X-ray diagnostic device

Abstract

To enable a subject to easily and appropriately grip a hand grip according to a body type of the subject.SOLUTION: An X-ray diagnostic device according to an embodiment includes a hand grip and a lock mechanism. The hand grip is connected to a top plate and is gripped by a subject on the top plate. The hand grip projects in a direction orthogonal to the top plate and is movable in a longitudinal direction of the top plate. The lock mechanism regulates movement of the hand grip.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The embodiments disclosed in this specification and the drawings relate to an X-ray diagnostic apparatus.

Background Art

[0002] Conventionally, in an X-ray diagnostic apparatus, a gastrointestinal examination of a subject has been performed. In the gastrointestinal examination, the X-ray diagnostic apparatus irradiates X-rays onto a subject placed on a bed while the subject has ingested a contrast agent, thereby photographing a target part of the subject. Since the contrast agent moves in the body of the subject in the direction of gravity, the subject changes the body position on the bed in order to wrap the contrast agent around the target part. For example, the subject rolls while the bed is in a horizontal state, or tilts the bed toward the head side to assume an inverse inclination posture. The inverse inclination posture includes both the prone position and the supine position.

[0003] In order to prevent the subject from falling off the bed in the inverse inclination posture, a handgrip is provided on the bed. The subject holds the inverse inclination posture by gripping the handgrip.

[0004] In order to enable the use of a handgrip according to the physique of the subject, a conventional handgrip has a shape parallel to the long axis direction of the top plate. Since the handgrip has a shape parallel to the long axis direction of the top plate, the subject can grip the handgrip at a position according to his or her physique.

[0005] However, in a conventional handgrip, when the subject assumes the inverse inclination posture, the handgrip becomes parallel to the component of the gravitational force acting on the subject in the falling direction (that is, the component parallel to the upper surface of the top plate among the gravitational forces). For this reason, it has been difficult for the subject to grip the handgrip with sufficient gripping force when assuming the inverse inclination posture. When the subject's grip strength weakens due to old age or the like, it has become more difficult to grip the handgrip.

[0006] Therefore, an X-ray diagnostic apparatus is required to enable a subject to easily and appropriately grip a handgrip according to the physique of the subject.

Prior Art Documents

Patent Documents

[0007]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0008] One of the problems to be solved by the embodiments disclosed in this specification and the drawings is to enable a subject to easily and appropriately grip a handgrip according to the physique of the subject. However, the problems to be solved by the embodiments disclosed in this specification and the drawings are not limited to the above problems. The problems corresponding to the respective effects of each configuration shown in the embodiments described later can also be positioned as other problems.

Means for Solving the Problems

[0009] The X-ray diagnostic apparatus according to the embodiment includes a handgrip and a locking mechanism. The handgrip is connected to the top plate and is gripped by the subject on the top plate. The handgrip protrudes in a direction orthogonal to the top plate and is movable in the major axis direction of the top plate. The locking mechanism restricts the movement of the handgrip.

Brief Description of the Drawings

[0010]

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DETAILED DESCRIPTION OF THE INVENTION

[0011] Hereinafter, embodiments of the X-ray diagnostic apparatus will be described with reference to the drawings. In the following description, components having substantially the same functions and configurations will be denoted by the same reference numerals, and duplicate explanations will be made only when necessary.

[0012] (First Embodiment) FIG. 1 is a block diagram showing an example of the configuration of an X-ray diagnostic apparatus 1 according to the first embodiment. As shown in FIG. 1, the X-ray diagnostic apparatus 1 according to the first embodiment includes an imaging device 2 and a console device 3. The imaging device 2 is arranged in the imaging room. The console device 3 is arranged in the operation room. The operation room is separated from the imaging room by glass or the like. The operator operates the imaging device 2 via the console device 3.

[0013] The imaging device 2 includes an X-ray irradiator 21, an X-ray detector 22, an X-ray high voltage device 23, a bed device 24, a support arm 25, and a first rotation support portion 26. The imaging device 2 further includes a hand grip 27, a guide rail 28, a lock mechanism 29, an unlocking mechanism 210, and a movement control spring 220. The movement control spring 220 is an example of a movement control mechanism and an elastic member. The console device 3 includes an input interface 31, an output interface 32, a storage circuit 33, and a processing circuit 34. In the following description, the horizontal direction along the longitudinal direction of the bed device 24 is defined as the Y-axis direction, the vertical direction is defined as the Z-axis direction, and the direction orthogonal to the Y-axis direction and the Z-axis direction is defined as the X-axis direction.

[0014] The X-ray irradiator 21 is configured to generate X-rays. Specifically, the X-ray irradiator 21 includes an X-ray tube 211 that irradiates an object with X-rays, and an X-ray aperture 212 for restricting the irradiation range of the X-rays irradiated from the X-ray tube 211 to the object.

[0015] The X-ray tube 211 is a vacuum tube that generates X-rays by irradiating thermoelectrons from a cathode (filament) toward an anode (target) by applying a high voltage from the X-ray high voltage device 23 and supplying a filament current. In the X-ray tube 211, X-rays are generated when the thermoelectrons collide with the target. The X-ray tube 211 includes, for example, a rotating anode type X-ray tube that generates X-rays by irradiating thermoelectrons to a rotating anode. The type of the X-ray tube 211 is not limited to the rotating anode type, and any type can be applied.

[0016] The X-ray aperture 212 is provided in front of the X-ray emission window in the X-ray tube 211. The X-ray aperture 212 has, for example, four aperture vanes made of a metal plate such as lead. The aperture vanes are driven by a drive unit (not shown) according to the region of interest input by the operator via the input interface 31. The X-ray aperture 212 adjusts the size of the region where the X-ray is shielded to an arbitrary size by sliding the aperture vanes by the drive unit. With the adjusted aperture vanes, the X-ray aperture 212 shields the X-rays outside the opening region. Thereby, the X-ray aperture 212 narrows down the X-rays generated by the X-ray tube 211 so as to irradiate the region of interest of the subject.

[0017] The X-ray detector 22 detects the X-rays generated by the X-ray tube 211 and transmitted through the subject. The X-ray detector 22 is, for example, an X-ray flat panel detector (hereinafter referred to as FPD). The FPD has, for example, a plurality of semiconductor detection elements. The semiconductor detection elements include a direct conversion type that directly converts X-rays into electrical signals and an indirect conversion type that converts X-rays into light with a phosphor and then converts the light into electrical signals. Any type may be used for the FPD. The electrical signals generated by the plurality of semiconductor detection elements upon the incidence of X-rays are output to an analog-to-digital converter (hereinafter referred to as A / D converter) (not shown). The A / D converter converts the electrical signals into digital data. The A / D converter outputs the digital data to the processing circuit 34. Note that an image intensifier may be used as the X-ray detector 22.

[0018] The X-ray irradiator 21 is supported by the first rotation support portion 26 via the support arm 25. The X-ray irradiator 21 is rotatably supported about the rotation axis of the first rotation support portion 26. The first rotation support portion 26 is rotationally driven by an actuator such as a motor, for example, to rotate the X-ray irradiator 21. By rotating the X-ray irradiator 21 via the first rotation support portion 26, the incident angle of the X-rays irradiated from the X-ray irradiator 21 to the subject is adjusted. Further, the X-ray irradiator 21 may be connected to the support arm 25 so as to be capable of a pivoting motion (a nodding motion) so that the incident angle of the X-rays can be adjusted without accompanying the rotational motion by the first rotation support portion 26.

[0019] The X-ray high voltage device 23 includes an electric circuit such as a transformer and a rectifier, a high voltage generator, and an X-ray control device. The high voltage generator has a function of generating a high voltage applied to the X-ray tube 211 and a filament current supplied to the X-ray tube 211. The X-ray control device controls the output voltage according to the X-rays irradiated by the X-ray tube 211. The high voltage generator may be of a transformer type or an inverter type.

[0020] The bed device 24 includes a top plate 241 and a bed body 242. The top plate 241 is a flat plate member supported by the bed body 242 and on which the subject can be placed. The bed body 242 is rotatably supported about the rotation axis of the first rotation support portion 26. By rotating the bed body 242 via the first rotation support portion 26, the angle of the major axis direction of the top plate 241 with respect to the horizontal plane is adjusted. For example, the top plate 241 can be in an upright state having an angle of approximately 90° with respect to the horizontal plane such that the feet of the subject are downward in accordance with the rotation of the bed body 242. Further, the top plate 241 can be in a horizontal state parallel to the horizontal plane in accordance with the rotation of the bed body 242. Further, the top plate 241 can be in an inverted inclined state inclined with respect to the horizontal plane such that the head of the subject is downward in accordance with the rotation of the bed body 242. When the top plate 241 is in the inverted inclined state, the subject on the top plate 241 can take an inverted inclined posture.

[0021] In order to prevent the subject from falling off the top plate 241 in the upright state of the top plate 241, a footrest 243 is connected to one end of the top plate 241 in one direction in the long axis direction of the top plate 241. The subject can maintain their body posture on the top plate 241 by getting on the footrest 243 in the upright state of the top plate 241.

[0022] In order to prevent the subject from falling off the top plate 241 in the reverse inclination state of the top plate 241, a handgrip 27 is provided on the top plate 241. The handgrip 27 is connected to the top plate 241 and is gripped by the subject on the top plate 241. The handgrip 27 protrudes in a direction orthogonal to the top plate 241 (the Z direction in FIG. 1). The handgrip 27 is movable in the long axis direction of the top plate 241.

[0023] FIG. 2 is a perspective view showing the handgrip 27 in the X-ray diagnostic apparatus 1 according to the first embodiment. In the example shown in FIG. 2, the handgrip 27 has a gripping portion 271 and a connecting portion 272. The gripping portion 271 has a rod shape extending in a direction orthogonal to the top plate 241 and is the portion gripped by the subject on the top plate 241. The connecting portion 272 is provided at the lower end of the gripping portion 271 and connects the gripping portion 271 to the top plate 241 so as to be movable in the long axis direction of the top plate 241. Specifically, the connecting portion 272 is slidable along a guide rail 28 provided on the top plate 241 and parallel to the long axis direction of the top plate 241. In order for the connecting portion 272 not to deviate from the guide rail 28, the connecting portion 272 may be sandwiched between, for example, a pressing plate (not shown) provided outside the guide rail 28 in the X-axis direction and the guide rail 28.

[0024] The locking mechanism 29 restricts the movement of the handgrip 27. Specifically, the locking mechanism 29 allows the handgrip 27 to move in one direction in the long axis direction of the top plate 241. In the example shown in FIG. 2, one direction in the long axis direction of the top plate 241 is the direction toward one end of the top plate 241 where the footrest 243 is provided. Also, the locking mechanism 29 restricts the movement of the handgrip 27 in the other direction in the long axis direction.

[0025] FIG. 3 is a side view showing a hand grip 27, a lock mechanism 29, and an unlocking mechanism 210 in the X-ray diagnostic apparatus 1 according to the first embodiment. More specifically, as shown in FIG. 3, the lock mechanism 29 has a plurality of protrusions 291 spaced apart in the major axis direction of the top plate 241 so as to protrude within the movement range of the hand grip 27. In the example shown in FIG. 3, the protrusion 291 has a right-angled triangular shape when viewed from the X-axis direction. The plurality of protrusions 291 each have a first contact surface 291a and a second contact surface 291b connected to the first contact surface 291a. The hand grip 27 contacts the first contact surface 291a when the hand grip 27 moves in one direction (the +Y direction in FIG. 3) in the major axis direction of the top plate 241. The hand grip 27 contacts the second contact surface 291b when the hand grip 27 moves in the other direction (the -Y direction in FIG. 3) in the major axis direction of the top plate 241.

[0026] The protrusion 291 allows the hand grip 27 to move in one direction in the major axis direction of the top plate 241 when the hand grip 27 contacts the first contact surface 291a. Further, the protrusion 291 prevents the hand grip 27 from moving in the other direction in the major axis direction of the top plate 241 when the hand grip 27 contacts the second contact surface 291b.

[0027] The first contact surface 291a is an inclined surface inclined in one direction in the major axis direction of the top plate 241 with respect to the direction orthogonal to the top plate 241. The second contact surface 291b is parallel to the direction orthogonal to the top plate 241.

[0028] FIG. 4 is an explanatory diagram for explaining the movement range of the lock mechanism 29 in the locked state in the X-ray diagnostic apparatus 1 according to the first embodiment. In the examples shown in FIGS. 3 and 4, the protrusion 291 rotates in one direction in the major axis direction of the top plate 241 by the pressing force received when the handgrip 27 contacts the first contact surface 291a, thereby allowing the handgrip 27 to move in one direction in the major axis direction of the top plate 241. Further, the protrusion 291 resists the rotation in the other direction in the major axis direction of the top plate 241 against the pressing force received when the handgrip 27 contacts the second contact surface 291b, thereby preventing the handgrip 27 from moving in the other direction in the major axis direction of the top plate 241.

[0029] More specifically, in the example shown in FIG. 4, the lock mechanism 29 further includes a support plate 292, a second rotation support portion 293, and a compression spring 294 in addition to the protrusion 291. The support plate 292 has a plate shape along the upper surface of the top plate 241 and supports the protrusion 291. The second rotation support portion 293 rotatably supports the protrusion 291 on the support plate 292 about the rotation axis in the X-axis direction. The compression spring 294 is provided between the second contact surface 291b and the support plate 292. In such a configuration of the lock mechanism 29, when the handgrip 27 contacts the first contact surface 291a, as shown by the arrow A and the two-dot chain line in FIG. 4, the protrusion 291 rotates in one direction in the major axis direction of the top plate 241 from the initial position against the elastic force of the compression spring 294 by the pressing force received from the handgrip 27. Thereby, the protrusion 291 allows the handgrip 27 to move in one direction in the major axis direction of the top plate 241. When the handgrip 27 passes over the protrusion 291 and the handgrip 27 no longer contacts the first contact surface 291a, the protrusion 291 returns to the initial position before rotation by the elastic force of the compression spring 294. On the other hand, even when the handgrip 27 contacts the second contact surface 291b and the protrusion 291 receives a pressing force from the handgrip 27, the protrusion 291 is prevented from rotating in the other direction in the major axis direction by the vertical resistance received from the upper surface of the support plate 292. Thereby, the protrusion 291 prevents the handgrip 27 from moving in the other direction in the major axis direction of the top plate 241.

[0030] The unlocking mechanism 210 accepts the release of the movement restriction of the handgrip 27 by the locking mechanism 29.

[0031] When the unlocking of the movement restriction is accepted by the unlocking mechanism 210, the protruding portion 291 allows the handgrip 27 to move in both directions in the major axis direction of the top plate 241 by retracting outside the movement range of the handgrip 27.

[0032] In the examples shown in FIGS. 1 and 3, the unlocking mechanism 210 includes an unlocking switch 201 and a driving unit 202. The unlocking switch 201 is provided at a position on the side surface 241a of the top plate 241 that is away from the handgrip 27. The unlocking switch 201 is provided at a separation distance from the handgrip 27 such that the hand of the subject on the top plate 241 cannot reach it. The unlocking switch 201 is, for example, a button-type switch that accepts a pressing operation for instructing the release of the movement restriction of the handgrip 27 by the locking mechanism 29. The driving unit 202 electrically drives the locking mechanism 29 to release the movement restriction of the handgrip 27 in response to the pressing operation of the unlocking switch 201. FIG. 5 is an explanatory diagram for explaining the movement range of the locking mechanism 29 when unlocking in the X-ray diagnostic apparatus 1 according to the first embodiment. In the examples shown in FIGS. 4 and 5, the driving unit 202 includes a third rotation support portion 203, a gear 204, a motor 205, and a drive circuit 206. The third rotation support portion 203 supports the support plate 292 so as to be rotatable about the rotation axis in the X-axis direction. The motor 205 generates a driving force for rotating the support plate 292. The gear 204 transmits the driving force of the motor 205 to the support plate 292. The drive circuit 206 drives the motor 205 in response to the pressing operation of the unlocking switch 201. In such a configuration, when the unlocking switch 201 is pressed, the drive circuit 206 drives the motor 205. When the motor 205 is driven, the driving force of the motor 205 is transmitted to the support plate 292 via the gear 204. When the driving force of the motor 205 is transmitted to the support plate 292, as shown by the arrow A and the two-dot chain line in FIG. 5, the support plate 292 rotates until the first contact surface 291a becomes parallel to the Y-axis direction. As a result, when the unlocking switch 201 is pressed, the protrusion 291 can retract outside the movement range of the handgrip 27. By retracting outside the movement range of the handgrip 27, the protrusion 291 can release the movement restriction of the handgrip 27.

[0033] When the movement restriction of the hand grip 27 is released by the unlocking mechanism 210, the movement control spring 220 moves the hand grip 27 to the initial position by the elastic force.

[0034] The input interface 31 shown in FIG. 1 receives input operations of various instructions and information from the operator. Specifically, the input interface 31 converts the input operation received from the operator into an electrical signal and outputs it to the processing circuit 34. For example, the input interface 31 is realized by a trackball, a switch button, a mouse, a keyboard, a touch pad that performs an input operation by touching the operation surface, a touch screen in which the display screen and the touch pad are integrated, a non-contact input circuit using an optical sensor, and a voice input circuit, etc. Note that the input interface 31 is not limited to those provided with physical operation components such as a mouse and a keyboard. For example, a processing circuit for electrical signals that receives an electrical signal corresponding to an input operation from an external input device provided separately from the apparatus and outputs this electrical signal to the control circuit is also included in the examples of the input interface 31.

[0035] The output interface 32 outputs various kinds of information. For example, the output interface 32 includes a display. The display converts the information and image data sent from the processing circuit 34 into an electrical signal for display and outputs it. The display is realized by a liquid crystal monitor, a CRT (Cathode Ray Tube) monitor, a touch panel, etc. The output interface 32 may include a speaker.

[0036] The memory circuit 33 is a non-volatile memory device that stores various information, such as an HDD (Hard Disk Drive), an optical disk, an SSD (Solid State Drive), and an integrated circuit memory device. The memory circuit 33 stores, for example, a control program for controlling the X-ray diagnostic apparatus 1 and various data used for the execution of this control program. In addition to HDDs and SSDs, etc., the memory circuit 33 may also be a drive device that reads and writes various information to and from portable storage media such as CDs (Compact Discs), DVDs (Digital Versatile Discs), and flash memories, or semiconductor memory elements such as RAMs (Random Access Memories).

[0037] The processing circuit 34 is a circuit that controls the operation of the entire X-ray diagnostic apparatus 1 in response to an electrical signal of an input operation input from the input interface 31. For example, the processing circuit 34 includes an imaging control function 341.

[0038] Here, for example, the processing function executed by the imaging control function 341, which is a component of the processing circuit 34 shown in FIG. 1, is recorded in the memory circuit 33 in the form of a program executable by a computer. The processing circuit 34 is, for example, a processor. The processor constituting the processing circuit 34 reads out a program from the memory circuit 33 and executes it to realize a function corresponding to the read program. In other words, the processing circuit 34 in the state of having read the program has the functions shown in the processing circuit 34 of FIG. 1.

[0039] Note that in FIG. 1, the case where the processing function of the imaging control function 341 is realized by a single processing circuit 34 is shown, but the embodiment is not limited to this. For example, the processing circuit 34 may be configured by combining a plurality of independent processors, and each processor may execute each program to realize the processing function of the imaging control function 341. Also, the processing functions of the processing circuit 34 may be appropriately distributed or integrated into single or a plurality of processing circuits and realized.

[0040] The imaging control function 341 controls the imaging operation of the subject by the imaging device 2 based on, for example, an input operation received from an operator via the input interface 31. The imaging control function 341 controls the imaging operation of the subject by controlling the X-ray irradiator 21, the X-ray high voltage device 23, the drive unit of the X-ray aperture 212, the first rotation support unit 26, and the like. More specifically, the imaging control function 341 reads out the control program stored in the storage circuit 33 and expands it onto the memory in the processing circuit 34, and controls each part of the X-ray diagnostic apparatus 1 according to the expanded control program. Further, the imaging control function 341 generates image data based on the output from the X-ray detector 22. The image data is data of medical images including fluoroscopic images and radiographic images of the subject. The imaging control function 341 causes the generated image data to be displayed on the output interface 32.

[0041] Next, an operation example of the X-ray diagnostic apparatus 1 according to the first embodiment configured as described above will be described. FIG. 6 is a side view showing an operation example of the X-ray diagnostic apparatus 1 according to the first embodiment. First, as shown in FIG. 6, in the upright state of the top plate 241, the subject P gets on the footrest 243. In the upright state shown in FIG. 6, the handgrip 27 is located at the initial position. Further, in the example shown in FIG. 6, the handgrip 27 at the initial position is located above the palm of the subject P. Further, in the upright state shown in FIG. 6, the lock mechanism 29 is in a locked state that restricts the movement of the handgrip 27.

[0042] FIG. 7 is a side view showing an operation example of the X-ray diagnostic apparatus 1 according to the first embodiment, following FIG. 6. After the subject P gets on the footrest 243, as shown in FIG. 7, the subject P adjusts the position of the handgrip 27 according to the physique of the subject P while gripping the gripping portion 271 of the handgrip 27 in accordance with the instruction of the operator. In the example shown in FIG. 7, the subject P adjusts the position of the handgrip 27 by moving the handgrip 27 downward as indicated by the arrow B. In the upright state of the top plate 241, the downward direction corresponds to one direction in the major axis direction of the top plate 241. When the handgrip 27 is moved downward, the handgrip 27 contacts the first contact surface 291a of the protrusion 291 via the connecting portion 272. The protrusion 291 rotates downward by the pressing force received when the handgrip 27 contacts the first contact surface 291a. In the example shown in FIG. 4, the protrusion 291 rotates downward about the rotation axis of the second rotation support portion 293 against the elastic force of the compression spring 294. When the protrusion 291 rotates downward, the downward movement of the handgrip 27 is allowed in the locked state of the lock mechanism 29. Since the downward movement of the handgrip 27 is allowed, the subject P can easily and appropriately adjust the position of the handgrip 27 according to the physique of the subject P. After adjusting the position of the handgrip 27, the subject P drinks the contrast agent in accordance with the instruction of the operator in the upright state of the top plate 241 or in a state where the top plate 241 is slightly tilted.

[0043] FIG. 8 is a side view showing an operation example of the X-ray diagnostic apparatus 1 according to the first embodiment, following FIG. 7. After the subject P drinks the contrast agent, the imaging device 2 starts imaging the subject P under the control of the imaging control function 341 in response to an input operation of the operator received by the input interface 31. The first rotation support portion 26 rotates the top plate 241 to the rotation position designated by the input operation under the control of the imaging control function 341. The subject P assumes a posture suitable for imaging on the top plate 241 according to the instruction of the operator. As shown in FIG. 8, when the subject P assumes an inverted inclined posture by inversely inclining the top plate 241 so that the head side of the subject P is downward, the subject P grips the handgrip 27 according to the instruction of the operator. When the top plate 241 is inversely inclined, the handgrip 27 extends in a direction orthogonal to the falling direction component of the gravity acting on the subject P (that is, the component of the gravity parallel to the upper surface of the top plate 241). Therefore, the subject P can easily grip the handgrip 27 with sufficient gripping force. Thereby, the subject P can simply maintain the inverted inclined posture.

[0044] FIG. 9 is a side view showing an operation example of the X-ray diagnostic apparatus 1 according to the first embodiment, following FIG. 8. When the top plate 241 is reversely inclined, as shown in FIG. 9, the hand grip 27 contacts the second contact surface 291b of the protrusion 291 via the connection portion 272. The protrusion 291 does not rotate in the direction indicated by arrow C against the pressing force received when the hand grip 27 contacts the second contact surface 291b. The direction indicated by arrow C corresponds to the other direction in the major axis direction of the top plate 241. In the example shown in FIG. 4, the protrusion 291 abuts against the upper surface of the support plate 292, and thus receives a vertical resistance force from the upper surface of the support plate 292. By receiving the vertical resistance force from the upper surface of the support plate 292, the protrusion 291 is prevented from rotating in the direction indicated by arrow C in FIG. 9. Since the support plate 292 does not rotate in the direction indicated by arrow C, the movement of the hand grip 27 in the direction indicated by arrow C is prevented. That is, the locking mechanism 29 in the locked state prevents movement in the other direction in the major axis direction of the top plate 241. Thereby, it is possible to prevent the hand grip 27 from moving in the falling direction due to the weight of the subject P, so that the subject P can stably maintain the reversely inclined body posture.

[0045] FIG. 10 is a side view showing an operation example of the X-ray diagnostic apparatus 1 according to the first embodiment, following FIG. 9. After the imaging of the subject P is completed and the subject P gets off the top plate 241, as shown in FIG. 10, the operator O presses down the unlock switch 201 to instruct the release of the locked state of the locking mechanism 29.

[0046] FIG. 11 is a side view showing an operation example of the X-ray diagnostic apparatus 1 according to the first embodiment, following FIG. 10. When the unlock switch 201 is depressed, the drive unit 202 rotates the protrusion 291 until the first contact surface 291a becomes parallel to the upper surface of the top plate 241 so that the protrusion 291 retracts outside the movement range of the handgrip 27. In the example shown in FIG. 5, the drive circuit 206 drives the motor 205 in response to the depression operation of the unlock switch 201. The driving force of the motor 205 is transmitted to the support plate 292 via the gear 204. The support plate 292 rotates in the direction indicated by the arrow A in FIG. 5 about the rotation axis of the third rotation support portion 203 by the transmitted driving force of the motor 205. As the support plate 292 rotates, the protrusion 291 supported on the support plate 292 also rotates in the same direction as the support plate 292. Thereby, the protrusion 291 is rotated until the first contact surface 291a becomes parallel to the upper surface of the top plate 241, and the lock mechanism 29 is in an unlocked state in which the movement restriction of the handgrip 27 is released. When the lock mechanism 29 is in the unlocked state, the handgrip 27 is allowed to move in both directions in the major axis direction of the top plate 241.

[0047] FIG. 12 is a side view showing an operation example of the X-ray diagnostic apparatus 1 according to the first embodiment, following FIG. 11. When the lock mechanism 29 is in the unlocked state with the subject P not gripping the handgrip 27, the elastic force (i.e., tensile force) of the movement control spring 220 mainly acts on the handgrip 27. Due to the elastic force of the movement control spring 220, the handgrip 27 moves in the direction indicated by the arrow D in FIG. 12 and returns to the initial position.

[0048] As described above, in the first embodiment, the handgrip 27 protrudes in a direction orthogonal to the top plate 241 and is movable in the major axis direction of the top plate 241. Further, the lock mechanism 29 restricts the movement of the handgrip 27.

[0049] As a result, the subject P can easily grip the handle grip 27 protruding in the direction orthogonal to the top plate 241 with sufficient gripping force. Also, by moving the handle grip 27 in the major axis direction of the top plate 241, the position of the handle grip 27 can be adjusted according to the physique of the subject P. Further, the position of the adjusted handle grip 27 can be held by the lock mechanism 29. Therefore, according to the first embodiment, the subject P can easily and appropriately grip the handle grip 27 according to the physique of the subject P.

[0050] Also, in the first embodiment, the unlocking mechanism 210 accepts the release of the movement restriction of the handle grip 27 by the lock mechanism 29.

[0051] As a result, the movement restriction of the handle grip 27 by the lock mechanism 29 can be released, so that the position of the handle grip 27 can be readjusted by the same subject P or the position of the handle grip 27 can be adjusted by a new subject P replaced with the inspected subject P.

[0052] Also, in the first embodiment, the lock mechanism 29 allows the handle grip 27 to move in one direction in the major axis direction of the top plate 241 and restricts the movement of the handle grip 27 in the other direction in the major axis direction of the top plate 241.

[0053] As a result, the position of the handle grip 27 can be appropriately adjusted in one direction in the major axis direction of the top plate 241, and the position of the handle grip 27 after the position adjustment can be suppressed from fluctuating in the other direction in the major axis direction of the top plate 241.

[0054] In the first embodiment, the locking mechanism 29 includes a plurality of protrusions 291 that are spaced apart in the longitudinal direction of the top plate 241 so as to protrude within the movement range of the handgrip 27. The plurality of protrusions 291 each have a first contact surface 291a and a second contact surface 291b. The handgrip 27 contacts the first contact surface 291a when the handgrip 27 moves in one direction in the longitudinal direction of the top plate 241. The handgrip 27 contacts the second contact surface 291b when the handgrip 27 moves in the other direction in the longitudinal direction of the top plate 241. When the handgrip 27 contacts the first contact surface 291a, the protrusion 291 allows the handgrip 27 to move in one direction in the longitudinal direction of the top plate 241. Also, when the handgrip 27 contacts the second contact surface 291b, the protrusion 291 prevents the handgrip 27 from moving in the other direction in the longitudinal direction of the top plate 241.

[0055] Thereby, with a simple configuration, it is possible to allow the handgrip 27 to move in one direction in the longitudinal direction of the top plate 241 and to prevent the handgrip 27 from moving in the other direction in the longitudinal direction of the top plate 241.

[0056] In the first embodiment, the first contact surface 291a is an inclined surface inclined in one direction in the longitudinal direction of the top plate 241 with respect to the direction orthogonal to the top plate 241. Also, the second contact surface 291b is parallel to the direction orthogonal to the top plate 241.

[0057] Thereby, with a simpler configuration, it is possible to allow the handgrip 27 to move in one direction in the longitudinal direction of the top plate 241 and to prevent the handgrip 27 from moving in the other direction in the longitudinal direction of the top plate 241.

[0058] Also, in the first embodiment, when the handle grip 27 contacts the first contact surface 291a, the protruding portion 291 rotates in one direction in the major axis direction of the top plate 241 due to the pressing force received, thereby allowing the handle grip 27 to move in one direction in the major axis direction of the top plate 241. Further, when the handle grip 27 contacts the second contact surface 291b, the protruding portion 291 does not rotate in the other direction in the major axis direction of the top plate 241 against the pressing force received, thereby preventing the handle grip 27 from moving in the other direction in the major axis direction of the top plate 241.

[0059] Thereby, it is possible to more appropriately allow the handle grip 27 to move in one direction in the major axis direction of the top plate 241 and prevent the handle grip 27 from moving in the other direction in the major axis direction of the top plate 241.

[0060] Also, in the first embodiment, when the movement restriction of the protruding portion 291 is released by the unlocking mechanism 210, the protruding portion 291 retracts outside the movement range of the handle grip 27, thereby allowing the handle grip 27 to move in both directions in the major axis direction of the top plate 241.

[0061] Thereby, with a simple configuration, the movement restriction of the handle grip 27 by the locking mechanism 29 can be released.

[0062] Also, in the first embodiment, the unlocking mechanism 210 includes an unlocking switch 201 provided at a position on the side surface 241a of the top plate 241 away from the handle grip 27.

[0063] Thereby, with a simple configuration, the movement restriction of the handle grip 27 by the locking mechanism 29 can be released, and malfunction of the unlocking mechanism 210 by the test object P can be suppressed.

[0064] Also, in the first embodiment, when the movement restriction of the handle grip 27 is released by the unlocking mechanism 210, the movement control spring 220 moves the handle grip 27 to the initial position by the elastic force.

[0065] As a result, the elastic force can return the handgrip 27 after unlocking to the initial position. Therefore, with a simple configuration, the operation of returning the handgrip 27 to the initial position when replacing the subject P can be omitted.

[0066] (First Modification Example) Next, a first modification example of the first embodiment in which the console device 3 is provided with an unlocking switch will be described centering on the differences from the above-described embodiment.

[0067] FIG. 13 is a block diagram showing the configuration of the X-ray diagnostic apparatus 1 according to the first modification example of the first embodiment. FIG. 14 is a side view showing the operation of the X-ray diagnostic apparatus 1 according to the first modification example of the first embodiment.

[0068] In FIG. 3, an example of the X-ray diagnostic apparatus 1 in which the unlocking switch 201 is provided at a position away from the handgrip 27 on the side surface 241a of the top plate 241 has been described. In the example shown in FIG. 13, the X-ray diagnostic apparatus 1 further includes an unlocking switch 311 provided in the console device 3. The unlocking switch 311 is an example of a second unlocking switch. In the example shown in FIG. 13, the unlocking switch 311 is included in the input interface 31.

[0069] According to the X-ray diagnostic apparatus 1 having such a configuration, as shown in FIG. 14, the operator O can press the unlocking switch 311 in the operation room separated from the imaging room to release the locked state of the locking mechanism 29.

[0070] Therefore, according to the examples shown in FIGS. 13 and 14, exposure of the operator O can be suppressed. In addition, by providing the unlocking switches 201 and 311 at a plurality of locations, the labor of movement of the operator O can be reduced and the convenience can be improved.

[0071] (Second Modification Example) Next, regarding the second modification of the first embodiment further including the second handgrip 230, the differences from the above-described embodiments will be mainly described.

[0072] FIG. 15 is a side view showing the handgrips 27 and 230, the lock mechanism 29, and the unlocking mechanism 210 in the X-ray diagnostic apparatus 1 according to the second modification of the first embodiment. In the example shown in FIG. 15, in addition to the configuration shown in FIG. 3, the X-ray diagnostic apparatus 1 further includes a second handgrip 230.

[0073] The second handgrip 230 has a substantially rectangular shape when viewed from the direction (X-axis direction in FIG. 15) orthogonal to both the major axis direction of the top plate 241 and the direction orthogonal to the upper surface of the top plate 241. Specifically, the second handgrip 230 has a shape with one side of the rectangle missing. More specifically, the second handgrip 230 includes a first portion 230a extending in the major axis direction of the top plate 241, a second portion 230b extending from one end of the first portion 230a to the top plate 241 along the direction (Z-axis direction) orthogonal to the upper surface of the top plate 241, and a third portion 230c extending from the other end of the first portion 230a to the top plate 241 along the direction orthogonal to the upper surface of the top plate 241.

[0074] The second handgrip 230 is connected to the top plate 241 and the end of the handgrip 27. In the example shown in FIG. 15, the upper end portion of the handgrip 27 is slidably connected to the first portion 230a of the second handgrip 230.

[0075] As shown by the two-dot chain line in FIG. 15, the handgrip 27 is movable in the major axis direction of the top plate 241 within the range surrounded by the second portion 230b and the third portion 230c of the second handgrip 230.

[0076] According to the example shown in FIG. 15, the options for the position where the subject P holds the handgrips 27 and 230 can be increased, so that the convenience can be improved.

[0077] (Third Modification) Next, a third modification of the first embodiment in which the handgrip 27 has a substantially triangular shape will be described centering on the differences from the above-described embodiments.

[0078] FIG. 16 is a side view showing the handgrip 27, the lock mechanism 29, and the unlocking mechanism 210 in the X-ray diagnostic apparatus 1 according to the third modification of the first embodiment. In the example shown in FIG. 16, the handgrip 27 has a substantially triangular shape when viewed from the direction (X-axis direction in FIG. 16) orthogonal to both the major axis direction of the top plate 241 and the direction orthogonal to the upper surface of the top plate 241. Specifically, the handgrip 27 has a shape in which one side of the triangular shape is missing (that is, a V-shaped).

[0079] FIG. 17 is a side view showing the operation of the X-ray diagnostic apparatus 1 according to the third modification of the first embodiment. When the subject P changes its body position to a prone position, a supine position, etc. with respect to the top plate 241, the position and angle at which the subject P can easily grip the handgrip 27 may change. According to the examples shown in FIGS. 16 and 17, since the handgrip 27 has a substantially triangular shape, the subject P can grip the handgrip 27 at a position and angle that are easy to grip after the body position change without adjusting the position of the handgrip 27.

[0080] Therefore, according to the examples shown in FIGS. 16 and 17, the subject P can easily and appropriately grip the handgrip 27 in accordance with the body position change of the subject P.

[0081] (Fourth Modification) Next, a fourth modification of the first embodiment in which the handgrip 27 having a substantially triangular shape is combined with the second handgrip 230 will be described centering on the differences from the above-described embodiments.

[0082] FIG. 18 is a side view showing a handgrip 27, 230, a lock mechanism 29, and an unlocking mechanism 210 in the X-ray diagnostic apparatus 1 according to the fourth modification of the first embodiment. In the example shown in FIG. 18, in addition to the configuration shown in FIG. 16, the X-ray diagnostic apparatus 1 further includes a second handgrip 230. The configuration of the second handgrip 230 is the same as that in FIG. 15. The upper end portion of the handgrip 27 having a substantially triangular shape is slidably connected to the first portion 230a of the second handgrip 230.

[0083] FIG. 19 is a side view showing the operation of the X-ray diagnostic apparatus 1 according to the fourth modification of the first embodiment. According to the example shown in FIG. 19, since the options for the position where the subject P grips the handgrips 27, 230 can be increased with respect to FIG. 17, the convenience can be improved.

[0084] (The fifth modification) Next, as a fifth modification of the first embodiment, a modification of the unlocking mechanism 210 will be described. FIG. 20 is a side view showing the lock mechanism 29 and the unlocking mechanism 210 in the X-ray diagnostic apparatus 1 according to the fifth modification of the first embodiment. In FIG. 5, an example of the unlocking mechanism 210 for releasing the locked state of the lock mechanism 29 by rotating the protrusion 291 beyond the movement range of the handgrip 27 has been described. On the other hand, in the example shown in FIG. 20, the unlocking mechanism 210 releases the locked state of the lock mechanism 29 by linearly moving the protrusion 291 beyond the movement range of the handgrip 27. In the example shown in FIG. 20, the unlocking mechanism 210 has a rack gear 207 that converts the rotational motion of the motor 205 into the translational motion of the support plate 292 in the Z-axis direction.

[0085] According to the example shown in FIG. 20, the degree of freedom in the design of the unlocking mechanism 210 can be improved.

[0086] (The second embodiment) Next, a second embodiment in which the locking mechanism 29 restricts the movement of the handgrip 27 in both directions in the major axis direction of the top plate 241 will be described, centering on the differences from the above-described embodiments. FIG. 21 is a side view showing the handgrip 27, the locking mechanism 29, and the unlocking mechanism 210 in the X-ray diagnostic apparatus 1 according to the second embodiment. In the above-described embodiment, an example of the locking mechanism 29 that restricts the movement of the handgrip 27 in one direction in the major axis direction of the top plate 241 has been described. In contrast, in the example shown in FIG. 21, the locking mechanism is configured to restrict the movement of the handgrip 27 in both directions in the major axis direction of the top plate 241.

[0087] Specifically, in the example shown in FIG. 21, the X-ray diagnostic apparatus 1 includes an electromagnetic brake 240 which is an example of the locking mechanism. Also, in the example shown in FIG. 21, the drive unit 202 is composed of a drive circuit that drives the electromagnetic brake 240. The electromagnetic brake 240 is driven, for example, by power being supplied from the drive unit 202, and generates an electromagnetic force that attracts the connecting portion 272 of the handgrip 27. The connecting portion 272 of the handgrip 27 is made of a magnetic material so that the electromagnetic force of the electromagnetic brake 240 acts appropriately. By generating the electromagnetic force, the electromagnetic brake 240 is in a locked state in which it attracts the handgrip 27. In the locked state, the movement of the handgrip 27 in both directions in the major axis direction of the top plate 241 is prevented.

[0088] An operation switch 250 for receiving an input operation for setting the electromagnetic brake 240 in the locked state or the unlocked state is connected to the drive unit 202. By the operator operating the operation switch 250, the presence or absence of power supply from the drive unit 202 to the electromagnetic brake 240 is controlled.

[0089] FIG. 22 is a side view showing an operation example of the X-ray diagnostic apparatus 1 according to the second embodiment. As shown in FIG. 22, when the operator O performs a locking operation of pressing down the operation switch 250 in the unlocked state of the electromagnetic brake 240, power is supplied from the drive unit 202 to the electromagnetic brake 240. By supplying power, the electromagnetic brake 240 generates an electromagnetic force that attracts the handgrip 27 as shown by the arrow E. When the handgrip 27 is attracted to the electromagnetic brake 240 by the electromagnetic force, the handgrip 27 is prevented from moving in both directions in the major axis direction of the top plate 241 shown by the arrow F.

[0090] FIG. 23 is a side view showing an operation example of the X-ray diagnostic apparatus 1 according to the second embodiment following FIG. 22. As shown in FIG. 23, when the operator O performs an unlocking operation of pressing down the operation switch 250 in the locked state of the electromagnetic brake 240, the supply of power from the drive unit 202 to the electromagnetic brake 240 is stopped. In this case, the operation switch 250 functions as an unlocking mechanism. By stopping the supply of power, the electromagnetic brake 240 stops the electromagnetic force that attracts the handgrip 27. By stopping the electromagnetic force, the handgrip 27 is allowed to move in both directions in the major axis direction of the top plate 241 shown by the arrow G.

[0091] Similar to the above-described embodiment, the X-ray diagnostic apparatus 1 has a movement control spring 220 that returns the handgrip 27 to the initial position when the electromagnetic brake 240 is in the unlocked state.

[0092] As described above, in the second embodiment, the locking mechanism 240 restricts the movement of the handgrip 27 in both directions in the major axis direction. Specifically, the locking mechanism includes an electromagnetic brake 240 that generates an electromagnetic force that attracts the handgrip 27 in a direction orthogonal to the top plate 241.

[0093] Thereby, similar to the first embodiment, the subject P can easily and appropriately grip the handgrip 27 according to the build of the subject P.

[0094] Further, in the second embodiment, when the electromagnetic brake 240 receives the release of the movement restriction by the operation switch 250 (i.e., the unlocking mechanism), it stops the electromagnetic force to allow the movement of the handgrip 27 in both directions in the major axis direction of the top plate 241.

[0095] Thereby, the movement restriction of the handgrip 27 can be released with a simple configuration.

[0096] (First Modification Example) Next, a modification example of the second embodiment in which the handgrip 27 is returned to the initial position electrically when the movement restriction of the handgrip 27 is released will be described centering on the differences from the above-described embodiment. FIG. 24 is a side view showing the handgrip 27, the locking mechanism 240, and the unlocking mechanism 210 in the X-ray diagnostic apparatus 1 according to the modification example of the second embodiment.

[0097] In the above-described embodiment, an example of the X-ray diagnostic apparatus 1 in which the movement control mechanism is constituted by the movement control spring 220 has been described. In contrast, in the example shown in FIG. 24, the movement control mechanism is constituted by an electric actuator 221. The electric actuator 221 is driven by being supplied with power, and moves the handgrip 27 to the initial position in the driving state. The electric actuator 221 has, for example, a motor and a driving force transmission member such as a gear for transmitting the driving force of the motor to the handgrip 27. In the example shown in FIG. 24, the electric actuator 221 is driven by the driving unit 202. For example, when the unlocking operation is received by the operation switch 250, the driving unit 202 stops the generation of the electromagnetic force by the electromagnetic brake 240. After stopping the generation of the electromagnetic force, the driving unit 202 drives the electric actuator 221 to return the handgrip 27 to the initial position by the electric actuator 221. Note that the driving unit 202 may drive the electric actuator 221 to return the handgrip 27 to the initial position when an input operation for returning the handgrip 27 to the initial position is received by the operation switch 250.

[0098] According to the example shown in FIG. 24, in the released state of the electromagnetic brake 240, the hand grip 27 can be returned to the initial position electrically. Therefore, with a simple configuration, the operation of returning the hand grip 27 to the initial position when replacing the subject P can be omitted. Also, unlike the above-described embodiment in which the hand grip 27 returns to the initial position by the movement control spring 220 in the unlocked state of the lock mechanism 29, the position of the hand grip 27 can be adjusted any number of times in the unlocked state.

[0099] Note that the term "processor" used in the above description means, for example, a CPU (Central Processing Unit), a GPU (Graphics Processing Unit), or a circuit such as an application specific integrated circuit (ASIC), a programmable logic device (e.g., a simple programmable logic device (SPLD), a complex programmable logic device (CPLD), and a field programmable gate array (FPGA)). The processor realizes its function by reading and executing a program stored in the storage circuit. Instead of storing the program in the storage circuit, the program may be directly incorporated into the circuit of the processor. In this case, the processor realizes its function by reading and executing the program incorporated in the circuit. Note that the processor is not limited to being configured as a single processor circuit, and a plurality of independent circuits may be combined to be configured as one processor to realize its function. Further, a plurality of components in FIG. 1 may be integrated into one processor to realize its function.

[0100] According to at least one embodiment described above, it is possible to enable a subject to easily and appropriately grip the handgrip 27 according to the build of the subject.

[0101] As described above, several embodiments have been described, but these embodiments are presented only as examples and are not intended to limit the scope of the invention. The novel devices and methods described in this specification can be implemented in various other forms. Also, various omissions, substitutions, and changes can be made to the forms of the devices and methods described in this specification without departing from the gist of the invention. The appended claims and equivalents thereof are intended to include such forms and modifications within the scope and gist of the invention.

Explanation of Reference Numerals

[0102] 1 X-ray diagnostic apparatus 3 Console apparatus 27 Handgrip 29 Lock mechanism 201 Unlock switch 210 Unlock mechanism 220 Movement control spring 221 Electric actuator 230 Second handgrip 240 Electromagnetic brake 241 Top plate 242 Footrest 250 Operation switch 291 Protrusion 291a First contact surface 291b Second contact surface 311 Unlock switch

Claims

1. A handgrip connected to a top plate and gripped by a subject on the top plate, the handgrip protruding in a direction orthogonal to the top plate and movable in the major axis direction of the top plate; A locking mechanism for restricting the movement of the handgrip; An X-ray diagnostic apparatus comprising the above.

2. The X-ray diagnostic apparatus according to claim 1, further comprising an unlocking mechanism for receiving the release of the movement restriction of the handgrip by the locking mechanism.

3. The X-ray diagnostic apparatus according to claim 2, wherein the locking mechanism allows the handgrip to move in one direction in the major axis direction and restricts the handgrip from moving in the other direction in the major axis direction.

4. The locking mechanism is a plurality of protrusions spaced apart in the major axis direction so as to protrude within the movement range of the handgrip, and includes a first contact surface that the handgrip contacts when the handgrip moves in one direction in the major axis direction, and a second contact surface that the handgrip contacts when the handgrip moves in the other direction in the major axis direction. The locking mechanism comprises a plurality of protrusions each having the above; The X-ray diagnostic apparatus according to claim 3, wherein the protrusion allows the handgrip to move in one direction in the major axis direction when the handgrip contacts the first contact surface, and prevents the handgrip from moving in the other direction in the major axis direction when the handgrip contacts the second contact surface.

5. The X-ray diagnostic apparatus according to claim 4, wherein the first contact surface is an inclined surface inclined in one direction in the major axis direction with respect to the direction orthogonal to the top plate, and the second contact surface is parallel to the direction orthogonal to the top plate.

6. The X-ray diagnostic apparatus according to claim 4, wherein the protrusion rotates in one direction in the major axis direction by the pressing force received when the handgrip contacts the first contact surface, thereby allowing the handgrip to move in one direction in the major axis direction, and does not rotate in the other direction in the major axis direction against the pressing force received when the handgrip contacts the second contact surface, thereby preventing the handgrip from moving in the other direction in the major axis direction.

7. The X-ray diagnostic apparatus according to claim 4, wherein when the unlocking mechanism accepts the release of the movement restriction, the protruding portion retracts outside the movement range of the handgrip, thereby allowing the handgrip to move in both directions in the major axis direction.

8. The X-ray diagnostic apparatus according to claim 3, further comprising a footrest connected to the top plate at one end in the major axis direction.

9. The X-ray diagnostic apparatus according to claim 2, wherein the locking mechanism restricts the movement of the handgrip in both directions in the major axis direction.

10. The X-ray diagnostic apparatus according to claim 9, wherein the locking mechanism includes an electromagnetic brake that generates an electromagnetic force to attract the handgrip in a direction perpendicular to the top plate.

11. The X-ray diagnostic apparatus according to claim 10, wherein when the unlocking mechanism accepts the release of the movement restriction, the electromagnetic brake stops the electromagnetic force, thereby allowing the handgrip to move in both directions in the major axis direction.

12. The X-ray diagnostic apparatus according to claim 1, further comprising a second handgrip connected to the top plate and an end of the handgrip, and having a substantially rectangular shape when viewed from a direction perpendicular to the major axis direction and a direction perpendicular to the top plate.

13. The X-ray diagnostic apparatus according to claim 1, wherein the handgrip has a substantially triangular shape when viewed from a direction perpendicular to the major axis direction and a direction perpendicular to the top plate.

14. The X-ray diagnostic apparatus according to claim 2, wherein the unlocking mechanism includes an unlocking switch provided at a position on a side surface of the top plate away from the handgrip.

15. The X-ray diagnostic apparatus according to claim 2, wherein the unlocking mechanism includes a second unlocking switch provided on a console device.

16. The X-ray diagnostic apparatus according to claim 2, further comprising a movement control mechanism that moves the handgrip to an initial position when the movement restriction of the handgrip is released by the unlocking mechanism.

17. The X-ray diagnostic apparatus according to claim 16, wherein the movement control mechanism moves the handgrip to the initial position by the elastic force of an elastic member.

18. The X-ray diagnostic apparatus according to claim 16, wherein the movement control mechanism moves the handgrip to the initial position electrically.

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