JPH041624B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to an X-ray film holder conveying device in an X-ray imaging apparatus that performs X-ray imaging using a sheet-like film.

[Technical background of the invention and its problems]

A conventional general X-ray remote fluoroscopy apparatus is configured as shown in FIG. 1, for example. As shown in FIG. 1, the X-ray remote fluoroscopic imaging device is placed inside a bed 1 on which a subject 1A is to lie down, and a bed 1 to emit X-rays toward the subject 1A. An under-type device comprising at least an X-ray tube 2 and an imaging section 3 disposed opposite to the bed 1 with the subject 1A in between, and equipped with an image intensifier (I/I) 4 and a television camera 5. It is a photographic device. And inside the photographing section 3,
The X-ray film holder 6 is installed, and when the imaging unit 3 or the subject 1A is moved while observing the fluoroscopic image on the CPT monitor, and the fluoroscopic image of the desired affected area is obtained, the X-ray film holder is removed. 6 to the X-ray imaging position in the imaging unit 3, and then
It is configured to perform line photography.

The configuration of the imaging section 3 is shown in FIG. 2. The standby position of the X-ray film holder 6 during fluoroscopy must be outside the X-ray irradiation field of the image intensifier (I/I) 4. When photographing, the X-ray film holder 6 is moved in the direction of arrow A, and placed in the X-ray irradiation field, that is, the X-ray photographing position, and photographed. By the way, in order to miniaturize the apparatus, it is necessary to shorten the distance _l1 between the imaging position and the support 3A of the imaging section 3. Therefore, the distance between the imaging position and the X-ray film holder 6
The distance l ₂ from the standby position of will also become shorter. Shortening this distance l ₂ has the effect of enabling high-speed movement because the amount of movement of the X-ray film holder 6 when switching from fluoroscopy to imaging becomes smaller.

However, the X-ray film holder conveying apparatus having the above structure has the following problems. That is, as shown in FIG. 3, the X-rays irradiated from the X-ray tube 2 are attached to the subject 1A and other substances in the X-ray irradiation field, such as the attachment of an image intensifier (I/I) 4. X-ray film holder 6 in a standby position where scattered radiation generated when absorbed by a plate etc.
The X-rays in the X-ray film holder 6
A phenomenon occurs in which the line film 6A is blackened. This phenomenon becomes more noticeable by shortening the distance _l2 . And X-ray film 6
When A becomes black, the image quality of the next photographed film deteriorates, making it difficult to see when diagnosing with X-ray film, which is extremely inconvenient. Furthermore, if the distance l ₂ is increased in order to reduce this phenomenon, there is also the drawback that the device becomes larger.

[Purpose of the invention]

The present invention has been made in view of the above circumstances, and it is possible to reduce the size of the apparatus, prevent the blackening of the X-ray film during fluoroscopy, and make it possible to obtain sharp X-ray images. It is an object of the present invention to provide an X-ray film holder conveying device that can perform the following steps.

[Summary of the invention]

The outline of the present invention for achieving the above object is as follows:
In the wire film holder conveyance device,
The X-ray film holder is provided with an X-ray shielding plate that partitions a space in which the X-ray film holder is stored and an X-ray irradiation field, and a driving means for opening and closing the X-ray shielding plate when moving the X-ray film holder. This is a characteristic feature.

[Embodiments of the invention]

An embodiment of the present invention will be described below with reference to the drawings.

An X-ray film holder conveying apparatus according to an embodiment of the present invention is constructed as shown in FIGS. 4 to 6.

In FIGS. 4 to 6, 3B is the frame housing of the photographing unit 3, and this frame housing 3B
A multi-stage telescopic member, a moving member, an X-ray shielding member, and a driving means are housed inside. The multi-stage telescopic member is configured to removably mount the X-ray film holder 6 and to freely move the X-ray film holder 6 mounted at the X-ray imaging position and the standby position by a telescopic action. The X-ray film holder 6 can be slid along the longitudinal direction of the frame housing 3B by the rails 7 mounted on the frame housing 3B. That is, an X-ray film holder 6 and a guide frame 8 are fixed to the lowest rail of the three-stage rail 7, and a motor 9 is driven under the control of a controller (not shown) to drive a drive sprocket 9A pivotally supported by the motor 9. and driven sprocket 9B
The guide rail 8 slides on the guide rail 11 disposed inside the longitudinally opposing side surfaces of the frame housing 3B via a chain 10 stretched over the frame housing 3B, and the three-stage rail 7 expands and contracts. do.

The moving member allows the three-stage rail 7, ie, the X-ray film holder 6, to be moved along the width direction of the frame housing 3B from the standby position. In other words, the top rail of the three-tier rail 7 is the fixed rail 1.
2, the motor 13 is driven under the control of a controller (not shown), and the chain 14 is driven by the motor 13 via a power transmission mechanism 13A that changes the transmission direction of the power of the motor 13.
This causes the uppermost rail to slide on the fixed rail 12, thereby moving the X-ray film holder 6 along the lateral direction of the frame housing 3B.

The X-ray shielding member prevents the X-ray film holder 6 in the standby position from absorbing the scattered radiation caused by the X-rays. That is, the X-ray shielding plate 15 separates the X-ray film holder 6 from the space that houses the X-ray film holder 6 during fluoroscopy.
It is erected at a position that partitions the radiation field with its four corners abutting the inside of the frame housing 3B. Note that, except for the position of the X-ray shielding plate 15 in the space housing the X-ray film holder 6, there is a box-shaped X-ray shielding plate 1.
You can also paste 5A.

The driving means is for opening and closing the X-ray shielding plate 15 when moving the X-ray film holder 6, and is a solenoid 16 that rotates according to the direction of the flowing current under the control of a controller (not shown).
A first arm 17 has one end connected to the central axis of the solenoid 16, and one end is rotatably connected to the other end of the first arm 17, and the other end is hinged to the X-ray shielding plate 15. second arm 18
In order to make the X-ray shielding plate 15 rotatable, the X-ray shielding plate 15 is provided with a hinge 19 pivotally attached to the upper part of the X-ray shielding plate 15 and inside the upper surface of the foot housing 3B.

The operation of the present invention constructed as described above will be described.

First, as shown in FIGS. 4 and 5, the X-ray film holder 6 is placed in a standby position so that fluoroscopy is possible. At this time, the X-ray shielding plate 15 is installed upright at a position that partitions the space in which the X-ray film holder 6 is housed and the X-ray irradiation field, so that scattered rays do not enter this space. Further, by pasting X-ray shielding plates 15A in a box-like shape in this space, scattered rays passing through the frame housing 3B can be blocked.

Next, while observing the fluoroscopic image on the CRT monitor, the imaging unit 3 or the patient 1A is moved to obtain a fluoroscopic image of the desired affected area.When a controller (not shown) is controlled to switch to the imaging mode, first the solenoid 16, the solenoid 16 rotates, and the first arm 17 extends in substantially the same direction as the second arm 18, as shown in FIG. As a result, the X-ray shielding plate 15 is pushed in the direction of arrow B, and the hinge 19 rotates, so that the X-ray shielding plate 15
5 is opened, and the X-ray film holder 6 can be moved to the imaging position. Thereafter, the multistage telescopic member and the movable member slide to place the X-ray film holder 6 at a desired imaging position, and imaging is performed.

Next, after the X-ray film holder 6 returns to the standby position after the completion of imaging, a current flows through the solenoid 16 in the opposite direction to the above-mentioned current direction, and the solenoid 16
The first arm 17 and the second arm are rotated to the position shown in the figure.
Since the arms 18 of are almost overlapped,
The line shield plate 15 is closed.

As described above, in this embodiment, the X-ray shielding plate 15, which can be opened and closed, is erected at a position that partitions the space in which the X-ray film holder 6 is stored and the X-ray irradiation field, and the X-ray shielding plate 15 is closed during fluoroscopy. By keeping
Scattered rays from the subject 1A and other substances in the X-ray irradiation field are absorbed by the X-ray film 6A in the X-ray film holder 6, preventing the film 6A from becoming black. A line image can be obtained. Furthermore, since the distance l ₂ between the photographing position and the standby position can be shortened, the apparatus can be made smaller.

One embodiment of the present invention has been described in detail above, but
The present invention is not limited to the above embodiments,
The invention can be modified and implemented as appropriate within the scope of the gist of the invention.

For example, the X-ray shielding plate in the above embodiment may be an X-ray absorbing material, and the solenoid may be one that rotates under the control of a controller.
A cam mechanism etc. can also be used.

〔Effect of the invention〕

As detailed above, according to the present invention, an X-ray shielding plate that can be opened and closed is provided as a partition between the space in which the X-ray film holder is stored and the X-ray irradiation field, and this shielding plate is closed during fluoroscopy. An X-ray film holder that can prevent the photographic film from being blackened by scattered radiation, shorten the distance between the standby position of the X-ray film holder and the photographing position, and reduce the size of the device. We can provide transport equipment.

Therefore, a sharp X-ray image can be obtained on the photographic film, which is very useful for diagnosis.

[Brief explanation of drawings]

FIG. 1 is a schematic explanatory diagram showing a conventional X-ray imaging device, FIG. 2 is a schematic explanatory diagram showing the imaging section of the device, FIG. 3 is an explanatory diagram showing the state of generation of scattered rays in the device, and FIG. The figure is a schematic top view of an imaging unit showing one embodiment of the present invention, FIG. 5 is a schematic side view showing the transparent mode in the embodiment, and FIG. 6 is a schematic side view showing the radiographing mode in the embodiment. . 3B...Frame housing, 6...X-ray film holder, 6A...X-ray film, 15, 15A...
X-ray shielding plate, 16... solenoid, 17... first
arm, 18...second arm, 19...hinge.

Claims (1)

[Claims] 1 In the X-ray film holder transport device, the space in which the X-ray film holder is stored and the
The X-ray device is characterized by comprising an X-ray shielding plate that partitions the X-ray film holder from the X-ray irradiation field, and a drive means that opens and closes the X-ray shielding plate when moving the X-ray film holder.
Line film holder transport device.