JPH04295841A - X-ray viewing photographing device - Google Patents

Abstract

PURPOSE:To improve the centroid stability of the X-ray viewing photographing device and to reduce the installation space. CONSTITUTION:On a base 20, a gondola 21 whose bottom face is like a circular arc is supported so as to be freely turnable, and on the upper face part of the gondola, and the front part, a video system (an X-ray tube 23, an image tube 23, an arm 25, etc.) and a top plate 28 are supported, respectively. In the gondola 21, a space S which allows a reciprocating motion and tuning of the video system is formed and constituted. As a result, the video system becomes a shape supported in the upper part of the base 20, and it is excellent in respect of securing the centroid stability and the installation space, comparing with a conventional device in which the video system is protruded to the front and supported.

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 and 6. FIG. 5 is a side view, and FIG. 6 is a plan view. A U-shaped top support arm 3 is attached to a base 2 erected on a floor 1 so as to be rotatable about the X-axis. A top plate 4 is supported at 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 installed.

A moving section 10 is provided so as to be able to reciprocate along the Z-axis direction (longitudinal direction of the top plate 4) on the guide rail 5, and the following image system is rotatably mounted on this moving section 10. is attached to. That is, a C-shaped arm 8 with an X-ray tube 6 and an image tube 7 mounted in a facing state, and
and an arm holder 9 that supports the shaped arm 8 rotatably around the Z-axis. Incidentally, a television camera is attached to the image tube 7 for capturing an output light image of the image tube 7 and outputting a video signal.

[0004] This device functions as follows. 1. By rotating the top support arm 3 around the X-axis, the top 4 and C-shaped arm 8 rotated together around the X-axis, and the subject lying supine on the top 4 was tilted. Enables X-ray photography in a posture. 2. By moving the moving unit 10 in the Z-axis direction,
The imaging system slides in the body axis direction of the subject lying supine on the top plate 4, making it possible to take X-ray images of each part of the body without moving the subject. 3. By rotating the C-shaped arm 8 around the X-axis and the arm holder 9 supporting it around the Z-axis, it is possible to take X-rays of the subject from multiple directions.

A second conventional example is shown in FIGS. 7 and 8. FIG. 7 is a side view, and FIG. 8 is a plan view. In addition, in these figures, the parts indicated by the same reference numerals as those in FIGS. 5 and 6 according to the first conventional example are the same constituent parts, and therefore the description thereof will be omitted here. The difference between this device and the first conventional example is that a top plate support arm 3 is attached to a base 2, and the moving unit 10 and the video system are attached to this top plate support arm 3. The point is that there is. Other configurations and functions are the same.

[0006]

[Problems to be Solved by the Invention] However, in the first conventional example, a top support arm 3 is disposed in a state protruding from the base 2 in the X-axis direction, and a relatively heavy image system (X
Ray tube 6, image tube 7, C-shaped arm 8 that supports them
, an arm holder 9) that rotatably holds the C-shaped arm 8).
Because of this configuration, the following inconveniences occur. a. Since the center of gravity is located away from the base 2 (on the front side along the X-axis direction, this is referred to as the front), it exhibits unstable behavior during vibrations such as earthquakes and during transportation. b. Since the imaging system protrudes forward, it is necessary to secure a relatively large installation space, which limits the number of examination rooms in which it can be installed. c. Since the top plate 4 on which the subject is placed is attached to the tip of the top plate support arm 3, the top plate support arm 3 needs to be made strong, and extra costs are incurred due to the accompanying reinforcement.

On the other hand, in the second conventional example, the top plate support arm 3 is arranged above the base 2, so the top plate support arm 3 is placed in the first position in front of the base 2. Although it is slightly advantageous in terms of weight stability and installation space compared to the conventional example, the relatively heavy image system is placed in front of the top plate support arm 3, that is, as shown by reference numeral A, on the base 2. It is not possible to eliminate the above-mentioned inconvenience.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide an X-ray fluoroscopic imaging apparatus that can eliminate the above-mentioned disadvantages.

[0009]

[Means for Solving the Problems] In order to achieve the above object, the present invention has the following configuration. That is, the present invention provides an imaging system consisting of an arm to which an X-ray tube and an image tube are attached so as to face each other, and a holder section that holds the arm rotatably around the body axis of the subject.
In the X-ray fluoroscopic imaging device configured to be freely rotatable around a horizontal axis perpendicular to the body axis and to be movable reciprocally along the body axis, a space is formed that allows the reciprocating movement and rotation of the imaging system. The present invention is characterized in that a gondola having an arc-shaped bottom is rotatably mounted on a base, the imaging system is mounted to the gondola so as to be movable back and forth, and a top plate on which the subject is placed is supported.

0010

[Operation] According to the structure of the present invention, a space is formed in the gondola to allow the reciprocating movement and rotation of the image system, and this gondola is rotatably mounted on the base, so that relatively heavy images can be The system will be located above the base rather than in front of it. Therefore, the stability of the center of gravity is improved and the installation space is also secured.

[0011]

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 device. A gondola 21 having an arcuate bottom surface is rotatably supported on a base 20 erected on the floor. The gondola 21 has a substantially semicircular ring plate bridged at one end of its upper part, and an image system is attached to this bridging part (this is called a beam part and is designated by the reference numeral 22) so as to be able to move back and forth. . The inner space of the gondola 21, which is approximately ring-shaped, is a space S that allows the reciprocating movement of the imaging system. Further, a top plate 27 on which a subject (not shown) is placed is supported in a cantilevered manner on the front portion of the gondola 21 on the X-axis side.

The imaging system, like the conventional example, is composed of an arm 25 that supports an X-ray tube 23 and an image tube 24 facing each other, and an arm holder 26 that holds this arm 25 rotatably around the Z axis. and the arm holder 26 is
The beam portion 22 of the gondola 21 is supported rotatably around the axis.
It is supported by an image support section 28 that reciprocates in the Z-axis direction on top of the image.

Next, the structure of each part will be explained. FIG. 2 is a partially cutaway side view of the X-ray fluoroscopic imaging device. Arm 25
There is a protruding flange portion 25a on the outer peripheral end of the
The arm holder 26 is provided with a roller 29 that rotatably supports the arm 25 so as to sandwich the flange portion 25a therebetween. A chain 30 is stretched around the outer peripheral surface of the arm 25, and both ends of the chain 30 are fixed to the arm 25, and a part of the chain 30 is connected to the output gear 33 of the drive unit 32 via a gear 31 installed in the arm holder 26. is wrapped around. The arm 25 is guided by the roller 29 and rotates around the Z-axis by this forward and reverse movement of the drive unit 31.

A cylindrical member 34 passing through the image support section 28 is integrally attached to the rear part of the arm holder 26. The body of the cylindrical member 34 is rotatably supported within the image support section 28 by a bearing 35, and a gear 51 is integrally attached to the end projecting outside of the image support section 28. This gear 52 is engaged with the output shaft of a motor 52 built into the image support section 28, and the arm holder 26 is rotated around the X-axis by the forward and reverse movement of the motor 52.

FIG. 3 is a partially cutaway front view of the X-ray fluoroscopic imaging device. Note that the image system and the top plate 27 are not shown in this figure. A U-shaped groove 37 is formed in the circumferential direction on the outer edge of the front surface of the gondola 21, and a plurality of rollers 38 to be inserted into the groove 37 are attached to the base 20. This groove 37 is also formed on the rear surface of the gondola 21, and the base 20 has a roller 38 inserted therein.
are installed in the same way. Two chains 39 are stretched parallel to the outer peripheral surface of the gondola 21. Both ends of these chains 39 are fixed to the gondola 21, and part of them is wound around the output gear 42 of the drive unit 41 via a gear 40 attached within the base 20. This forward and reverse movement of the drive unit 42 causes the gondola 21 to
Rotates around the axis.

[0016] Beam section 22 spanning the gondola 21
A guide rail 43 extending in the Z-axis direction is laid above the guide rail 43, and the image support section 28 is supported via a U-shaped member 44 so as to be able to slide freely on the guide rail 43. Two gears 45 and 46 are arranged in parallel along the Z-axis direction on a surface of the image support section 28 that faces the rear surface of the beam section 22 . One gear 45 is rotatably supported, and the other gear 46 is attached to the output shaft of a motor 47 built into the image support section 28.

On the other hand, there are also two
Two gears 48, 49 are rotatably supported, and these four gears 45, 46, 48, 49 are attached to the beam portion 22.
They are connected to each other by a single chain 50 fixed to both sides of the rear surface. When the motor 47 built into the image support section 28 is operated in the forward and reverse directions, the gears 45, 48, 49 connected by the chain 50 rotate in conjunction with each other, and the image support section 28 slides on the guide rail 43. It is configured to move and run on its own in the Z-axis direction.

With the configuration of each part as described above, this device performs the following functions. 1. By rotating the gondola 21 around the X-axis, the top plate 27 and the imaging system rotate together around the X-axis, and the X
Enables line photography. 2. By moving the image support unit 28 in the Z-axis direction within the space S, the imaging system slides in the body axis direction of the subject lying supine on the top plate 27, and X-rays of each part of the body are carried out without moving the subject. Enables photography. 3. By rotating the arm 25 around the X-axis and the arm holder 26 supporting it around the Z-axis, it is possible to take X-rays of the subject from multiple directions.

Although this device performs the same functions as the conventional device, its structure is superior to the conventional device in terms of center of gravity stability and installation space. That is, Figure 4
As shown in the plan view of FIG.
1 has a space that allows the reciprocating movement and rotation of the imaging system, so the relatively heavy X-ray tube 23 and image tube 2
The arm holder 26 supporting the arm 25 which supports the arm 25 opposite to the arm holder 4 can be moved back to above the base 20. In other words, the image system is supported and held above the base 20.

In order to support and hold the video system above the base 20,
The position of the top plate 27 sandwiched between the X-ray tube 23 and the image tube 24 is also closer to the base 20 than in the past, 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 there is no particular restriction on this structure, and it is possible to support both sides of the top plate 27 by the gondola 21. You can also do this. Also, arm 2
The positions of the X-ray tube 23 and the image tube 24, which are oppositely supported by the image tube 5, may be reversed.

[0022]

According to the structure of the X-ray fluoroscopic imaging apparatus of the present invention, a gondola having an imaging system and a top plate attached to the base is rotatably supported, and the gondola has a structure in which the imaging system can be moved back and forth. Since a space is created that allows for rotation and rotation, the video system, which was conventionally located at the front of the device, can be moved back to above the base, allowing the video system to be supported above the base. It becomes possible to have it. This brings about the following effects. (1) Improved center of gravity stability, resulting in more stable behavior during earthquakes and transportation. (2) The installation space is smaller than before, and the range of test rooms that can be installed is wide, regardless of floor space. (3) As the video system moves backward, the mounting position of the top plate will also move closer to the base, so there is no need to make the members that support the top plate as strong as before, and there is no need for extra reinforcement.
This leads to lower equipment costs. (4) In the past, the video system was placed directly on the arm supporting the top plate and integrated, but as shown in the embodiment of this invention, the top plate and the video system are integrated. Since each of the gondolas is independently supported by the gondola, vibrations such as body movements of the subject on the top board will not be transmitted to the imaging system and cause disturbances in the photographed image, and the image quality can be stabilized.

[Brief explanation of drawings]

FIG. 1 is a perspective view showing the 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 X-ray fluoroscopic imaging device.

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

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

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 part

Claims (1)

[Claims] 1. An imaging system comprising an arm to which an X-ray tube and an image tube are attached so as to face each other, and a holder section that holds the arm rotatably around the body axis of the subject. The
In a fluoroscopic imaging device, a gondola having an arc-shaped bottom and a space for allowing reciprocating movement and rotation of the imaging system is rotatably mounted on a base, and the imaging system is reciprocated on this gondola. An X-ray fluoroscopic imaging device characterized by being movably mounted and supporting a top plate on which a subject is placed.