JP2011161139A - Diagnostic x-ray equipment - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide compact and mobile C-arm type diagnostic X-ray equipment having high stability. <P>SOLUTION: This diagnostic X-ray equipment includes: a carriage capable of moving a floor surface; a support erected on the carriage and having a shaft along the vertical direction; a first arcuate arm supporting an X-ray generator and an X-ray image receptor oppositely so as to place a subject therebetween; an arm support mechanism which has a second arm extending from the first arm towards the outside and which movably supports the first arm; and a rotating mechanism connecting the support to the arm support mechanism and rotating the arm support mechanism along with the first arm. This diagnostic X-ray equipment further includes a stabilization mechanism making the carriage follow the rotating direction of the first arm when the first arm is rotated by the rotating mechanism. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to an X-ray diagnostic apparatus, and more particularly to a technology for improving the stability of a mobile C-arm X-ray diagnostic apparatus.

  The mobile C-arm X-ray diagnostic device is said to be as small as possible to ensure operability or avoid interference with the operating table / operator. Moreover, since it is used in a narrow place, good turning performance is required. Therefore, the vehicle width of the front wheels is narrow, the vehicle width of the rear wheels is wide, and the shape seen from the upper side in the vertical direction has a trapezoidal shape. Furthermore, the function of the C-arm is narrowed down to reduce the weight so that it does not become unstable.

  On the other hand, C-arms are required to support high-performance applications such as IVR, and examples of such applications include extending the movement stroke of C-arms and adding the following new functions.

  For example, as an example of adding a new function, the C-arm movement in the longitudinal direction of the operating table has been changed from a circular arc trajectory by the C-arm swing mechanism to a linear movement by the C-arm left-right movement mechanism. (For example, see Patent Document 1). There are also those equipped with both of these (see, for example, Patent Document 2).

JP 2002-177251 A International Publication WO01 / 010300 Publication

However, by adding support for the above high-performance applications, the weight of the C-arm increases and becomes unstable. Patent Documents 1 and 2 do not disclose a technique for improving stability.
Therefore, an object of the present invention is to provide a mobile C-arm type X-ray diagnostic apparatus that is small and highly stable.

  In order to solve the above-described problems, the present invention includes a carriage that can move on a floor surface, a strut mechanism that is erected on the carriage and has a shaft in the vertical direction, an X-ray generator, and an X-ray image receiving device. An arc-shaped first arm that supports the subject so as to be positioned so that the subject can be positioned therebetween, and a second arm that extends outward from one point in the arc-shaped arm. An arm support mechanism that is movably supported, and a rotation mechanism that connects the support mechanism and the arm support mechanism and rotates the arm support mechanism together with the first arm about the shaft as an axis. The line diagnosis apparatus includes a stabilization mechanism that causes the carriage to follow the rotation direction of the first arm when the first arm is rotated by the rotation mechanism.

  According to the present invention, a mobile C-arm X-ray diagnostic apparatus that is small and highly stable is provided.

The figure which shows the whole structure of a mobile C arm type | mold X-ray diagnostic apparatus. 1 is a diagram showing Example 1 according to the present invention. FIG. The figure which shows the difference in the positioning by a left-right movement mechanism and a swing mechanism. The figure which shows the movement of the gravity center position in the case of only a left-right moving mechanism. The figure which shows the movement of the gravity center position in the case of the right-and-left + swing mechanism. FIG. 6 is a diagram showing the center of gravity position in the case of the first embodiment. FIG. 5 is a diagram showing Example 2 according to the present invention.

  Hereinafter, embodiments of the present invention will be described in detail. FIG. 1 is a diagram showing an overall configuration of a mobile C-arm X-ray diagnostic apparatus. In FIG. 1, an X-ray generation unit 12 and an X-ray image receiving unit 13 are arranged opposite to each other, supported by a C-type arm unit 11, and a C-type arm unit 11, an X-ray generation unit 12, and an X-ray image reception unit 13 And the whole C arm. The arm support 10 is provided alongside the C arm unit 11 and supports the entire C arm so that it can move in an arc (b direction). The housing 100 is connected to the arm support base 10 and supports the arm support base 10 so that the arm support base 10 can move forward and backward, right and left, and turn. The left and right guides 5 support the housing 100 so as to be movable left and right. The vertical movement support column 1 supports the left and right guides 5 so as to be movable up and down. In addition, a main body 15 is provided for guiding the vertically movable support column 1 so as to be movable up and down and storing an X-ray control unit, etc., so that these can be moved by two main wheels 18 and two free wheels. A carriage unit 17 having a certain front wheel 19 is provided. The vertical movement support column 1 is provided with a swing mechanism unit 35 that enables swinging of the C arm by rotating about a height direction axis from the floor surface.

  That is, the mobile C-arm type X-ray diagnostic apparatus according to the present invention includes a cart (cart 17) that can move on the floor, and a column (vertical motion column 1) that is erected on the cart and has an axis along the vertical direction. ), An arc-shaped first arm (entire C arm) that supports the X-ray generator and the X-ray image receiving device so that the subject can be positioned therebetween, and an outer side from the first arm. An arm support mechanism (housing 100 and arm support base 10) having a second arm extending toward the arm and movably supporting the first arm; and the strut and the arm support mechanism are connected to each other, and the arm A rotation mechanism (swing mechanism 35) is provided that rotates the support mechanism together with the first arm.

  Next, a mechanism in which one of the two front wheels of the carriage is directed in the swinging direction in conjunction with the C-arm swinging which is a feature of the first embodiment of the present invention will be described with reference to FIG. 2, FIG. 2 (a) is a view of the inside of the main body portion 15 and the carriage portion 17 of FIG. 1 as viewed from above in the vertical direction, and FIG. 2 (b) is a view as viewed from the side.

  2 (a) and 2 (b), the two front wheels 19 are fixed to the two front wheel arms 31. The two front wheel arms 31 are supported by the carriage 17 so as to be able to rotate around the shaft 41. When there is no swing, the front wheels 19 are connected to the carriage 17 and the spring element 32 so that the front wheels 19 have a minimum width.

  Further, there are a cam 33a and a cam 40 that transmit the C arm swing to the front wheel arm 31. The vertically moving strut 1 is composed of a fixed strut 36 and a moving strut 37, and moves up and down as the moving strut 37 moves inside the fixed strut 36. The fixed column 36 has a guide 38 that can rotate the outer periphery of the fixed column 36. The movement of the guide 38 is transmitted to the cam 33a by the cam 40 and to the front wheel arm 31. The head swing mechanism 35 has a cam 39 that transmits the rotation to the guide 38. The cam 39 is inserted into a hole provided in the guide 38 and does not interfere when the support column moves up and down, and can transmit only rotation.

  More specifically, the cam 33a, the front wheel arm 31, and the front wheel 19 include a cam 33a-1, a front wheel arm 31-1, a front wheel 19-1, a cam 33a-2, a front wheel arm 31-2, and a front wheel 19-2. When the C-arm swing rotates counterclockwise, the cam 40 rotates counterclockwise, the upper cam 33a-1 is pushed, and the front wheel arm 31-1 and front wheel 19-1 are counterclockwise. Rotate around (Fig. 2 (c)). Then, when the C arm swinging again returns to the right direction, the front wheel arm 31-1 and the front wheel 19-1 are returned to the original state by the spring element 32. When the C arm swings clockwise, the cam 40 rotates clockwise, the upper cam 33a-2 is pushed, and the front wheel arm 31-2 and the front wheel 19-2 rotate clockwise (see FIG. 2 (d)).

That is, according to the above configuration, the rotation mechanism includes the stabilization mechanism that causes the carriage to follow the rotation direction of the first arm when the first arm is rotated. More specifically, the stabilization mechanism is a set of a front wheel and a front wheel arm for fixing the front wheel to the carriage. Two sets of front wheels and front wheel arms are provided. When the carriage follows the carriage in the rotation direction of the first arm by the stabilization mechanism, only one of the two sets moves. The stabilization mechanism includes transmission means for transmitting rotation by the rotation mechanism to the front wheel arm. The transmission means includes a first member (40) attached to the column and a second member (33a) attached to the front wheel arm, and the first member is rotated when the first member is rotated. A rotation is applied to one of the two members. A spring element is provided between the two front wheel arms and the carriage.
With the above configuration, it is possible to provide a cart in which one of the front wheels moves in the C arm swing direction in conjunction with the C arm swing. This mechanism can be configured to be electrically driven by a mechanism (not shown) or to be electrically assisted with respect to a manual operation.

  In addition, according to the said Example, both C arm left-right movement and a swing mechanism can be mounted, The effect by that is shown below.

  The C-arm left and right movement will be described because the effect is remarkable in an example in which the diseased part of the head is inserted into the head while observing the catheter and used for examination and treatment of the blood vessels of the head. That is, in this example, a catheter is inserted from the O1 point of the subject shown in FIG. 3, and this catheter is followed by the movement of the catheter to the O2 point that is the diseased part of the head blood vessel. In this example, the C-arm positioning operation is performed according to the procedure described below.

  (1) First, move the X-ray fluoroscopic apparatus, and receive the X-ray generator 12 and X-ray image supported by the C-arm 11 so as to sandwich the subject 21 lying on his back on the operating table The unit 13 is disposed so that the fluoroscopic imaging apparatus is not moved at this position.

(2) Next, while observing the position of the catheter with a fluoroscopic image, the X-ray generator is adjusted by moving and rotating the mechanisms of the C-arm up and down, turning, swinging, back and forth, and left and right. Positioning is performed so that the center of the irradiated X-ray from 12 coincides with the O1 point.

  (3) Next, when moving the catheter to the target position of the head blood vessel shown in FIG. 3 up to point O2, while following the catheter while observing the tip of the catheter, use the left and right movement mechanism of the C arm. The X-ray generator 12 and the X-ray image receiver 13 are moved linearly so that the center of the X-ray irradiated from the X-ray generator 12 coincides with the point O2.

  (4) Then, the state diseased part in which the X-ray generation part 12 and the X-ray image receiving part 13 are aligned with the point O2 is examined and treated. When the target position is changed as necessary, the X-ray generation unit 12 and the X-ray image receiving unit 13 are properly aligned with the changed target position using the above-described mechanisms, and examination and treatment are performed. .

  As described above, by using the left and right movement mechanism of the C arm by the X-ray fluoroscopic imaging apparatus according to the embodiment of the present invention, the C arm can be linearly moved and positioned at the target position. Therefore, according to the embodiment of the present invention, the C arm is moved along the circumference of the rotation radius R in the swing rotation of the C arm using the conventional swing mechanism, and the deviation between the moved position and the target value is shifted. Since there is no need for correction using the C-arm back-and-forth movement mechanism, it is possible to perform alignment in a short time, thereby shortening the fluoroscopy time and reducing the exposure X-ray dose to the subject. . According to the above-described embodiment, it is possible to provide a high-performance apparatus that is small in size and has good operability and is equipped with a C-arm neck swing mechanism and a C-arm left-right movement mechanism.

  Because it can move left and right, it can be taken in an arc shape and positioning in detail becomes easy. It is suitable not only for orthopedic applications but also for procedures that follow the tip of a catheter, such as IVR, and can provide a multipurpose device.

  FIG. 3 also shows the trajectory of the C arm in the above-described example in the prior art and the embodiment of the present invention. In the case of the prior art, the trajectory is drawn with the rotation radius R of the swinging rotation of the C arm from the point O1. In the case of the embodiment of the present invention, the left and right movements of the C arm are moved to the O3 point along the circumferential point E and then moved to the O2 point by ΔL by the C arm back-and-forth movement mechanism. The mechanism can be moved from the O1 point to the O2 point. Also, looking at the image on the monitor, when the position of the O2 point is aligned using the conventional swing rotation mechanism, the image on the monitor is also rotated by the swing angle α. In the case of the embodiment of the present invention, there is no change in the display angle of the image on the monitor and the user and the observation are performed. Can provide an easy-to-see image.

  As a positioning means for aligning the X-ray generator and the X-ray image receiving unit supported by the C arm on the fluoroscopic and radiographic part by the left-right movement mechanism, the C arm is used in the direction opposite to the subject. Using the left and right C-arm left / right movement mechanism, the position correction by the back-and-forth movement mechanism that moves in the direction perpendicular to the subject's body axis direction, which is required by the positioning means by the conventional swing mechanism, is unnecessary. Thus, the alignment time can be shortened by the amount of the position correction, the operability is improved, and the exposure time can be reduced by shortening the fluoroscopic time.

  On the other hand, the C-arm swinging movement is complicated as described above, but it can be operated lightly from the tip of the C-arm by the lever principle and moves in an arc shape. Easy to shoot.

  Therefore, in order to reflect both merits in photographing on the apparatus, it is possible to use the apparatus with a higher function and a multipurpose purpose by providing an apparatus that rotates the left-right movement mechanism.

Next, the stability when both the C-arm left-right movement and the swing mechanism are mounted will be described.
Fig. 4 shows the center of gravity of the device with only the left / right movement mechanism in the conventional cart. When the C-arm is at the center, the center of gravity is at the center of the device, but the center of gravity moves in the direction of movement by left-right movement. In order to maintain the stability of the device, the position of the center of gravity is in a trapezoid trapped by wheels, and the stability increases as the trapezoid centroid and the center of gravity are closer.

  Fig. 5 shows the center of gravity of the device when both left and right motion and swing are mounted. Since the head is further swung from the left-right moved state, the position of the center of gravity further moves and becomes more unstable. In order to solve this, it is effective to increase the area surrounded by the wheels, but this leads to an increase in the size of the entire apparatus and the operability is lowered.

  According to the form of the above embodiment, as shown in FIG. 6, since the position of one of the front wheels 19 is moved in the direction interlocked with the movement of the C arm, the area surrounded by the wheels can be increased. It is possible to arrange the center of gravity of the entire C arm. Also, since the wheel moves in the direction in which the C-arm is moved, there are no surgeons or equipment in that direction. Therefore, it is possible to provide a device with high functionality and good operability while being small.

  Next, a mechanism in which both front wheels of the two carriages are directed in the swinging direction in conjunction with the C-arm swinging which is a feature of the second embodiment of the present invention will be described with reference to FIG. In FIG. 7, FIG. 7 (a) is a view of the inside of the main body portion 15 and the carriage portion 17 of FIG. 1 as viewed from above in the vertical direction, and FIG. In the second embodiment, the cams 33b attached to the two front wheel arms 31 are integrated so that the cam 40 side is recessed when viewed from the vertical direction, and the cam 40 is sandwiched in the recesses. Alternatively, the cam 33b has a hole in which the cam 40 is sandwiched. Therefore, the two front wheel arms and the two front wheels 19 are moved in a direction in which the entire C arm is swung by the swing mechanism 35.

  More specifically, the front wheel arm 31 and the front wheel 19 include a front wheel arm 31-1, a front wheel 19-1, a front wheel arm 31-2, and a front wheel 19-2. When the C arm swings counterclockwise, the cam 40 rotates counterclockwise, the cam 33b rotates counterclockwise, the front wheel arm 31-1, the front wheel 19-1, and the front wheel 31. -2 and the front wheel 19-2 are united and rotate counterclockwise (FIG. 7 (c)). When the C arm swings clockwise, the cam 40 rotates clockwise, the upper cam 33b rotates clockwise, and the front wheel arm 31-1, front wheel 19-1, front wheel arm 31-2 The front wheel 19-2 integrally rotates in the clockwise direction (FIG. 7 (d)).

  That is, according to the above configuration, when the carriage is caused to follow the rotation direction of the first arm by the stabilization mechanism, both of the two sets move. The stabilization mechanism includes transmission means for transmitting rotation by the rotation mechanism to the front wheel arm. The transmission means includes a first member attached to the support column and a third member (33b) attached to each front wheel arm as a single body, and the first member is rotated. And rotation is applied to the third member.

  However, the present invention can be variously modified without departing from the scope of the invention. For example, the transmission means includes a drive motor that drives the two front wheel arms between the two front wheel arms so that the two front wheel arms are opened when the first arm is rotated. It may be.

  17 bogies, 19 front wheels, 31 front wheel arms, 33a cams, 36 fixed struts, 37 moving struts, 38 guides, 40 cams, 41 axles

Claims (10)

  A carriage that can move on the floor, a column that is erected on the carriage and that has an axis along the vertical direction, and an X-ray generator and an X-ray image receiving device that face each other so that the subject can be positioned therebetween. An arc-shaped first arm for supporting, a second arm extending outward from the first arm, an arm support mechanism for movably supporting the first arm, the support column, and the arm In an X-ray diagnostic apparatus having a rotation mechanism that connects to a support mechanism and rotates the arm support mechanism together with the first arm, the rotation mechanism rotates the first arm when the first arm is rotated. An X-ray diagnostic apparatus comprising a stabilization mechanism for causing the carriage to follow the rotation direction of the first arm.   The X-ray diagnostic apparatus according to claim 1, wherein the stabilization mechanism includes a front wheel and a front wheel arm for fixing the front wheel to a carriage.   The X-ray diagnostic apparatus according to claim 2, comprising two sets of the front wheel and the front wheel arm.   The X-ray diagnostic apparatus according to claim 3, wherein when the carriage follows the carriage in the rotation direction of the first arm, only one of the two sets moves.   The X-ray diagnostic apparatus according to claim 3, wherein when the carriage follows the carriage in the rotation direction of the first arm, both of the two sets move.   The X-ray diagnostic apparatus according to claim 2, wherein the stabilization mechanism includes transmission means for transmitting rotation by the rotation mechanism to the front wheel arm.   The transmission means includes a first member attached to the support column and a second member attached to the front wheel arm. When rotation is applied to the first member, one of the second members is provided. The X-ray diagnostic apparatus according to claim 4, wherein rotation is given.   The transmission means includes a first member attached to the column and a third member attached to each front wheel arm, and the first member is rotated when the first member is rotated. The X-ray diagnostic apparatus according to claim 5, wherein rotation is given to the three members.   The X-ray diagnostic apparatus according to any one of claims 2 to 8, wherein a spring element is provided between the front wheel arm and the carriage.   The transmission means includes a drive motor for driving the two front wheel arms between the two front wheel arms, and the two front wheel arms are opened when the first arm is rotated. The X-ray diagnostic apparatus according to claim 3, wherein:

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