JP2520620Y2 - X-ray fluoroscope - Google Patents

Description

[Detailed description of the device]

[0001]

This invention is equipped with an X-ray tube at one end of a C-arm and an image intensifier and an X-ray imaging device at the other end to perform X-ray fluoroscopy and X-ray imaging. The present invention relates to an X-ray fluoroscopic imaging apparatus, and more particularly, to a moving mechanism for moving the X-ray imaging apparatus between an imaging position and a standby position.

[0002]

2. Description of the Related Art The structure of a conventional X-ray fluoroscopic imaging apparatus of this type will be described with reference to FIGS. FIG. 5 is an overall side view of the X-ray fluoroscopic imaging apparatus in which a C-shaped arm is suspended from the ceiling, and FIG. 6 is a CC arrow view of FIG. As shown in the figure, the base end portion of the suspension arm 1 is supported on the ceiling so as to be rotatable about the Y axis, and the tip end portion of the suspension arm 1 is rotatable about the X axis at a C-shaped arm support member. 2 are supported.
The C-arm 3 is attached to the C-arm support member 2 so as to be rotatable about the Z-axis (Z-axis is an axis perpendicular to the paper surface in FIG. 5). An X-ray tube 4 is attached to one end of the C-shaped arm 3.

An image intensifier moving unit 6 for moving the image intensifier 5 in the Y-axis direction is attached to the other end of the C-shaped arm 3, and the image intensifier moving unit 6 has the image intensifier moving unit 6. An image intensifier holding frame 8 that holds the image intensifier 5 via the image intensifier support member 7 is attached. An image intensifier 5 is attached to the image intensifier holding frame 8 so as to face the X-ray tube 4.

Between the image intensifier moving section 6 and the image intensifier 5, a film changer 9, which is one of the X-ray radiographing apparatus, is placed at the radiographing position S.
A mechanism for moving between P and the standby position TP is provided. This mechanism includes a gear 10 rotatably attached to the image intensifier holding frame 8, a pinion 11 meshing with the gear 10, a motor 12 for rotating the pinion 11, a speed reducer 13, and a gear. A base end portion is fixed to 10, and the tip end portion is constituted by an L-shaped support arm 14 having a film changer 9 supported thereon.
When the motor 12 is rotated in the normal and reverse directions, the rotation is reduced by the speed reducer 13.
When the gear 10 that is transmitted to the pinion 11 via the pinion 11 rotates, the support arm 14 swings to move the film changer 9 between the photographing position SP and the standby position TP.

[0005]

However, the conventional example having such a structure has the following problems. That is, when the film changer 9 is moved between the shooting position SP and the standby position TP in the above conventional example, as shown in FIG. 6, in order to avoid interference with the corner KL of the image intensifier 5, The film changer 9 must pass through the locus FK, and the distance XFL between the detection surface of the image intensifier 5 and the shooting surface of the film changer 9 becomes long. During fluoroscopy, the image intensifier 5 is placed as close as possible to the subject M in order to increase the sensitivity of the image intensifier 5, and the film changer at the standby position TP for performing X-ray photography in that state. If 9 is moved to the photographing position SP, there is a problem that the film changer 9 collides with the subject M.

Therefore, it is necessary to move the image intensifier 5 once and then move the film changer 9 to the photographing position SP, resulting in a long operation time and poor operability of the apparatus. I have a problem. Further, if the operation time of the device becomes long, there is also a problem that extra pain is given to the subject M into which the catheter or the like has been inserted.

The present invention has been made in view of the above circumstances, and an object thereof is to provide an X-ray fluoroscopic imaging apparatus capable of promptly switching between X-ray fluoroscopy and X-ray imaging.

[0008]

In order to achieve such an object, the present invention has the following constitution. That is, according to this invention, an X-ray tube is attached to one end of a C-shaped arm, and an image intensifier and an X-ray imaging apparatus are provided on the other end of the C-shaped arm so as to face the X-ray tube. In an X-ray fluoroscopic imaging apparatus to which is attached, a supporting arm that supports the X-ray imaging apparatus, and the supporting arm is swung in order to move the X-ray imaging apparatus between an imaging position and a standby position. A support arm swinging means is provided, and when the support arm swinging means moves the X-ray imaging apparatus between an imaging position and a standby position, the X-ray imaging apparatus is moved along a predetermined locus. A guide groove for allowing the X-ray imaging apparatus to move along the guide groove between the imaging position and the standby position. The diameter between It is obtained by supporting said support arm so as to.

[0009]

[Operation] The operation of the present invention is as follows. The X-ray imaging apparatus is supported by a support arm, and the support arm swinging means swings the support arm to move the X-ray imaging apparatus between a shooting position and a standby position. At this time,
The X-ray imaging apparatus can be moved along the guide groove along a predetermined trajectory while expanding or contracting the diameter between the swing fulcrum of the support arm swinging means and the X-ray imaging apparatus. This predetermined locus is at the photographing position, and the X-ray photographing apparatus is close to the image intensifier (the swing fulcrum of the supporting arm swinging means and the X-axis).
The diameter between the X-ray imaging apparatus and the X-ray imaging apparatus is shortened so that the X-ray imaging apparatus does not interfere with the corners of the image intensifier during movement of the X-ray imaging apparatus (a swing fulcrum of the support arm swinging means). The diameter between the X-ray imaging device and the X-ray imaging device is made longer).

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. In this embodiment, the X-ray fluoroscopic imaging apparatus in which the C-shaped arm described in the conventional example is suspended from the ceiling is taken as an example,
The X-ray imaging apparatus, which is the main part of the present invention, will be described focusing on the mechanical portion that moves between the imaging position and the standby position. FIG.
FIG. 2 is an overall side view showing a configuration of an X-ray fluoroscopic imaging apparatus according to an embodiment of the present invention, FIG. 2 is a view taken along the line AA of FIG. 1, and FIG. 3 is a line taken along the line BB of FIG. FIG. Note that the portions denoted by the same reference numerals as the conventional example have the same configuration as the conventional example, and thus detailed description thereof is omitted here.

As shown in the figure, an image intensifier moving unit 6 for moving the image intensifier 5 in the Y-axis direction is attached to one end side of the C-shaped arm, and the image intensifier moving unit 6 is provided. The image intensifier holding frame 8 is supported by the image intensifier support member 7. The image intensifier 5 is attached to the image intensifier holding frame 8 so as to face the X-ray tube 4.

Between the image intensifier moving section 6 and the image intensifier 5, the film changer (X-ray imaging apparatus) 9 which is the main part of the present invention is placed on the image intensifier holding frame 8 at the imaging position. A mechanism for moving to and from the standby position is provided.

A gear 21 is rotatably mounted on a rotary shaft 20 fixed to the image intensifier holding frame 8 and a guide frame 22 is fixed to the gear 21. The guide frame 22 has an L-shaped support arm 2 having a rear end of the film changer 9 attached to the front end thereof.
The base end side of 3 is slidably loosely inserted. Further, a pinion 24 that meshes with the gear 21 is provided.
The pinion 24 is rotated by the rotation of the motor 25 being transmitted through the speed reducer 26. The rotary shaft 20, the gear 21, the pinion 24, the motor 25, and the speed reducer 26 correspond to the support arm swinging means in this invention, and the rotary shaft 20 corresponds to the swing fulcrum.

A roller 27 is attached to the support arm 23, and a guide groove 28 for guiding the roller 27 is provided in the image intensifier holding frame 8. The guide groove 28 is for moving the film changer 9 along a predetermined locus described later via the roller 27 and the support arm 23. Further, the guide grooves 28 are provided symmetrically so that the film changer 9 can be made to stand by at the left and right standby positions TP ₁ and TP ₂ in FIG.

The operation of moving the film changer 9 between the photographing position and the standby position in the apparatus having the above-described structure will be described below. From the state where the film changer 9 is at the shooting position SP, the standby position T on the right side of FIG.
A case where the film changer 9 is moved to P ₁ will be described. In this case, the motor 25 is rotated in the forward direction, and the pinion 24 is rotated clockwise (in FIG. 2) via the decelerator 26. As a result, the gear 21 that meshes with the pinion 24
Rotates counterclockwise around the rotating shaft 20, and the guide frame 22 also rotates counterclockwise. At this time, the roller 27 moves along the guide groove 28, and the roller 27 moves in the guide groove 28.
The diameter OF between the swing fulcrum (rotating shaft 20) of the support arm 23 and the film changer 9 in accordance with the movement guided by
The support arm 23 swings while extending L in the direction a in FIG. 2 to move the film changer 9 toward the standby position TP ₁ . Then, on the line connecting the swinging fulcrum of the support arm 23 and the corner side KL of the image intensifier 5, the roller 2
When 7 is positioned, the diameter OFL between the swing fulcrum and the film changer 9 is extended most, and the guide groove 28 is provided so that the film changer 9 and the corner side KL of the image intensifier 5 do not interfere with each other. Has been. From this state, the diameter OFL between the swing fulcrum and the film changer 9 is contracted in the direction b in FIG.
3 swings to move the film changer 9 to the standby position TP ₁ .

Further, the film changer 9 is at the standby position T.
When the film changer 9 is moved to the shooting position SP from the state of P ₁ , it can be performed by rotating the motor 25 in the reverse direction and performing the same operation as described above.

By moving the film changer 9 between the photographing position SP and the standby position TP _{1 in} this way, it is possible to avoid the interference between the film changer 9 and the corners KL of the image intensifier 5 while avoiding the image change. The distance XFL between the detection surface of the tensioner 5 and the shooting surface of the film changer 9 can be reduced. Therefore,
When switching from X-ray fluoroscopy to X-ray imaging, in order to avoid interference between the film changer 9 and the subject M, it is not necessary to perform unnecessary operations such as moving the image intensifier 5 upward.

Further, in this embodiment, the guide grooves 28 are provided symmetrically, and the film changer 9 can be moved between the photographing position SP and the standby position TP ₂ on the left side of FIG. is there. That is, the film changer 9 can be made to stand by at any of the left and right waiting positions TP ₁ and TP ₂ . With this configuration, it is possible to make the film changer 9 stand by so as not to interfere with the work of the doctor, depending on the work situation such as the doctor inserting a catheter into the subject M.

In the above embodiment, the X-ray radiographing apparatus in which the C-shaped arm is suspended from the ceiling has been described as an example.
The C-type arm can be similarly applied to an X-ray imaging apparatus fixed to the floor.

Further, in the above-mentioned embodiment, the case where the mechanism for moving the film changer 9 between the photographing position and the standby position is provided between the image intensifier 5 and the image intensifier moving unit 6. As described above, the mechanism for moving the film changer 9 between the shooting position and the standby position is provided at another place, for example, as shown in FIG. 4, with the image intensifier 5 interposed therebetween, and the image intensifier moving unit. It may be provided on the surface opposite to the surface having 6. With the configuration shown in FIG. 4, the weight of the mechanism for moving the film changer 9 between the photographing position and the standby position and the weight of the image intensifier moving unit 6 are balanced to some extent with the image intensifier 5 interposed therebetween. Is improved and the center of gravity of the entire C-shaped arm 3 approaches the center of the C-shaped arm 3, so that the driving energy when rotating the C-shaped arm 3 around the X and Y axes can be reduced.

[0021]

As is apparent from the above description, according to the present invention, by moving the X-ray photographing apparatus between the photographing position and the standby position along the guide groove, the X-ray photographing apparatus and the image can be imaged. It is possible to reduce the distance between the detection surface of the image intensifier and the back surface of the X-ray imaging apparatus while avoiding interference with the corners of the intensifier. Therefore, when switching from X-ray fluoroscopy to X-ray imaging, there is no need to perform unnecessary operations such as moving up the image intensifier in order to avoid interference between the X-ray imaging apparatus and the subject. It is possible to quickly switch between fluoroscopy and X-ray imaging.

[Brief description of drawings]

FIG. 1 is an overall side view showing the configuration of an X-ray fluoroscopic imaging apparatus according to an embodiment of the present invention.

FIG. 2 is a view as viewed in the direction of arrows AA in FIG. 1;

FIG. 3 is a sectional view taken along the line BB of FIG. 2;

FIG. 4 is a side view showing a configuration of a main part of a modified example of the embodiment apparatus.

FIG. 5 is an overall side view of an X-ray fluoroscopic imaging apparatus according to a conventional example.

6 is a view taken along the line CC of FIG.

[Explanation of symbols]

 3 ... C type arm 4 ... X-ray tube 5 ... Image intensifier 8 ... Image intensifier holding frame 9 ... Film changer (X-ray imaging device) 20 ... Rotating shaft 21 ... Gear 22 ... Guide frame 23 ... Support arm 24 ... Pinion 25 ... Motor 26 ... Reducer 27 ... Roller 28 ... Guide groove

Claims (1)

(57) [Scope of utility model registration request] 1. An X-ray tube is attached to one end of a C-shaped arm, and an image intensifier and an X-ray imaging apparatus are provided on the other end of the C-shaped arm so as to face the X-ray tube. In the attached X-ray fluoroscope, the X
A support arm for supporting the X-ray imaging apparatus, and a support arm swinging means for swinging the support arm for moving the X-ray imaging apparatus between a shooting position and a standby position,
Further, when the X-ray imaging apparatus is moved between the imaging position and the standby position by the support arm swinging means,
A guide groove for moving the X-ray imaging apparatus along a predetermined locus is provided, and when the X-ray imaging apparatus is moved between the imaging position and the standby position along the guide groove, the supporting arm swinging means. The X-ray fluoroscopic imaging apparatus is characterized in that the support arm is supported so that a diameter between the swing fulcrum of the X-ray imaging apparatus and the X-ray imaging apparatus can be expanded and contracted.