustrates a case where the tilt center axis C1 passes through the center of the gantry main body 11 in the X-axis direction and the Z-axis direction, but the present invention is not limited to this.

As shown in FIG. 2, the gantry device 10 includes a handle 111 operated by an operator. The handle 111 has a structure in which rod-shaped members that can be gripped by the operator are horizontally arranged. For example, the operator grips the handle 111 and pressurizes (applies a force) in an arbitrary direction to move the gantry body 11 up and down or tilt it. The handle 111 is also called a grip portion.

The handle 111 is provided on the gantry main body 11. For example, the handle 111 is provided on the tilt central axis C1 of the gantry main body 11. Specifically, the handle 111 is provided on the central axis C1 of the tilt in the exterior (outer peripheral surface) of the gantry main body 11 at the position farthest from the support portion 12.

The configuration shown in FIG. 2 is merely an example, and is not limited to the shown configuration. For example, in FIG. 2, the case where the handle 111 is a horizontally arranged rod-shaped member has been described, but the present invention is not limited to this. For example, the handle 111 does not necessarily have to be arranged horizontally, and may not be a rod-shaped member as long as it can be grasped by the operator. As an example, the handle 111 may be a recess formed on the outer peripheral surface of the gantry main body 11. However, in order to move the gantry body 11 up and down and tilt it, a horizontally arranged rod-shaped member is suitable.

Further, for example, the shapes of the gantry main body 11 and the support portion 12 are not limited to the shapes shown in the drawings. The shapes of the gantry main body 11 and the support portion 12 can be arbitrarily changed as long as the functions are not impaired.

FIG. 3 is a diagram for explaining an operation using the handle 111 according to the first embodiment. FIG. 3 illustrates a view of the handle 111 from the front (negative direction of the Y axis). In FIG. 3, the arrow A1 corresponds to the positive direction of the Z axis (upward in real space). The arrow A2 corresponds to the negative direction of the Z axis (downward in real space). The arrow A3 corresponds to the clockwise direction (right-handed screw direction) of the Y axis. The arrow A4 corresponds to the counterclockwise direction (left-handed screw direction) of the Y-axis.

In the example shown in FIG. 3, the operator operates the handle 111 to move the gantry body 11 up and down and tilt it. The support mechanism 171 supports the movement or inclination of the gantry main body 11 in response to the pressure applied to the handle 111. It should be noted that "pressurization" is not limited to applying a strong force, but it is sufficient that a force sufficient to activate the power assist mechanism is applied.

For example, when the handle 111 is operated in the linear direction, the support mechanism 171 generates a driving force for moving the gantry main body 11 in the operated direction. To give a specific example, when the operator wants to move the gantry main body 11 upward, the operator pressurizes the handle 111 in the direction of the arrow A1. When the support mechanism 171 (power assist mechanism) detects the pressurization of the handle 111 in the direction of the arrow A1, it generates a driving force for moving the gantry main body 11 in the direction of the arrow A1. As a result, the gantry main body 11 moves upward. As a result, the support mechanism 171 supports the upward movement of the gantry main body 11.

Further, when the operator wants to move the gantry main body 11 downward, the operator pressurizes the handle 111 in the direction of the arrow A2. When the support mechanism 171 detects the pressurization of the handle 111 in the direction of the arrow A2, the support mechanism 171 generates a driving force for moving the gantry main body 11 in the direction of the arrow A2. As a result, the gantry main body 11 moves downward. As a result, the support mechanism 171 supports the downward movement of the gantry main body 11.

Further, when the handle 111 is operated in the rotational direction, the support mechanism 171 generates a driving force for tilting the gantry main body 11 in the operated direction. To give a specific example, when the operator wants to tilt the gantry main body 11 in the clockwise direction, the operator pressurizes the handle 111 in the direction of the arrow A3. When the support mechanism 171 detects the pressurization of the handle 111 in the direction of the arrow A3, the support mechanism 171 generates a driving force for tilting the gantry main body 11 in the direction of the arrow A3. As a result, as shown in FIG. 4, the gantry main body 11 tilts in the clockwise direction about the central axis C1. As a result, the support mechanism 171 supports the tilting of the gantry main body 11 in the clockwise direction. Note that FIG. 4 is a diagram showing an example of tilting the gantry main body 11 according to the first embodiment.

Further, when the operator wants to tilt the gantry main body 11 in the counterclockwise direction, the operator pressurizes the handle 111 in the direction of the arrow A4. When the support mechanism 171 detects the pressurization of the handle 111 in the direction of the arrow A4, the support mechanism 171 generates a driving force for tilting the gantry main body 11 in the direction of the arrow A4. As a result, the gantry main body 11 tilts in the counterclockwise direction about the central axis C1. As a result, the support mechanism 171 supports the tilting of the gantry main body 11 in the counterclockwise direction.

The configuration shown in FIG. 3 is merely an example, and is not limited to the shown configuration. For example, in FIG. 3, the case where the center of the handle 111 passes through the central axis C1 has been described, but the present invention is not limited to this, and the center of the handle 111 and the central axis C1 may be deviated from each other. However, in order not to impair the function of the handle 111, it is preferable that at least a part of the structure of the handle 111 is arranged so as to pass through the central axis C1.

As described above, in the X-ray CT apparatus 1, the gantry device 10 includes a gantry main body 11, a support portion 12, a handle 111, and a support mechanism 171. The gantry main body 11 has an X-ray tube and an X-ray detector. The support portion 12 supports the gantry main body 11 so as to be movable and tiltable. The handle 111 is operated by an operator. The support mechanism 171 supports the movement or tilting of the gantry main body 11 in response to the operation with respect to the handle 111. As a result, the X-ray CT apparatus 1 can easily move and tilt the gantry main body 11 (imaging device). For example, since the support mechanism 171 (power assist mechanism) is operated only by operating the handle 111, the operator can easily move the image pickup device up and down and tilt it without applying a large force.

Further, in the first embodiment, the handle 111 is provided on the central axis C1 of the tilt. Thereby, the rotation direction of the handle 111 and the tilt direction (rotation direction) of the tilt can be associated with each other. As a result, the tilt of the gantry main body 11 can be controlled by operating (pressurizing) the handle 111 in the rotational direction.

Further, the vertical movement of the gantry main body 11 can be controlled by operating (pressurizing) the handle 111 in the vertical direction. That is, the support mechanism 171 can identify the vertical movement and tilt of the gantry main body 11 by operating the handle 111 in different directions. Therefore, the operator can easily move the gantry body 11 up and down and tilt it with one (common) handle 111 without performing an operation of designating (identifying) or switching between up and down movement and tilt. Can be controlled.

(Modification 1 of the first embodiment)
The handle 111 described in the first embodiment is not necessarily limited to the above configuration. For example, the handle 111 may have a start switch for controlling the start (ON / OFF) of the support mechanism 171 in order to prevent the support mechanism 171 from malfunctioning.

FIG. 5 is a diagram showing an example of the configuration of the handle 111 according to the first modification of the first embodiment. As shown in FIG. 5, the handle 111 includes an activation switch 112 that controls activation (ON / OFF) of the support mechanism 171. The start switch 112 is, for example, a push button switch, and controls ON and OFF of the support mechanism 171 by pressing and releasing the switch.

For example, when the handle 111 is operated in the linear direction while the start switch 112 is pressed, the support mechanism 171 generates a driving force for moving the gantry main body 11 in the operated direction. Further, when the handle 111 is operated in the rotational direction while the start switch 112 is pressed, the support mechanism 171 generates a driving force for tilting the gantry main body 11 in the operated direction. Since the process of generating the driving force in response to the operation of the handle 111 is the same as that described in FIG. 3, the description thereof will be omitted.

On the other hand, the support mechanism 171 does not start if the start switch 112 is released. That is, the support mechanism 171 does not generate a driving force even if the handle 111 is operated in the linear direction or the rotational direction with the start switch 112 released. According to this, the X-ray CT apparatus 1 can prevent the support mechanism 171 from malfunctioning.

The configuration shown in FIG. 5 is merely an example, and is not limited to the shown configuration. For example, the start switch 112 is not limited to a push button switch, and a switch having an arbitrary shape such as a toggle switch or a rocker switch can be applied.

Further, the start switch 112 does not necessarily have to be installed on the handle 111. For example, the start switch 112 may be installed at an arbitrary position on the exterior of the gantry main body 11. However, in order to maintain good operability, it is preferable that the start switch 112 is provided in the vicinity of the handle 111.

(Modification 2 of the first embodiment)
The handle 111 described in the first embodiment does not necessarily have to be provided on the central axis C1 of the tilt. For example, the handle 111 may be provided on a plane of the gantry main body 11 that passes through the cross section taken by the gantry main body 11.

FIG. 6 is a diagram showing an example of the structure of the gantry device 10 according to the second modification of the first embodiment. FIG. 6 illustrates a perspective view of the appearance of the gantry device 10. In FIG. 6, the tilt central axis C1 corresponds to the arrangement direction (that is, the Y-axis direction) of the gantry main body 11 and the support portion 12.

As shown in FIG. 6, the handle 113 is provided on a plane of the gantry main body 11 that passes through the cross section taken by the gantry main body 11. Here, the imaged cross section corresponds to, for example, a slice cross section passing through the center of FOV (Field Of View). Specifically, the handle 113 is provided at the end portion of the exterior (outer peripheral surface) of the gantry main body 11 on a plane passing through the image pickup cross section and in the X-axis direction.

The configuration shown in FIG. 6 is merely an example, and is not limited to the shown configuration. For example, the handle 113 does not necessarily have to be provided at the end in the X-axis direction.

FIG. 7 is a diagram for explaining an operation using the handle 113 according to the second modification of the first embodiment. FIG. 7 illustrates a view of the handle 117 as viewed from the front (positive direction of the X-axis). In FIG. 7, the arrow A5 corresponds to the positive direction of the Z axis (upward in real space). The arrow A6 corresponds to the negative direction of the Z axis (downward in real space).

As shown in FIG. 7, the handle 113 has selection switches 114 and 115 for selecting vertical movement or tilt of the gantry main body 11. For example, the selection switches 114 and 115 are both push button switches. The selection switch 114 is a switch for selecting vertical movement by pressing the selection switch 114, and the selection switch 115 is a switch for selecting tilt by pressing the selection switch 114. The operator operates the handle 113 and the selection switches 114 and 115 to move the gantry body 11 up and down and tilt it.

For example, when the handle 113 is operated with the vertical movement of the gantry body 11 selected by the selection switch 114, the support mechanism 171 generates a driving force for moving the gantry body 11 in the operated direction. Let me. To give a specific example, when the operator wants to move the gantry main body 11 upward, the operator pressurizes the handle 113 in the direction of the arrow A5 while pressing the selection switch 114. When the support mechanism 171 detects the pressurization of the handle 113 in the direction of the arrow A5, the support mechanism 171 generates a driving force for moving the gantry main body 11 in the direction of the arrow A5. As a result, the gantry main body 11 moves upward. As a result, the support mechanism 171 supports the upward movement of the gantry main body 11.

Further, when the operator wants to move the gantry main body 11 downward, the operator pressurizes the handle 113 in the direction of the arrow A6 while pressing the selection switch 114. When the support mechanism 171 detects the pressurization of the handle 113 in the direction of the arrow A6, the support mechanism 171 generates a driving force for moving the gantry main body 11 in the direction of the arrow A6. As a result, the gantry main body 11 moves downward. As a result, the support mechanism 171 supports the downward movement of the gantry main body 11.

Further, when the handle 113 is operated with the tilt of the gantry main body 11 selected by the selection switch 115, the support mechanism 171 generates a driving force for tilting the gantry main body 11 in the operated direction. .. To give a specific example, when the operator wants to tilt the gantry main body 11 in the counterclockwise direction, the operator pressurizes the handle 113 in the direction of the arrow A5 while pressing the selection switch 115. When the support mechanism 171 detects the pressurization of the handle 113 in the direction of the arrow A5, the support mechanism 171 generates a driving force for tilting the gantry main body 11 in the direction of the arrow A5. As a result, the gantry main body 11 tilts in the counterclockwise direction about the central axis C1. As a result, the support mechanism 171 supports the tilting of the gantry main body 11 in the counterclockwise direction.

Further, when the operator wants to tilt the gantry main body 11 in the clockwise direction, the operator pressurizes the handle 113 in the direction of the arrow A6 while pressing the selection switch 115. When the support mechanism 171 detects the pressurization of the handle 113 in the direction of the arrow A6, the support mechanism 171 generates a driving force for tilting the gantry main body 11 in the direction of the arrow A6. As a result, the gantry main body 11 tilts in the clockwise direction about the central axis C1. As a result, the support mechanism 171 supports the tilting of the gantry main body 11 in the clockwise direction.

The configuration shown in FIG. 7 is merely an example, and is not limited to the shown configuration. For example, the selection switches 114 and 115 are not limited to push button switches, and switches of any shape such as toggle switches and rocker switches can be applied.

Further, the selection switches 114 and 115 do not necessarily have to be installed on the handle 113. For example, the selection switches 114 and 115 may be installed at arbitrary positions on the exterior of the gantry main body 11. However, in order to maintain good operability, it is preferable that the selection switches 114 and 115 are provided in the vicinity of the handle 113.

Further, the selection switches 114 and 115 do not necessarily have to be equipped with two switches. For example, it may be configured to switch between vertical movement and tilt by pressing and releasing one push button switch.

As described above, the handle 113 according to the second modification of the first embodiment is provided on the plane of the gantry main body 11 that passes through the image pickup cross section of the gantry main body 11. Therefore, the X-ray CT apparatus 1 can easily move and tilt the gantry main body 11. For example, the operator can adjust the position of the imaged cross section while inferring the position of the imaged cross section from the position of the handle 113 operated by the operator, so that the position of the imaged cross section can be intuitively adjusted.

(Second embodiment)
In the first embodiment, the case where the gantry main body 11 is supported by one support portion 12 is illustrated, but the embodiment is not limited to this. For example, this embodiment is also applicable when the gantry main body 11 is supported by two support portions 12.

The X-ray CT device 1 according to the second embodiment has the same configuration as the X-ray CT device 1 shown in FIG. 1, except that the gantry device 20 is provided instead of the gantry device 10. The gantry device 20 has the same configuration as the gantry device 10 shown in FIG. 1, except that the gantry main body 21 is supported by two support portions 22A and 22B. In other words, in the X-ray CT apparatus 1 according to the second embodiment, each configuration of the X-ray tube 14, the X-ray detector 15, the X-ray high voltage apparatus 16, the control apparatus 17, DAS18, and the console apparatus 40 is Since each configuration is the same as that shown in FIG. 1, the description thereof will be omitted.

FIG. 8 is a diagram showing an example of the structure of the gantry device 20 according to the second embodiment. FIG. 8 illustrates a perspective view of the appearance of the gantry device 20. In FIG. 8, the tilt central axis C2 corresponds to the arrangement direction (that is, the Y-axis direction) of the gantry main body 21 and the support portions 22A and 22B. Further, the gantry main body 21 has an opening 23.

As shown in FIG. 8, the gantry device 20 includes a handle 211 operated by an operator. The handle 211 has a structure in which rod-shaped members that can be gripped by the operator are horizontally arranged. For example, the operator grips the handle 211 and pressurizes it in an arbitrary direction to move the gantry body 21 up and down and tilt it.

The handle 211 is provided on the gantry main body 21. For example, the handle 211 is provided on a plane of the gantry main body 21 that passes through the cross section taken by the gantry main body 21. Specifically, the handle 211 is provided at the end portion of the exterior (outer peripheral surface) of the gantry main body 21 on a plane passing through the imaging cross section in the Y-axis direction.

The handle 211 has a selection switch for selecting vertical movement or tilt of the gantry main body 21. For example, the selection switch included in the handle 211 is the same as the selection switches 114 and 115 shown in FIG. 7.

For example, in the control device 17 according to the second embodiment, when the handle 211 is operated with the vertical movement of the gantry main body 21 selected by the selection switch, the support mechanism 171 mounts in the operated direction. A driving force for moving the main body 21 is generated. Further, when the handle 211 is operated with the tilt of the gantry main body 21 selected by the selection switch, the support mechanism 171 generates a driving force for tilting the gantry main body 21 in the operated direction. Since the operation using the handle 211 is the same as the content described with reference to FIG. 7, the description thereof will be omitted.

As described above, even when the gantry main body 21 is supported by the two support portions 22A and 22B, the X-ray CT apparatus 1 can easily move and incline the gantry main body 21. For example, the operator can adjust the position of the imaged cross section while inferring the position of the imaged cross section from the position of the handle 211 operated by the operator, so that the position of the imaged cross section can be intuitively adjusted.

(Modification 1 of the second embodiment)
Further, even when the gantry main body 21 is supported by the two support portions 22A and 22B, the handle can be provided on the central axis C2 of the tilt.

FIG. 9 is a diagram showing an example of the structure of the gantry device 20 according to the first modification of the second embodiment. FIG. 9 illustrates a perspective view of the appearance of the gantry device 20. In FIG. 9, the tilt central axis C2 corresponds to the arrangement direction (that is, the X-axis direction) of the gantry main body 21 and the support portions 22A and 22B.

Here, as shown in FIG. 9, the support portion 22A and the support portion 22B are arranged at both ends on the central axis C2 of the gantry main body 21. Therefore, the handle 212 according to the first modification of the second embodiment is provided so as to penetrate at least one of the support portion 22A and the support portion 22B.

For example, the support portion 22A has a groove 221 that penetrates the support portion 22A and is formed along the moving direction of the gantry main body 21. In the standing type X-ray CT apparatus 1, since the gantry main body 21 moves up and down, the groove 221 is formed along the vertical direction (Z-axis direction).

The handle 212 is provided on the gantry main body 21 so as to pass through the inside of the groove 221 and project from the exterior of the support portion 22A. Specifically, the handle 212 has a second rod-shaped member parallel to the X-axis direction in addition to the first rod-shaped member parallel to the Y-axis direction that is directly gripped by the operator. The second rod-shaped member is longer than the length of the support portion 22A in the X-axis direction and is arranged inside the groove 221. Then, the first rod-shaped member of the handle 212 and the gantry main body 21 are attached to both ends of the second rod-shaped member. As a result, the handle 212 is provided so as to penetrate the support portion 22A.

Since the operation using the handle 212 is the same as the content described with reference to FIG. 3, the description thereof will be omitted. The handle 212 does not necessarily have to be provided with a switch, but may be provided with the above-mentioned start switch and selection switch.

In this way, even when the gantry main body 21 is supported by the two support portions 22A and 22B, the handle 212 can be provided on the central axis C2 of the tilt. As a result, the X-ray CT device 1 can easily move the gantry main body 21 up and down and tilt it.

In FIG. 9, the case where the handle 212 is provided so as to penetrate the support portion 22A has been described, but the embodiment is not limited to this. For example, the handle 212 may be provided so as to penetrate the support portion 22B, or two handles may be provided so as to penetrate the support portion 22A and the support portion 22B, respectively.

(Third embodiment)
In the first and second embodiments, the case where the X-ray CT apparatus 1 is a standing type is illustrated, but the embodiment is not limited to this. For example, the present embodiment can be applied even when the X-ray CT apparatus 1 is a recumbent type.

The lying-down X-ray CT device 1 is a device that performs imaging on a subject lying on a bed. For example, the recumbent X-ray CT apparatus is provided with a mechanism for moving back and forth (moving the bed in the longitudinal direction) and tilting the imaging device.

The X-ray CT apparatus 1 according to the third embodiment has the same configuration as the X-ray CT apparatus 1 shown in FIG. 1, except that the gantry apparatus 30 is provided in place of the gantry apparatus 10. The gantry device 30 has the same configuration as the gantry device 10 shown in FIG. 1, except that it is configured in a recumbent position. In other words, in the X-ray CT apparatus 1 according to the second embodiment, each configuration of the X-ray tube 14, the X-ray detector 15, the X-ray high voltage apparatus 16, the control apparatus 17, DAS18, and the console apparatus 40 is Since each configuration is the same as that shown in FIG. 1, the description thereof will be omitted.

FIG. 10 is a diagram showing an example of the structure of the gantry device 30 according to the third embodiment. FIG. 10 illustrates a perspective view of the appearance of the gantry device 30. In FIG. 10, the rotation center axis C3 of the X-ray tube 14 and the X-ray detector 15 corresponds to the Z-axis direction.

As shown in FIG. 10, the gantry device 30 has a gantry main body 31 and a support portion 32. Further, the gantry main body 31 includes surface switches 311, 312 operated by an operator. For example, the surface switch 311 is provided on the first surface of the gantry main body 31. Further, the surface switch 312 is provided on the second surface of the gantry main body 31, which is different from the first surface. For example, the surface switch 311 is a touch switch that is entirely arranged on the negative surface in the Z-axis direction of the exterior of the gantry main body 31. The surface switch 312 is a touch switch that is entirely arranged on the positive side surface in the Z-axis direction of the exterior of the gantry main body 31. For example, the operator touches the surface switches 311, 312 to move the gantry main body 31 back and forth.

Each surface switch 311, 312 is preset with a moving direction to be moved by the operation of each switch. For example, the surface switch 311 is preset to be moved in the direction of the arrow A7 by the operation. The surface switch 312 is preset to be moved in the direction of arrow A8 by its operation.

In the control device 17 according to the third embodiment, the support mechanism 171 generates a driving force for moving the gantry main body 31 in the first direction when the surface switch 311 is operated. Specifically, the support mechanism 171 generates a driving force for moving the gantry main body 31 in the direction of the arrow A7 while the surface switch 311 is being touched by the operator. Further, the support mechanism 171 stops the generation of the driving force when the surface switch 311 is separated from the operator (human body).

Further, when the surface switch 312 is operated, the support mechanism 171 generates a driving force for moving the gantry main body 31 in a second direction different from the first direction. Specifically, the support mechanism 171 generates a driving force for moving the gantry main body 31 in the direction of the arrow A8 while the surface switch 312 is being touched by the operator. Further, the support mechanism 171 stops the generation of the driving force when the surface switch 312 is separated from the operator (human body).

Note that FIG. 10 describes a case where the surface switches 311, 312 are arranged on each surface as a whole, but the embodiment is not limited to this. For example, the surface switches 311, 312 may be partially arranged on each surface.

Further, the surface switches 311, 312 do not necessarily have to be touch switches, and for example, switches having any shape such as push button switches, toggle switches, and rocker switches can be applied.

Further, the preset moving direction is not limited to the illustrated example, and can be arbitrarily changed. For example, the support mechanism 171 may generate a driving force in the direction of the arrow A8 by operating the surface switch 311.

Further, the surface switches 311, 312 are not necessarily limited to the illustrated example. For example, the surface switches 311, 312 may be provided on at least a part of the surface of the gantry main body 31.

As described above, even when the X-ray CT apparatus 1 is in the recumbent position, the gantry main body 31 can be easily moved and tilted.

In the third embodiment, the case where the surface switches 311, 312 are applied to the recumbent type X-ray CT apparatus 1 has been described, but the embodiment is not limited to this, and the standing type is not limited to this. It may be applied to the X-ray CT apparatus 1. For example, a surface switch can be provided on the upper surface (positive side surface in the Z-axis direction) and the lower surface (negative side surface in the Z-axis direction) of the gantry main body 11 shown in FIG.

(Modification 1 of the third embodiment)
Further, even when the X-ray CT apparatus 1 is in the recumbent position, the handle can be provided on the central axis of the tilt.

FIG. 11 is a diagram showing an example of the structure of the gantry device 30 according to the first modification of the third embodiment. FIG. 11 illustrates a perspective view of the appearance of the gantry device 30. In FIG. 11, the tilt center axis C4 is orthogonal to the rotation center axis C3 and is parallel to the X-axis direction.

Here, as shown in FIG. 11, support portions 32 are arranged at both ends on the central axis C4 of the gantry main body 31. Therefore, the handle 313 according to the first modification of the third embodiment is provided so as to penetrate the support portion 32.

For example, the support portion 32 has a groove that penetrates the support portion 32 and is formed along the moving direction of the gantry main body 31. In the recumbent type X-ray CT apparatus 1, since the gantry main body 31 moves back and forth, a groove is formed along the front-back direction (Z-axis direction). This groove is the same as the groove 221 except that it is formed parallel to the XZ plane of FIG.

The handle 313 is provided on the gantry main body 31 so as to pass through the inside of the groove and project from the exterior of the support portion 32. Since the operation using the handle 313 is the same as the content described with reference to FIG. 3, the description thereof will be omitted. The handle 313 does not necessarily have to be provided with a switch, but may be provided with the above-mentioned start switch and selection switch.

As described above, even when the X-ray CT apparatus 1 is in the recumbent position, the handle 313 can be provided on the central axis C4 of the tilt. As a result, the X-ray CT device 1 can easily move the gantry body 31 up and down and tilt it.

(Other embodiments)
In addition to the above-described embodiments, various different embodiments may be performed.

(Installation of the handle on the support)
In the above embodiment, the case where the handle 111 is provided on the gantry main body 11 has been described, but the embodiment is not limited to this. For example, the handle 111 may be provided on the support portion 12.

FIG. 12 is a diagram showing an example of the structure of the gantry device 10 according to another embodiment. FIG. 12 illustrates a perspective view of the appearance of the gantry device 10. In FIG. 12, the tilt central axis C1 corresponds to the arrangement direction (that is, the Y-axis direction) of the gantry main body 11 and the support portion 12.

As shown in FIG. 12, the handle 116 is attached to the surface of the support portion 12 opposite to the surface on which the gantry main body 11 is attached. Here, the rotation center axis C5 of the handle 116 is arranged parallel to the tilt center axis C1. Thereby, the rotation direction of the handle 116 and the tilt direction (rotation direction) of the tilt can be associated with each other. As a result, the tilt of the gantry main body 11 can be controlled by operating (pressurizing) the handle 116 in the rotational direction. Since the process of generating the driving force in response to the operation of the handle 116 is the same as that described in FIG. 3, the description thereof will be omitted.

Further, each component of each of the illustrated devices 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.

Further, among the processes described in the above-described embodiments and modifications, all or part of the processes described as being automatically performed can be manually performed, or can be performed manually. It is also possible to automatically perform all or part of the described processing by a known method. In addition, the processing procedure, control procedure, specific name, and information including various data and parameters shown in the above document and drawings can be arbitrarily changed unless otherwise specified.

According to at least one embodiment described above, the image pickup apparatus can be easily moved and tilted.

Although some embodiments have been described, these embodiments are presented as examples and are not intended to limit the scope of the invention. These embodiments can be implemented in various other embodiments, and various omissions, replacements, changes, and combinations of embodiments can be made without departing from the gist of the invention. These embodiments and variations thereof are included in the scope of the invention described in the claims and the equivalent scope thereof, as are included in the scope and gist of the invention.

1 X-ray CT device 10 Mount device 11 Mount body 12 Support part 13 Opening 14 X-ray tube 15 X-ray detector 16 X-ray high voltage device 17 Control device 18 DAS
111 Handle 171 Support mechanism

Claims (12)

An image pickup unit having an X-ray tube and an X-ray detector,
A support portion that supports the image pickup unit in a movable and tiltable manner, and a support portion.
The operation unit operated by the operator and
A support mechanism that supports the movement or tilting of the image pickup unit in response to an operation on the operation unit, and
Equipped with a gantry device
X-ray CT device. The operation unit is a handle gripped by the operator or a surface switch provided on at least a part of the surface of the image pickup unit.
The X-ray CT apparatus according to claim 1. The operation unit is provided in the image pickup unit.
The X-ray CT apparatus according to claim 1 or 2. The operation unit is provided on the central axis of the inclination of the image pickup unit.
The X-ray CT apparatus according to claim 3. The support mechanism
When the operation unit is operated in a linear direction, a driving force for moving the image pickup unit in the operated direction is generated.
When the operation unit is operated in the rotational direction, a driving force for tilting the image pickup unit in the operated direction is generated.
The X-ray CT apparatus according to claim 4. The operation unit has a start switch that controls the start of the support mechanism.
The X-ray CT apparatus according to claim 4 or 5. The operation unit has a selection switch for selecting the movement or tilt of the image pickup unit.
The X-ray CT apparatus according to claim 4 or 5. The support portion has a groove that penetrates the support portion and is formed along the moving direction of the image pickup portion.
The operation unit is provided in the image pickup unit so as to pass through the inside of the groove and project from the exterior of the support unit.
The X-ray CT apparatus according to any one of claims 3 to 7. The operation unit is provided on a plane of the image pickup unit that passes through the image pickup cross section of the image pickup unit.
The X-ray CT apparatus according to claim 3. The operation unit has a selection switch for selecting the movement or tilt of the image pickup unit.
The support mechanism
When the operation unit is operated while the movement of the image pickup unit is selected by the selection switch, a driving force for moving the image pickup unit is generated in the operated direction.
When the operation unit is operated with the tilt of the image pickup unit selected by the selection switch, a driving force for tilting the image pickup unit in the operated direction is generated.
The X-ray CT apparatus according to claim 9. The operation unit is provided on the support unit.
The X-ray CT apparatus according to claim 1 or 2. The operation unit is
The first surface switch provided on the first surface of the image pickup unit and
The image pickup unit includes a second surface switch provided on a second surface different from the first surface.
The support mechanism
When the first surface switch is operated, a driving force for moving the image pickup unit in the first direction is generated.
When the second surface switch is operated, a driving force for moving the image pickup unit in a second direction different from the first direction is generated.
The X-ray CT apparatus according to claim 1 or 2.

Images