JPH01284231A - Device for x-ray fluoroscopic photographing - Google Patents

Abstract

PURPOSE:To make a device small in size and light in weight as well as to enable X-ray fluoroscopic photographing such as oblique entrance or tomogram to be performed with ease by rotating a X-ray source at a fulcrum of the rotating center O2 of a support column accompanied with the movement of the X-ray source at a fulcrum of a rotating center O1, and thereby letting a spot device be moved in parallel in such a way as to be faced with the X-ray source. CONSTITUTION:A X-ray tube 2 is rotated at a fulcrum of the rotating center O2 of a tube support column 3, and a spot device 4 is arranged in such a way as to be faced with the X-ray tube 2, and is separated from the support column 3 so that a transmitted image permeating through a man to be examined is photographed onto a film. Then, the X-ray tube 2 is rotated at a fulcrum of a rotating center O1 accompanied with the vertical movement of it so that it is moved in parallel in the longer direction A of a bed 1 by the length corresponding to an angle theta=tan<-1> (b/l1). The spot device 4 is moved by a movement (a)=l2tantheta at a fulcrum of the rotating center O1 accompanied with the movement of the X-ray tube 2 in such a way as to be faced with the X-ray tube 2. When the man to be examined is fluoroscopically photographed normally, the angle theta shall be zero with which the X-ray tube 2 and the spot device 4 are synchronized. There is no need for a separate rotating and moving mechanism, this constitution can thereby make a device small in size and light in weight, concurrently enabling fluoroscopic photographing such as oblique entrance and tomogram to be performed with ease.

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial Application Field) The present invention relates to an X-ray fluoroscopic imaging apparatus equipped with an oblique entry and tomography mechanism in an X-ray fluoroscopic imaging table.

(Prior Art) Conventionally, an X-ray fluoroscopic imaging apparatus that performs tomography using an X-ray fluoroscopic imaging table has a configuration shown in FIG. This X-ray fluoroscopic imaging apparatus has a bed 51. X-ray tube 52,
It is composed of a tube support section 53 and a spotting device 54.

The tube support section 53 and the spotting device 54 are mechanically connected, and the tube support section 53 and the spotting device 54 operate together to move the spotting device 54 up and down.

Furthermore, when performing oblique photography or tomography of a subject (not shown), the X-ray tube 52 is moved in the longitudinal direction of the bed 5, for example
The tube support portion 53 is configured to rotate so as to move it to the position of the wire tube 52a. In addition, in the above shooting,
The tube support 53 and the spotting device 54 move so as to face each other. Furthermore, when photographing with a film changer is performed, the X-ray tube 52 rotates horizontally or vertically as shown by an X-ray tube 52b to emit X-rays. Therefore, X-ray fluoroscopic imaging of the subject is performed using the apparatus configured in this manner.

(Problems to be Solved by the Invention) However, the conventional X-ray fluoroscopic imaging apparatus described above has the following problems. That is, the tube support section 53 and the spot device 54 are connected, and the X-ray fluoroscopic imaging device has a rotation mechanism for rotating the tube support section 53 and a rotation mechanism for integrally moving the tube support section 53 and the spot device 54. Since a mechanism and a moving mechanism for moving the spotting device 54 and the tube support section 53 so as to face each other are provided, the structure of the device becomes complicated, and the device becomes large and heavy. was there.

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide an X-ray fluoroscopic imaging apparatus that can be simplified in configuration, reduced in size and weight, and capable of easily performing X-ray fluoroscopic imaging such as oblique entry or tomography.

[Configuration of the Invention (Means for Solving the Problems) The present invention has taken the following measures in order to solve the above problems and achieve the objectives. That is, the present invention provides an X-ray source that irradiates X-rays to a subject placed on a bed, a support that supports the X-ray source, and an X-ray source that is installed and supported by the support and that is provided separately from the support. A spot device that imprints an X-ray fluoroscopic image transmitted through a specimen, and when performing oblique photography or tomography, as the X-ray source is moved around the rotation center Of
The apparatus includes a control mechanism that rotates the radiation source about the rotation center 02 of the support column and moves the spotting device in parallel so as to face the X-ray source.

(Effects) By taking such measures, the following effects are achieved. According to the present invention, when performing oblique imaging or tomography, as the X-ray source is moved around the rotation center 01 by the control mechanism, the X-ray source is moved around the rotation center 02 of the support column. further, the spotting device is translated and rotated so as to face the X-ray source,
An X-ray photograph is taken. Therefore, there is no need to provide separate rotation mechanisms or movement mechanisms, and the structure is simple and the apparatus can be made smaller and lighter, allowing for easy oblique entry or fluoroscopic imaging such as tomography. Furthermore, stretcher photography, chest stand photography, and film changer photography can be easily performed.

(Embodiment) FIG. 1 is a schematic configuration diagram showing an embodiment of an X-ray fluoroscopic imaging apparatus according to the present invention. This X-ray fluoroscopic imaging device is for performing tomography of a subject, for example, and includes a bed IS X-ray tube 2.
, a tube support section 3, and a spotting device 4. The bed L is for carrying a patient (not shown), and the X-ray tube 2
is to irradiate the subject with X-rays. The tube support column 3 is for mounting and supporting the X-ray tube 2.

The X-ray tube 2 can rotate about the rotation center 02 of the tube support column 3 as a support axis. The spotting device 4 is arranged so as to face the X-ray tube 2, is separated from the supporting column 3, and records a transmitted image transmitted through the subject onto a film. The X-ray tube 2 rotates as it moves up and down, so that it moves parallel to the longitudinal direction A of the bed 1 by an angle θ-tan (b/11) with the rotation center 01 as a supporting axis. . Further, as the X-ray tube 2 moves, the spot device 4 moves by a movement amount a-x2 tan θ so as to face the X-ray tube 2 with the rotation center 01 as a supporting axis.

Note that normally, when performing fluoroscopy and imaging of a subject, the angle is θ-0, and the X-ray tube 2 and spot device 4 are synchronized.

FIG. 2 is a diagram showing an apparatus for performing cassette imaging using a stretcher and chest imaging using a chest stand.

This apparatus is comprised of a stretcher 5 on which a subject is placed, a cassette 6 placed on the stretcher 5 for storing an X-ray film, and a chest stand 7 for photographing the chest.

In the figure, the X-ray tube 2 is rotated by an angle θl or an angle (θl+02) so as to irradiate the stretcher 5 or the chest stand 7 with X-rays. That is, when performing cassette imaging using the stretcher 5, the X-ray tube 2 rotates 90'' relative to the tube support 3, and when performing imaging using the chest stand door.
It rotates 180'' relative to the tube support 3.

FIG. 3 is a diagram showing photographing with a film changer. This film changer photography is for changing the film from the spotting device 4b to the spotting device 4a when photographing a film stored in the spotting device 4.

FIG. 4 is a diagram showing a control mechanism for controlling the operations of the X-ray tube 2 and the spotting device 4. This control mechanism is constructed as follows. A column support section 8 that supports the tube column column section 3 is screwed into a pole screw 9, and is moved by the pole screw 9 in the longitudinal direction of the bed l. The pole screw 9 is held by bearings to, ti provided at both ends of the pole screw 9, and is attached to the bed l. A pulley 12 is attached to one end of this pole screw 9.
The pulley 13 is attached to a servo motor 15 that generates rotational driving force. The timing belt 14 is connected to the pulley 12. A hook is passed to the pulley 13, and the pole screw 9 is connected to the timing belt 14.
It is rotated by the rotational driving force of a servo motor 15 via pulleys 12 and 13.

On the other hand, the spotting device 4 is separated from the X-ray tube 2 and the tube support 3, and a chain 18 is attached to the spotting device 4, and this chain 18 connects to the subblock 16. The hook is passed to sprocket 17. A pulley 19 is attached to the sprocket 1B, and a belt 21 is passed around the pulley 19 and pulley 20. The speed reducer 22 slows down the rotational driving force. A pulley 24 is attached to the servo motor 2B, and a pulley 23 is attached to the reduction gear 22. A belt 25 is passed around the pulleys 23 and 24. Therefore, the spotting device 4 receives the driving force of the servo motor 26 and moves in the longitudinal direction A of the bed 1 so as to face the rotation center 01 as a supporting axis as the X-ray tube 2 moves. Note that the servo motor 2B is provided with a speed detector (speed detector) and an encoder (position detector).

FIG. 5 is a diagram showing an embodiment of the rotation mechanism of the X-ray tube 2. As shown in FIG. The X-ray tube 2 is mounted on a tube mounting plate 27, which is held by the bearing 28 and the electromagnetic brake 29. The electromagnetic brake 29 is a coupling 30
It is connected to the speed reducer 31 via.

A pulley 32 is attached to the reducer 31, and a pulley 34 is attached to the servo motor 35. A belt 33 is passed around the pulleys 32 and 34. Therefore, the X-ray tube 2 is rotated by the servo motor 35.

Next, the operation of the embodiment configured as described above will be explained. First, when X-ray tomography is performed as shown in FIG. 4, the rotational driving force of the servo motor 15 is applied to the pulley 13. belt 14
．． The force is transmitted to the pole screw 9 via the pulley 12, and in conjunction with this, the column support portion 8 moves in the longitudinal direction A of the bed 1, that is, in the left direction.

Further, as shown in FIG. 5, the rotational driving force of the servo motor 35 is applied to the pulley 34. Belt 33. Reducer 3 via pulley 32
1. The rotational driving force is reduced by the reduction gear 31 and controlled by the electromagnetic brake 29 via the coupling 30. Further, the rotational driving force is transmitted to the tube mounting plate 27 via the bearing 28, and as the X-ray tube 2 moves in the longitudinal direction of the tube support 3, the rotation center 02 of the tube support 3 Angle θ in the counterclockwise direction with
only rotates.

On the other hand, as shown in FIG. 4, the rotational driving force of the servo motor 2B is applied to the pulley 24. Belt 25. The signal is transmitted to the reduction gear 22 via the pulley 23. The rotational driving force is reduced by this speed reducer 22, and the belt 21. The rotational driving force is transmitted to the sprocket 17 via the pulley 19, and the rotational driving force is transmitted to the spotting device 4 via the chain 18.

Then, as the X-ray tube 2 moves about the rotation center O1, the spot device 4 moves in the longitudinal direction A of the bed, that is, in the right direction, so as to face the X-ray tube 2.

According to this embodiment, when performing oblique imaging or tomography, as the X-ray tube 2 is moved around the rotation center Of by the control mechanism, the X-ray tube 2 is is rotated about the rotation center 02 of the
the spotting device 4 is moved in parallel so as to face the wire tube 2;
It is rotated and X-ray photography is performed. Therefore, there is no need to provide separate rotation mechanisms or movement mechanisms, and the configuration is simple and the device can be made smaller and lighter.
Fluoroscopic imaging such as oblique entry or tomography can be easily performed. Furthermore, as shown in FIG. 2, the X-ray tube 2 can be rotated by angles of 90" and 180" for chest radiography, for example, so that stretcher radiography and chest stand radiography can be performed, and film changer radiography as shown in FIG. 3 can be easily performed. can be used for multipurpose diagnosis. Furthermore, by separating the spotting device 4 and the tube support portion 3, the operability for retracting the spotting device 4 is improved, and diagnostic efficiency can be improved.

Note that the present invention is not limited to the embodiments described above, and it goes without saying that various modifications can be made without departing from the gist of the present invention.

[Effects of the Invention] Z According to the present invention, an X-ray source that irradiates X-rays to a subject placed on a bed, a support that mounts and supports this X-ray source,
A spotting device is provided separately from the column and projects an X-ray fluoroscopic image transmitted through the subject, and when performing oblique photography or tomography, the X-ray source is moved around the rotation center 01. Accordingly, the X-ray source is rotated about the rotation center 02 of the support column as a support axis, and the spot device is moved in parallel so as to face the X-ray source. Since there is no need to provide a mechanism or a moving mechanism, the configuration is simple, and the device can be made smaller and lighter, it is possible to easily perform oblique entry or fluoroscopic imaging such as tomography. Also stretcher photography,
It is possible to provide an X-ray fluoroscopic imaging device that can easily perform chest stand imaging and film changer imaging.

[Brief explanation of the drawing]

FIG. 1 is a schematic configuration diagram showing an embodiment of an X-ray fluoroscopic imaging apparatus according to the present invention, FIG. 2 is a diagram showing an apparatus for performing cassette imaging using a stretcher and chest imaging using a chest stand, and FIG. 3 is a diagram showing a film changer. FIG. 4 is a diagram showing a control mechanism for controlling the operation of the X-ray tube and the spot device, and FIG. 5 is a diagram showing an embodiment of the rotation mechanism of the X-ray tube. FIG. 6 is a diagram showing an example of a conventional X-ray fluoroscopic imaging device. 1.51...Bed, 2.52...X-ray tube, 3.53
. . . Tube support section, 4, 54 . . . Spot device, 5.
55...Stretcher, 6...Cassette, 7...
Chest dand, 8... Pillar support part, 9... Pole screw, 10.11°28... Bearing, 22.31
...Reducer, 18.17... Sprocket, 15.
28.35... Servo motor, 14.19.21.2
5゜33...Belt, 12.13.19.2G, 2
3.24.32.34... Pulley, 27... Tube mounting plate, 29... Electromagnetic brake, 30... Coupling. Applicant's agent Patent attorney Takehiko Suzue No. 1 concavity No. 2

Claims (1)

[Claims] an X-ray source that irradiates X-rays to a subject placed on a bed;
A support section for mounting and supporting the X-ray source, a spot device that is provided separately from the support section and that records an X-ray fluoroscopic image transmitted through the subject; Control for moving the X-ray source around a rotation center O1 as a support axis while rotating the X-ray source around a rotation center O2 of the support column and moving the spotting device in parallel so as to face the X-ray source. An X-ray fluoroscopic imaging device characterized by comprising a mechanism.