JPH0750305B2 - X-ray fluoroscope - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an X-ray fluoroscopic imaging apparatus.

[0002]

2. Description of the Related Art A first conventional example is shown in FIGS.
5 is a side view and FIG. 6 is a plan view. A U-shaped top plate support arm 3 is attached to a base 2 erected on the floor 1 so as to be rotatable around the X axis. The top plate 4 is supported on the tip of the top plate support arm 3. A guide rail 5 extending in the longitudinal direction of the top plate 4 is provided on the top surface of the top plate support arm 3.
Has been laid.

A moving part 10 is provided on the guide rail 5 so as to be capable of reciprocating along the Z-axis direction (longitudinal direction of the top plate 4). The moving part 10 is rotatable with the following image system. Is attached to. That is, the X-ray tube 6 and the image tube 7
And a C-shaped arm 8 attached in a state of being opposed to each other, and an arm holder 9 that supports the C-shaped arm 8 rotatably around the Z axis. The image tube 7 is equipped with a television camera that captures an output light image of the image tube 7 and outputs a video signal.

This device functions as follows. 1. By rotating the couchtop support arm 3 about the X-axis, the couchtop 4 and the C-shaped arm 8 integrally rotate about the X-axis, and the subject lying on the couchtop 4 is tilted. Enables X-ray photography in posture. 2. By moving the moving unit 10 in the Z-axis direction, the image system slides in the body axis direction of the subject lying on the top plate 4 and enables X-ray imaging of each part of the body without moving the subject. . 3. By rotating the C-shaped arm 8 around the X-axis center and the arm holder 9 supporting the C-shaped arm 8 around the Z-axis center, X-ray imaging of the subject can be performed from multiple directions.

A second conventional example is shown in FIGS. 7 and 8. 7 is a side view and FIG. 8 is a plan view. In these figures, the same reference numerals as those in FIGS. 5 and 6 according to the first conventional example are the same components, and therefore the description thereof is omitted here. The difference between this device and the first conventional example is that the top plate supporting arm 3 is attached on the base 2, and the moving part 10 and the image system are attached to the top plate supporting arm 3. That is the point. Other configurations and functions are the same.

[0006]

However, in the first conventional example, the top plate supporting arm 3 is arranged so as to project from the base 2 in the X-axis direction, and a relatively heavy image system (X
Since the wire tube 6, the image tube 7, the C-shaped arm 8 that supports these, and the arm holder 9) that rotatably holds the C-shaped arm 8 are attached, the following inconvenience occurs. There is. a. Since the center of gravity is at a position away from the base 2 (on the front side along the X-axis direction, which is the front), vibration such as an earthquake or unstable behavior during transportation is exhibited. b. Since the image system projects forward, it is necessary to secure a relatively large installation space, which limits the inspection rooms that can be installed. c. Since the top board 4 on which the subject rides is attached to the tip end portion of the top board support arm 3, it is necessary to make the top board support arm 3 robust, and extra costs are incurred due to the reinforcement and the like accompanying this.

On the other hand, in the second conventional example, since the top plate support arm 3 is arranged above the base 2, the top plate support arm 3 is located in front of the base 2. Although it is slightly advantageous over the conventional example in terms of weight stability and securing of installation space, a relatively heavy image system is located in front of the top plate supporting arm 3, that is, as shown by the symbol A, the base 2 It is located in front of, and cannot solve the above inconvenience.

The present invention has been made in view of the above circumstances, and it is an object of the present invention to provide an X-ray fluoroscopic apparatus capable of eliminating the above-mentioned inconvenience.

[0009]

The present invention has the following constitution in order to achieve the above object. That is, the present invention provides an image system including an arm to which an X-ray tube and an image tube are attached in a state of being opposed to each other, and a holder unit that holds the arm rotatably around the body axis of the subject.
In an X-ray fluoroscopic apparatus configured to be rotatable about a horizontal axis orthogonal to the body axis and to be reciprocally movable along the body axis, a space for allowing reciprocating movement and rotation of the image system is formed. It is characterized in that a gondola having an arcuate bottom surface is rotatably mounted on a base, the image system is reciprocally mounted on the gondola, and a top plate on which a subject is mounted is supported.

[0010]

According to the structure of the present invention, a space for allowing reciprocating movement and rotation of the image system is formed in the gondola, and the gondola is rotatably mounted on the base. The system will be located above the base rather than in front. Therefore, the stability of the center of gravity is improved and the installation space is secured.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a perspective view showing the appearance of an X-ray fluoroscopic imaging apparatus. A gondola (21) having an arcuate bottom surface is rotatably supported on a base (20) erected on the floor. The gondola 21 has a shape of a substantially semicircular ring plate bridged on one end side of the upper part, and a video system is reciprocally attached to this bridged part (this is called a beam part and is indicated by reference numeral 22). . An inner space of the gondola 21 having a substantially ring shape is a space S that allows reciprocal movement of the image system. Further, a front plate 27 (not shown) on which a subject is placed is supported in a cantilever state on the front surface of the gondola 21 on the X-axis side.

As in the conventional example, the video system includes an arm 25 that supports the X-ray tube 23 and the image tube 24 so as to face each other, and the arm 25.
Of the gondola 21 is reciprocated in the Z-axis direction by supporting the arm holder 26 rotatably around the X axis. It is supported by a moving image support 28.

Next, the structure of each part will be described. FIG. 2 is a partially cutaway side view of the X-ray fluoroscopic apparatus. The outer peripheral end of the arm 25 is provided with a protruding flange portion 25a, and a roller 29 for rotatably supporting the arm 25 so as to sandwich the flange portion 25a is provided in the arm holder 26.
A chain 30 is stretched on the outer peripheral surface of the arm 25, both ends of the chain 30 are fixed to the arm 25, and a part of the chain 30 is driven by a gear 31 mounted in an arm holder 26.
The output gear 33 is wound around. By this forward / reverse operation of the drive unit 31, the arm 25 is guided by the roller 29 and rotates about the Z axis.

At the rear of the arm holder 26, there is an image support unit.
A cylindrical member 34 penetrating 28 is integrally attached. The body portion of the columnar member 34 is rotatably supported by the bearing 35 in the image support portion 28, and the gear 51 is integrally attached to the end portion protruding outside the image support portion 28. This gear 52 is a motor built in the image support unit 28.
It is meshed with the output shaft of the motor 52, and the arm holder 26 is rotated around the X axis by the forward / reverse operation of the motor 52.

FIG. 3 is a partially cutaway front view of the X-ray fluoroscopic apparatus. Note that, in this figure, the image system and the top plate 27 are not shown. On the outer edge of the front of the gondola 21, a U-shaped groove 37 is formed in the circumferential direction, and a groove is formed on the base 20.
A plurality of rollers 38 inserted into 37 are mounted. This groove 37 is also formed on the rear surface of the gondola 21,
A roller 38 inserted into the base 20 is similarly attached to the base 20. Two chains 39 are stretched in parallel on the outer peripheral surface of the gondola 21. Both ends of these chains 39 are fixed to the gondola 21, and a part of them is wound around the output gear 42 of the drive unit 41 via the gear 40 mounted in the base 20. By this forward / reverse operation of the drive unit 42,
The gondola 21 rotates about the X axis.

A guide rail 43 extending in the Z-axis direction is laid on the beam portion 22 spanning the gondola 21, and a "U" -shaped member 44 is slidably mounted on the guide rail 43.
The image support unit 28 is supported via. Image support unit 28
Two gears 45, 46 are arranged in parallel along the Z-axis direction on the surface of the beam portion 22 facing the rear surface. One gear 45 is rotatably supported, and the other gear 46 is attached to the output shaft of a motor 47 built in the image support unit 28.

On the other hand, two gears 48 and 49 are rotatably supported on both sides of the rear surface of the beam portion 22.
The two gears 45, 46, 48, 49 are connected to each other by a chain 50 fixed to both sides of the rear surface of the beam portion 22. When the motor 47 built in the image support unit 28 is operated in the forward and reverse directions, the gears 45, 48, which are connected by the chain 50,
The image support portion 28 slides on the guide rail 43 and is self-propelled in the Z-axis direction.

From the configuration of each part as described above, this device fulfills the following functions. 1. By rotating the gondola 21 about the X axis, the top plate 27 and the image system integrally rotate about the X axis.
It enables X-ray imaging in a posture in which the subject lying on the top 27 is tilted. 2. By moving the image support unit 28 in the space S in the Z-axis direction, the image system slides in the body axis direction of the subject lying on the top plate 27, and the X-ray of each part of the body can be moved without moving the subject. Enable shooting. 3. By rotating the arm 25 around the X-axis center and the arm holder 26 supporting the arm 25 around the Z-axis center, X-ray imaging of the subject can be performed from multiple directions.

As described above, although it has the same function as that of the conventional device, it is superior in structure to the conventional device in terms of stability of the center of gravity and installation space. That is, FIG.
As shown in the plan view of FIG. 1, a gondola 21 on which a video system is attached is rotatably supported on a base 20, and a space is formed in the gondola 21 to allow reciprocal movement and rotation of the video system. Therefore, the arm holder 26 that supports the arm 25 that supports the relatively heavy X-ray tube 23 and the image tube 24 so as to face each other.
Can be retracted above the base 20. In other words, it is ideal for supporting the video system above the base 20.

Since the image system is supported above the base 20, X
The position of the top plate 27 sandwiched between the line tube 23 and the image tube 24 is also closer to the base 20 than in the conventional case, and the strength of the member supporting the top plate 27 does not need to be so strong.

In the above-described embodiment, one side of the top plate 27 is supported by the gondola 21, but the structure is not particularly limited, and both sides of the top plate 27 are supported by the gondola 21.
You may make it support by. Further, the positions of the X-ray tube 23 and the image tube 24, which are supported opposite to the arm 25, may be reversed.

[0022]

According to the construction of the X-ray fluoroscopic imaging apparatus of the present invention, the gondola on which the image system and the top plate are attached is rotatably supported on the base, and the gondola reciprocates. Since a space that allows rotation and rotation is formed, it is possible to retract the image system that was conventionally located in front of the device to above the base, and support the image system above the base. It becomes possible to have. As a result, the following effects are exhibited. (1) The stability of the center of gravity is improved, and the behavior during an earthquake or transportation is stabilized. (2) The installation space is smaller than before, and the range of inspection rooms that can be installed is wide without being affected by the floor area. (3) Since the mounting position of the top plate becomes closer to the base as the image system retreats, it is not necessary to make the member supporting the top plate as robust as before, and it is not necessary to provide extra reinforcement. Leading to cost reduction. (4) In the past, the image system was placed directly on the arm supporting the top plate and integrated, but as shown in the embodiment of the present invention, the top plate and the image system are integrated. Since each is independently supported by a gondola, vibrations such as body movements of the subject on the top plate are not transmitted to the image system and disturb the captured image, and the image quality can be stabilized.

[Brief description of drawings]

FIG. 1 is a perspective view showing an external appearance of an X-ray fluoroscopic imaging apparatus according to an embodiment of the present invention.

FIG. 2 is a partially cutaway side view of the fluoroscopic imaging apparatus.

FIG. 3 is a partially cutaway front view of the X-ray fluoroscopic apparatus.

FIG. 4 is a plan view of the X-ray fluoroscopic imaging apparatus.

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

FIG. 6 is a plan view of an X-ray fluoroscopic imaging apparatus according to a first conventional example.

FIG. 7 is a side view of an X-ray fluoroscopic imaging apparatus according to a second conventional example.

FIG. 8 is a front view of an X-ray fluoroscopic imaging apparatus according to a second conventional example.

[Explanation of symbols]

 20 ... Base 21 ... Gondola 23 ... X-ray tube 24 ... Image tube 25 ... Arm 26 ... Arm holder 27 ... Top plate 28 ... Image support

Claims (1)

[Claims] 1. An image system comprising an arm having an X-ray tube and an image tube attached in a state of being opposed to each other, and a holder section for rotatably holding the arm around a body axis of a subject. In an X-ray fluoroscopic imaging apparatus configured to be rotatable about a horizontal axis orthogonal to the body axis and to be reciprocally movable along the body axis direction, a space for allowing reciprocating movement and rotation of the image system is formed. An X-shaped gondola having an arcuate bottom surface is rotatably mounted on a base, the image system is reciprocally mounted on the gondola, and a top plate on which a subject rides is supported. Fluoroscopic imaging device.