JP2007260250A - X-ray diagnostic apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an X-ray diagnostic apparatus capable of moving a retaining member installed on a floor and retaining an X-ray generation source and an X-ray detecting means in the longitudinal direction of a top board while retaining a space for operation and care and being inserted in the shorter direction of the top board. <P>SOLUTION: A C-shaped arm 7 retaining an X-ray tube and a FPD (Flat Panel Display) 5 is connected to a first driving mechanism via an L-shaped arm 9 and the first driving mechanism rotatably retains the C-shaped arm 7. The first driving mechanism is retained linearly movably in the longitudinal direction of the top board 1 by a second retaining mechanism. This constitution can move the C-shaped arm 7 in a state approximately orthogonally crossing with the longitudinal direction of the top board 1. The space for the operation and the care can be thus formed in the both sides of the C-shaped arm 7. The C-shaped arm 7 can be inserted in the shorter direction of the top board 1 so as to respond to various types of radiographing and diagnosis. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to an X-ray diagnostic apparatus for fluoroscopic imaging of a subject, and in particular, a holding member that is installed on the floor and holds an X-ray generation source and an X-ray detection means is moved while securing a space for treatment and care. It is related to the technology.

  Conventionally, cardiovascular examinations and the like have been performed by an X-ray diagnostic apparatus shown in FIG. 6 in a medical facility or the like. This apparatus includes an X-ray tube 63 that irradiates the subject M placed on the top board 61 with X-rays, and a flat panel X-ray detector (hereinafter, referred to as X-ray detector that detects X-rays transmitted through the subject M). 65 (abbreviated as “FPD”) is held by a C-shaped arm 67. The C-shaped arm 67 is movably held by a link mechanism including three bases 71, 72, and 73. That is, the base 71 is installed on the floor so as to be rotatable around the vertical axis A, and holds the base 72 so as to be rotatable around the vertical axis B. The base 72 holds the base 73 around the vertical axis C. The base 73 holds the C-shaped arm so as to be rotatable around the horizontal axis H1. The base 71 to base 73 rotate around the vertical axes A, B, and C, so that the X-ray tube 63 and the FPD 65 held by the C-shaped arm 67 can be seen in FIGS. 7A and 7B. , (C), it can be moved along the longitudinal direction of the top plate 61. Therefore, fluoroscopic imaging can be performed from the head of the subject M to the toes. Further, as shown in FIG. 8, a C-shaped arm 67 can be inserted from the short side direction of the top plate 61. At this time, by using the base 73 to rotate the C-shaped arm 67 around the horizontal axis H1 at a high speed (for example, by rotating 180 degrees in 3 seconds), an imaging technique by rotating DSA (Digital Subtraction Angiography) can be performed. (For example, refer to Patent Document 1).

JP 2003-250784 A

However, the conventional example having such a configuration has the following problems.
That is, in the conventional apparatus, when the C-shaped arm 67 is moved in the longitudinal direction of the top plate 61, the C-shaped arm 67 is flat as is apparent from FIGS. 7 (a), (b), and (c). It will be in the state which cross | intersected diagonally with respect to the longitudinal direction of the top plate 61 visually. Then, a wide open space is formed on one side of the C-arm 67, but the opposite side is narrowed by being surrounded by the top plate 67, the bases 71, 72, 73, and the like. Therefore, there is an inconvenience that the operator can always stand only on one side of the C-shaped arm 67.

  Further, as an X-ray diagnostic apparatus that supports the C-shaped arm 67 from the floor, there is an apparatus configured to slide the C-shaped arm in the longitudinal direction of the top plate (not shown). According to this, it is possible to always keep the C-shaped arm intersecting at a substantially right angle to the longitudinal direction of the top plate. Therefore, the operator can stand on either side of the C-shaped arm. However, in this apparatus, since the C-shaped arm cannot be inserted from the short side of the top plate, there is a disadvantage that the photographing technique is limited, such as difficulty in dealing with the above-described rotation DSA.

  The present invention has been made in view of such circumstances, and the holding member that is installed on the floor and holds the X-ray generation source and the X-ray detection means is a ceiling member that secures a space for treatment and care. An object of the present invention is to provide an X-ray diagnostic apparatus that can be moved in the longitudinal direction of the plate and can be inserted into the short side of the top plate.

In order to achieve such an object, the present invention has the following configuration.
That is, the invention described in claim 1 is an X-ray diagnostic apparatus for fluoroscopic imaging of a subject, an X-ray generation source for irradiating the subject placed on the top plate with X-rays, and X transmitted through the subject. An X-ray detection means for detecting a line; a holding member for holding the X-ray generation source and the X-ray detection means facing each other; a first drive mechanism for rotating the holding member around a vertical axis; And a second drive mechanism that is provided on the floor and linearly moves the first drive mechanism in the longitudinal direction of the top plate.

  [Operation / Effect] According to the first aspect of the present invention, the holding member can be crossed substantially at right angles to the longitudinal direction of the top plate by the first drive mechanism that rotates the holding member around the vertical axis. . Then, the second drive mechanism that linearly moves the first drive mechanism in the longitudinal direction of the top plate keeps the holding member crossed at a substantially right angle with respect to the longitudinal direction of the top plate, while the holding member is It can be moved in the longitudinal direction of the plate. Therefore, a space for treatment and care can be formed on both sides of the holding member. Further, the holding member can be inserted into the short side of the top plate. Therefore, various imaging and diagnosis can be handled.

  In the invention described above, a support arm portion coupled to the first drive mechanism and supporting the holding member is provided, and the second drive mechanism is provided at a rail fixed to the floor and at one end of the rail. A driven pulley provided at the other end of the rail, a belt wound around the manual pulley and the driven pulley, and a second motor for rotating the driven pulley. The first driving mechanism is a moving base that is slidably provided on the rail, the moving base having the belt fixed to a part of the moving base, and a rotation that rotates the support arm portion on the moving base. It is preferable that a mechanism is provided (claim 2). The second driving means can be preferably realized.

  In the above-described invention, the moving base has a driven gear formed on the outer peripheral portion thereof, and holds the support arm portion so as to be free to rotate about the vertical axis, and the rotating mechanism circumscribes the gear. And a first motor that is fixed to the support arm and rotates the main gear (Claim 3). The first driving means can be suitably realized.

  In the above-described invention, it is preferable that the first drive mechanism and the second drive mechanism are disposed below the top plate (Claim 4). By arranging the first and second drive mechanisms below the top plate, the space on both sides of the holding member can be suitably secured.

  In the above-described invention, when the X-ray irradiation axis is vertical, it is preferable that the vertical axis substantially coincides with the irradiation axis. When shifting between the state where the holding member is inserted from the longitudinal direction of the top plate and the state where it is inserted from the short side of the top plate, it is possible to prevent the X-ray irradiation axis from being displaced before and after that. It is.

  This specification also discloses an invention relating to the following X-ray diagnostic apparatus.

  (1) The X-ray diagnostic apparatus according to claim 2, wherein the holding arm part is extendable in a horizontal direction.

  According to the invention described in (1) above, the holding member can be moved closer to or away from the top plate.

  (2) In an X-ray diagnostic apparatus for fluoroscopic imaging of a subject, an X-ray generation source that irradiates the subject placed on the top plate with X-rays and an X-ray detection unit that detects X-rays transmitted through the subject A holding member that holds the X-ray generation source and the X-ray detection unit facing each other, a first drive mechanism that rotates the holding member around a vertical axis, and the first drive mechanism as a top plate An X-ray diagnostic apparatus comprising: a second drive mechanism that is moved in parallel with the longitudinal direction of the second drive mechanism provided on the floor.

  According to the invention as described in said (2), a holding member can be made to cross | intersect at a substantially right angle with respect to the longitudinal direction of a top plate by the 1st drive mechanism which rotates a holding member to the surroundings of a vertical axis | shaft. Then, the second drive mechanism that moves the first drive mechanism in parallel with the longitudinal direction of the top plate maintains the state in which the holding member intersects the longitudinal direction of the top plate at a substantially right angle, and the holding member is moved to the top plate. Can be moved in the longitudinal direction. Therefore, a space for treatment and care can be formed on both sides of the holding member. Further, the holding member can be inserted into the short side of the top plate. Therefore, various imaging and diagnosis can be handled.

  According to the X-ray diagnostic apparatus according to the present invention, the holding member can be crossed substantially at right angles to the longitudinal direction of the top board by the first drive mechanism that rotates the holding member around the vertical axis. Then, the second drive mechanism that linearly moves the first drive mechanism in the longitudinal direction of the top plate keeps the holding member crossed at a substantially right angle with respect to the longitudinal direction of the top plate, while the holding member is It can be moved in the longitudinal direction of the plate. Therefore, a space for treatment and care can be formed on both sides of the holding member. Further, the holding member can be inserted into the short side of the top plate. Therefore, various imaging and diagnosis can be handled.

Embodiments of the present invention will be described below with reference to the drawings.
FIG. 1 is a side view showing a schematic configuration of an X-ray diagnostic apparatus according to the embodiment, FIG. 2 is a plan view of the X-ray diagnostic apparatus according to the embodiment, and FIG. FIG. 3B is a cross-sectional view of the main parts of the first and second movement mechanisms, and FIG. 4 is a schematic perspective view of the first and second movement mechanisms.

  The X-ray diagnostic apparatus according to the embodiment includes a top plate 1, an X-ray tube 3, a flat panel X-ray detector (hereinafter abbreviated as “FPD”) 5, and a C-shaped arm 7. The top plate 1 is provided in a substantially horizontal posture, on which the subject M is placed. The X-ray tube 3 and the FPD 5 are held opposite to each other on both ends of the C-shaped arm 7. The X-ray tube 3 irradiates the subject M with X-rays. The FPD 5 detects X-rays that have passed through the subject M.

  The X-ray diagnostic apparatus according to the embodiment further includes a drive mechanism that supports and moves and rotates the C-shaped arm 7 from the floor. The drive mechanism is a first drive mechanism D1 that rotates around a vertical axis, and a first drive mechanism D1 that linearly moves the first drive mechanism D1 in the longitudinal direction of the top plate 1, and is provided on the floor. And D2. In addition, an L-shaped arm 9 provided between the first drive mechanism D1 and the C-shaped arm 7 is provided. These will be described in detail below, but for the sake of convenience of explanation, the second drive mechanism D2 will be described.

  The second drive mechanism D2 includes a rail 11, a main pulley 13, a driven pulley 15, a speed reducer 17, a second motor 19, a toothed belt 21, and the like. The rail 11 has a linear shape, and is fixed to a floor surface below the top plate 1 in a plan view in parallel with the longitudinal direction of the top plate 1. On one end side of the rail 11, a main driving pulley 13 having a vertical axis V1 as a rotation axis is provided. The main pulley 13 is connected to a second motor 19 via a speed reducer 17. Here, as shown in FIG. 3A, the rotation of the second motor 19 is configured to be transmitted to the speed reducer 17 by the endless belt 23. On the other end side of the rail 11, a driven pulley 15 that can freely rotate about the vertical axis V <b> 2 is disposed in parallel with the main driving pulley 13. A toothed belt 21 is wound around the main pulley 13 and the driven pulley 15 without causing relative slip. And the toothed belt 21 is stretched without loosening on the side of the rail 11 in plan view. The toothed belt 21 corresponds to the belt in the present invention.

  The first drive mechanism D1 includes a moving base 31, a first motor 41, a speed reducer 43, a main driving gear 45, and the like. The moving base 31 has a substantially hemispherical shape, a driven gear 33 having a predetermined width is formed on the outer periphery of the upper portion, and a notch is formed on the lower portion so as to straddle the rail 11. Yes. Bearings 35 that contact the rail 11 are provided on both sides of the inner wall of the notch, and the moving base 31 is slidably held by the rail 11. Furthermore, two penetration parts 37a and 37b are formed in the movement base 31, and the toothed belt 21 stretched on both sides of the rail 11 is passed through these penetration parts 37a and 37b. The toothed belt 21 is fixed by one through portion 37a and a fitting (not shown). Moreover, it is not being fixed with the other penetration part 37b, and is slidably inserted. The toothed belt 21 corresponds to the belt in the present invention.

  The moving base 31 holds the L-shaped arm 9 on its upper surface. Specifically, a circular recess is formed on the upper surface of the moving base 31. A cylindrical portion 9 a that protrudes from one end of the L-shaped arm 9 is fitted into the recess. A ball bearing 39 is provided between the inner peripheral surface of the recess and the outer peripheral surface of the cylindrical portion 9a, and the L-shaped arm 9 is held so as to be rotatable around the vertical axis V3. In this embodiment, when the X-ray irradiation axis irradiated from the X-ray tube 3 is vertical, the vertical axis V3 is positioned so as to substantially coincide with the irradiation axis.

  Furthermore, the L-shaped arm 9 includes a first motor 41 and a speed reducer 43. The rotation shaft of the speed reducer 43 protrudes outside the L-shaped arm 9 and is connected to the main driving gear 45. The main driving gear 45 circumscribes the driven gear 33.

  Further, the L-shaped arm 9 extends in the horizontal direction so as to wrap around the lower outer side of the C-shaped arm 7 and rises upward. The holding portion 53 is supported via the horizontal rotation mechanism 51 at the upper end of the L-arm 9 at the rising edge. The horizontal rotation mechanism 51 includes a motor, a speed reducer, a pinion, a gear, and the like (not shown), and rotates the holding unit 53 around the horizontal axis H1. The holding portion 53 includes a drive mechanism (not shown), and holds the C-shaped arm 7 so as to be rotatable along the bend of the C-shaped arm 7 as indicated by an arrow RA direction. The L-shaped arm 9 corresponds to the support arm portion in the present invention.

  In addition to this, the X-ray diagnostic apparatus according to the present embodiment also displays an image based on the movement control unit of the C-shaped arm 7, the imaging control unit that emits X-rays from the X-ray tube 3, and the detection result of the FPD 5. An image processing unit to be generated and the like (both not shown) are provided.

  Next, the operation of the X-ray diagnostic apparatus according to the embodiment will be described focusing on the movement of the C-shaped arm 7. It is assumed that the C-shaped arm 7 is in a state of intersecting the longitudinal direction of the top board 1 at a substantially right angle by rotating the C-shaped arm 7 about the vertical axis V3 by the first moving mechanism D1. Here, the second motor 19 is driven, and the main driving pulley 13 is rotated via the speed reducer 17. The toothed belt 21 is rotated by the rotation of the main pulley 13, whereby the moving base 31 moves along the rail 11, that is, parallel to the longitudinal direction of the top plate 1. As the moving base 31 moves, the L-shaped arm 9, the horizontal rotation mechanism 51, the holding portion 53, and the C-shaped arm 7 move together. At the time of this movement, the C-shaped arm 7 is moved in parallel while maintaining a state in which the C-shaped arm 7 intersects the longitudinal direction of the top plate 1 at a substantially right angle. The C-arm 7 can be moved back and forth in the longitudinal direction of the top plate 1 by reversing the direction of rotation of the second motor 19 in the forward and reverse directions.

  When the C-shaped arm 7 is moved to a predetermined position, the holding portion 53 is appropriately driven to rotate the C-shaped arm 7 in the arrow RA direction. Thereby, the angle at which the subject M is seen through or imaged can be changed.

  Next, it is assumed that the C-shaped arm 7 has moved to the end of the top plate 1 in a state where the C-shaped arm 7 intersects the longitudinal direction of the top plate 1 at a substantially right angle. Here, the first motor 41 is driven, and the main driving gear 45 is rotated via the speed reducer 43. As the main driving gear 45 rotates about its axis, the main driving gear 45 rotates around the vertical axis V <b> 3 together with the L-shaped arm 9. By the rotation of the L-shaped arm 9, the horizontal rotation mechanism 51, the holding portion 53, and the C-shaped arm 7 rotate integrally. When the L-shaped arm 9 rotates 90 degrees, the C-shaped arm 7 is inserted at a substantially right angle with respect to the lateral direction of the top plate 1 from a state where the C-shaped arm 7 intersects with the longitudinal direction of the top plate 1 at a substantially right angle. Transition to the state. Further, when the L-shaped arm 9 rotates 90 degrees, the C-shaped arm 7 shifts to a state where it intersects at a substantially right angle with respect to the longitudinal direction on the opposite side of the top plate 1 (see FIG. 2). Here, when the X-ray tube 3 and the FPD 5 are held by the C-shaped arm 7 so as to be aligned in the vertical direction, the X-ray irradiation axis is not displaced before and after each transition described above.

  When the C-shaped arm 7 is inserted at a substantially right angle with respect to the short direction of the top plate 1, the horizontal rotation mechanism 51 is appropriately driven to rotate the holding portion 53 at a high speed around the horizontal axis. Thereby, the C-shaped arm 7 rotates around the horizontal axis H1.

  As described above, according to the X-ray diagnostic apparatus according to the embodiment, the C-shaped arm 7 is maintained in the longitudinal direction of the top plate 1 while maintaining a state of intersecting the longitudinal direction of the top plate 1 at a substantially right angle. Since it can be moved, a space for treatment and care can be formed on both sides of the C-shaped arm 7. Further, when the C-shaped arm 7 is moved, it is not necessary to move the subject M, and the C-shaped arm 7, the L-shaped arm 9, the first and second drive mechanisms D1, D2, etc. There is no risk of approaching.

  Furthermore, since the first and second drive mechanisms D1 and D2 are respectively disposed below the top plate 1, a space for treatment and care can be suitably secured on both sides of the C-shaped arm 7. Further, the surgeon does not step on the first and second drive mechanisms D1 and D2, and does not get in the way.

  Further, since the C-shaped arm 7 can be inserted in a state of intersecting at a substantially right angle with respect to the short direction of the top board 1, various diagnoses or photographing such as a rotating DSA can be handled.

  Furthermore, when the C-shaped arm 7 rotates between a state intersecting at a substantially right angle with respect to the longitudinal direction of the top plate 1 and a state of being inserted at a substantially right angle with respect to the short direction of the top plate 1. Since it is possible not to displace the X-ray irradiation axis, it is not necessary to adjust the imaging position before and after the rotation.

  The present invention is not limited to the above-described embodiment, and can be modified as follows.

  (1) In each of the above-described embodiments, the second drive mechanism D2 is composed of the main driving pulley 13, the toothed belt 21, and the like, but is not limited thereto. For example, a known moving mechanism such as a moving mechanism using a screw shaft may be appropriately changed. Similarly, the first moving mechanism D1 is composed of the main driving gear 45 and the like, but a known rotating mechanism such as a rotating mechanism using a belt can be appropriately selected.

  (2) In the above-described embodiment, only the one end of the top plate 1 has been described as moving between the state where the C-shaped arm 7 is inserted from the longitudinal direction and the state where it is inserted from the short side. However, you may comprise so that the above-mentioned C-shaped arm 7 may be rotated in the both-sides edge part of the top plate 1. FIG.

  (3) In the above-described embodiment, the L-shaped arm 9 may be changed as follows. FIG. 5 is a side view showing a schematic configuration of an X-ray diagnostic apparatus according to a modification. As shown in the drawing, an extendable portion 9 b is provided at a portion of the L-shaped arm 9 extending in the horizontal direction. Thereby, the horizontal length of the L-shaped arm 9 can be adjusted. Accordingly, the shooting position can be adjusted by moving the C-shaped arm 7 closer to or away from the top plate 1. In addition, about the same structure as Example 1, detailed description is abbreviate | omitted by attaching | subjecting the same code | symbol.

  (4) In each of the above-described embodiments, the FPD 5 has been described as an example. However, the present invention is not limited to this as long as X-rays can be detected. For example, an indirect detector that converts incident X-rays into light by a scintillator and converts the light into an electrical signal by a semiconductor layer formed of a photosensitive material may be used.

It is a side view which shows schematic structure of the X-ray diagnostic apparatus which concerns on an Example. FIG. 2 is a plan view of the X-ray diagnostic apparatus according to the embodiment. (A) is a top view of the principal part of a 1st, 2nd moving mechanism, (b) is sectional drawing of the principal part of a 1st, 2nd moving mechanism. It is a perspective view of the principal part of a 1st, 2nd moving mechanism. It is a side view which shows schematic structure of the X-ray diagnostic apparatus which concerns on a modification. It is a side view which shows schematic structure of the X-ray diagnostic apparatus which concerns on a prior art. (A), (b), (c) is a figure which shows the operation | movement aspect of the X-ray diagnostic apparatus which concerns on a prior art, respectively. It is a figure which shows the operation | movement aspect of the X-ray diagnostic apparatus which concerns on a prior art.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Top plate 3 ... X-ray tube 5 ... Flat panel type X-ray detector (FPD)
DESCRIPTION OF SYMBOLS 7 ... C-shaped arm 9 ... L-shaped arm 11 ... Rail 13 ... Drive pulley 15 ... Drive pulley 19 ... 2nd motor 21 ... Toothed belt 31 ... Movement base 33 ... Drive gear 41 ... 1st motor 45 ... Drive gear M ... Subject D1 ... First drive mechanism D2 ... Second drive mechanism V3 ... Vertical axis

Claims (5)

  In an X-ray diagnostic apparatus for fluoroscopic imaging of a subject, an X-ray generation source that irradiates the subject placed on a top plate with X-rays, an X-ray detection unit that detects X-rays transmitted through the subject, and A holding member that holds the X-ray generation source and the X-ray detection means facing each other, a first drive mechanism that rotates the holding member around a vertical axis, and a floor, the first drive mechanism An X-ray diagnostic apparatus comprising: a second drive mechanism that linearly moves in a longitudinal direction of the top plate.   2. The X-ray diagnostic apparatus according to claim 1, further comprising: a support arm that is coupled to the first drive mechanism and supports the holding member, and the second drive mechanism is fixed to a floor; A main pulley provided at one end of the rail, a driven pulley provided at the other end of the rail, a belt wound around the manual pulley and the driven pulley, and a first pulley that rotates the main pulley. The first drive mechanism is a moving base slidably provided on the rail, the moving base having the belt fixed to a part of the moving base, and the moving base on the moving base. An X-ray diagnostic apparatus comprising: a rotation mechanism that rotates the support arm portion.   3. The X-ray diagnostic apparatus according to claim 1, wherein the movable base has a driven gear formed on an outer peripheral portion thereof, and holds the support arm portion so as to freely rotate around the vertical axis. The rotating mechanism includes a main driving gear circumscribing the gear, and a first motor that is fixed to the support arm and rotates the main driving gear. apparatus.   4. The X-ray diagnostic apparatus according to claim 1, wherein the first drive mechanism and the second drive mechanism are disposed below a top plate. 5. . 5. The X-ray diagnostic apparatus according to claim 1, wherein when the X-ray irradiation axis is vertical, the vertical axis substantially coincides with the irradiation axis. .

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