JPH08131426A - Quick photographing device for x-ray radiography board - Google Patents

Abstract

PURPOSE: To perform the switching of quick photographing without performing complicated holder exchange work, etc., by loading a cassette holder on an upper space by locating a freely elevatable film holder at an ascended position in quick photographing of system without cassette and descending it to a standby position in quick photographing of cassette system. CONSTITUTION: A film holder 5 held movably on a carrier rail 9a is equipped with a rotary elevation lever 12 and an ascending/descending inclining lever 14, and also, a spring 3 for ascending/descending lever rotation and a spring for ascending/descending inclining lever which generate a force to always push up the film holder 5 via the levers 12, 14. The film holder 5 is constituted in such a way that it can be ascended/descended and inclined by rotating the levers 12 and 14. In this way, the cassette holder can be loaded on a space opened by descending the film holder 5 to the upper part of the film holder 5 when the quick photographing of system without cassette is switched to the one of cassette system.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a quick-shooting device provided on a medical X-ray fluoroscopic imaging stand, and more particularly to a cassette-less quick-shooting (cassette-free quick-shooting) and a cassette-type quick-shooting (cassette-based quick-shooting). The present invention relates to an improvement of a quick-shooting device capable of both shooting.

[0002]

2. Description of the Related Art At present, a medical X-ray fluoroscopic imaging table is used for 50 to 100 pieces of non-imaging X-ray film at a time in order to improve the examination rate.
Those equipped with a so-called cassette-less type quick-shooting device capable of loading one sheet have become widespread.

FIG. 4 is a view showing such an X-ray fluoroscopic imaging table from the front side. The cassette-less type rapid copying apparatus 1 is provided with a four-section film (10 ″ × 12 ″) supply magazine 2,
Large-angle film (14 "x 14") supply magazine 3 and film storage magazine 4 for storing X-ray film after photography
Is installed. Also, large angle film supply magazine 3
Instead of this, it is also possible to mount a large four-section film (11 ″ × 14 ″) supply magazine (not shown).

FIG. 5 is a diagram showing a film moving path and a film holder moving path in the inside of the X-ray fluoroscopic imaging table quick-shooting apparatus 1 shown in FIG. 4, and FIG. 5 is used together to move the film during X-ray film photographing. Will be explained. When performing X-ray film radiography on the fluoroscopic imaging stand shown in FIG. 4, one film F1 from the selected film supply magazine 2 or 3, the film supply magazine 2 in the illustrated example, is transferred by a film transport mechanism (not shown). It is conveyed to the film holder 5. The film holder 5 is provided with intensifying screens that increase the X-ray fluorescence action so as to face each other, and the film F1 is transported and held during this time.

Then, while observing a fluoroscopic image using the X-ray fluorescence multiplier (II) 6 on the monitor in the operation room via the X-ray television 7, the fluoroscopic imaging table is moved to position the imaging site of the subject 8. I do.

During the observation of the fluoroscopic image, the film holder 5
Is in a standby state outside the X-ray irradiation range, which is a position where the film F1 is not covered by X-rays (position A in the drawing), and is moved to a photographing position (position B in the drawing) in the X-ray irradiation range by a photographing command, and X The line is photographed. After filming, the film holder 5 returns to the original position, and the filmed film F2 is transported into the storage magazine 4 by the film transport mechanism.

In the cassette-less X-ray fluoroscopic imaging table described above, the large-angle film is the largest in most apparatuses at present. However, there are cases where it is necessary to take a large area such as a large intestine image or an image of the entire urinary system. In such a case, in order to make it possible to take an image with a half-section film (14 "x 17"), the conventional The X-ray fluoroscopy platform quick-shooting device is compatible with the use of a cassette.

Further, like the X-ray film, a stimulable phosphor sheet capable of digital image processing, which is used for X-ray photography (imaging plate: hereinafter referred to as IP).
In order to make it possible to perform radiography at the same time, the conventional X-ray fluoroscopic imaging table quick-shooting device is compatible with the use of an IP cassette.

FIG. 7 is a perspective view showing a main part of a conventional X-ray fluoroscopy platform quick-shooting device which can also be used as a cassette (capable of quick-shooting in a cassette system), and is moved between a shooting position and a standby position. The carrier 9 and the film holder 5 movably supported on the carrier rail 9a provided on the carrier 9 and the supporting portion thereof are shown in an extracted manner. For quick photography using the cassette 11 with this structure, the film holder 5 is removed from the quick photography device, and the cassette holder 10a is inserted on the carrier rail 9a instead, and the cassette 11 is removed.
Is loaded in the cassette holder 10a.

As another conventional apparatus, as shown in FIG. 8, a rail 9a provided with two upper and lower rail portions 9a1 and 9a2 is provided on a carrier 9 which moves between a photographing position and a standby position. , The lower rail portion 9a1 is used as a rail for the film holder 5, and the upper rail portion 9a2 is used as a rail for the cassette holder 10a.
There is one that allows both cassette-type quick-shooting and cassette-type quick-shooting without the need to replace 0a.

[0011]

The above-mentioned prior art has the following problems. That is, in the case of X-ray photography, the actual X-ray focal point has an area of about 0.5 mm 2 to 1 mm 2, which causes a penumbra (blurring) to appear on the film surface, so that the subject and the film are not visible. The condition for obtaining a photograph with high sharpness is to bring the surfaces as close as possible to reduce the enlargement ratio and the penumbra. However, in the structure shown in FIG. 8, since the space for loading the cassette 11 is provided from the beginning on the upper part of the film holder 5, the distance between the upper surface of the quick-shooting device 1 and the film surface is large in the case of the cassette telephoto shooting. turn into. This means that the distance between the subject and the film surface also increases correspondingly, which reduces sharpness and results in high image quality.
The line image (photo) cannot be obtained.

In the structure shown in FIG. 7, the film holder 5 and the cassette holder 10a need to be exchanged on the carrier rail 9a in order to switch from the cassette telephoto mode to the cassette mode radio, which complicates the work.
Further, there is a problem that it is always necessary to keep either of the removed holders 5 or 10a at hand.

An object of the present invention is to obtain a high-quality X-ray image (photograph) in both cassette-type rapid photography and cassette-type rapid photography, and when switching the rapid photography between the two types. Another object of the present invention is to provide an X-ray fluoroscopic imaging platform quick-shooting device that can be operated without complicated operations such as holder replacement operations.

[0014]

SUMMARY OF THE INVENTION The above-mentioned object is to carry out both cassette-type rapid shooting using a film holder which holds an X-ray film and moves between a shooting position and a standby position and a cassette-type rapid shooting using a cassette. In an X-ray fluoroscopy stand quick-shooting device capable of moving up and down, the film holder can be moved up and down, and the film holder is positioned at an elevated position during cassette-type quick-shooting and lowered at a standby position during cassette-type quick-shooting. This can be achieved by providing a cassette holder that can be loaded in the space and providing means for always keeping the distance between the subject and the film surface at the photographing position to a minimum.

[0015]

In the case of the cassette-letter type rapid photography for projecting an X-ray image on the film held in the film holder, the distance between the object and the film surface is minimized by the film holder pushed up by the spring force and the like. To At this time, since there are no parts on the upper surface of the film holder, there is no contact with the inner wall of the upper surface of the quick-shooting device.

In the case of the cassette type quick shooting, the film holder is lowered at the standby position without removing the film holder, a space for loading the cassette holder is secured above the film holder, and the cassette holder is placed above the film holder. Load it. When shooting, the distance between the cassette attached to the cassette holder and the top of the quick-shooting device is minimized, that is, keeping the same height as the film when shooting in the cassette-less system, and the carrier moves to the shooting position in response to a shooting command. Then, shooting is performed.

As a result, the cassette-less system quick-shooting photography,
In any case of the cassette type quick shooting, the distance between the subject and the film surface can be kept to a minimum, and a high quality X-ray image (photograph) can be obtained. Further, both cassette-type rapid shooting and cassette-type rapid shooting can be performed without the need to replace the holder, which improves workability.

[0018]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a perspective view showing a main part of an embodiment of an X-ray fluoroscopic imaging table photographing apparatus according to the present invention, and schematically shows an entire film holder part including a lever for raising and lowering a film holder and a spring. There is.

As shown, in the apparatus of the present invention, the film holder 5 movably held on the carrier rail 9a.
Includes a pair of left and right rotatable lift levers 12 and lift / tilt levers 14, respectively.
It has a structure having an elevating lever rotating spring 13 and a lifting and tilting lever rotating spring 15 that constantly generate a force to push up the film holder 5 via 2 and 14. And
The film holder 5 can be raised and lowered and tilted by rotating the lever 12 and the lever 14.

The necessity of raising and lowering the film holder 5 will be described with reference to FIGS. In the conventional device, as described above, the film follows the moving path as shown in FIG. However, it is necessary to change the position in the height direction of the film holder 5 for replacing the film in the film holder 5 and the position in the height direction of the film holder 5 at the photographing position. That is, in FIG. 6, since the film holder 5 is held by the carrier rail 9a so as to be movable in the vertical direction (horizontal direction in the figure), the components for loading and unloading the film in the film holder 5 are arranged in the height direction in the carrier rail. It is necessary to place it in a position where it does not collide with 9a,
Along with this, it is necessary to lower and tilt the film holder 5 to the position of the component for loading and unloading the film. In addition, a cassette holder must be loaded in order to minimize the distance between the subject and the film surface in the cassette at the time of rapid shooting with the cassette method, and a space is provided above the film holder 5 at a standby position for loading the cassette holder. Need to open.

FIG. 2 is a perspective view showing a state where the film holder portion shown in FIG. 1 is different from the state shown in FIG. 1, that is, the film holder portion when the cassette is loaded at the standby position in the cassette type quick photographing. Now, this will be described below.

When switching from the cassette-type quick-shooting to the cassette-type quick-shooting, by selecting the cassette use mode, the lifting lever rotating cam 16 and the lifting / tilting lever rotating cam 17 mounted on the rapid-shooting device are selected.
Then, the elevating lever 12 and the elevating / inclining lever 14 are brought into contact with each other and rotated, so that the film holder 5 is kept in the standby position in a state of being lowered from the position of the film holder 5 in the cassette-less rapid shooting shown in FIG. As a result, the cassette holder can be loaded in the space opened by lowering the film holder 5 above the film holder 5.
It is possible to connect the cassette holder to the.

Here, by pressing the cassette holder against the upper surface of the carrier rail 9a (see FIG. 1), the film holder 5 is moved from the cassette loading position to the standby position, and the cam 16 and the cam 17 move the lever 12 and the lever 14. The cassette holder can always maintain the same height even if the force of pushing up the film holder 5 by the springs 13 and 15 is exerted. That is, the distance from the top surface of the quick-shooting device to the film surface is the same in both the cassette-letter rapid shooting and the cassette-type rapid shooting, in other words, in both cases, the film surface can be brought closest to the subject.

FIG. 3 is a perspective view showing the state of the film holder portion when the film is exchanged during the cassette-less rapid shooting, which will be described below. As shown in FIG. 5, since there is a component (not shown) for loading and unloading the film in the film holder 5 below the standby position in the lateral movement direction, the film holder 5 is inclined as shown in FIG. There is a need. When the film is replaced, the lever 14 is further rotated by the cam 17 by moving further forward than the position where the cassette holder is loaded. In this way, the film holder 5 has its state determined by the lever 12 and the lever 14, and the cam 16 and the cam 17, and the stable exchange of the film becomes possible.

As described above, the apparatus of the present invention has a structure in which the cassette holder 10 is added and loaded on the upper part of the film holder 5 in the case of performing the cassette type rapid photographing, and also performs the cassette telescopic type rapid photographing. In this case, since the film holder 5 has a mechanism for raising it, the distance between the subject and the film surface can be always kept to the minimum.

[0026]

As described above, according to the present invention, in a quick-shooting apparatus capable of both cassette-type rapid shooting and cassette-type rapid shooting, the distance between the object and the film surface becomes large in either shooting. Since it does not occur (can be kept to a minimum), it is possible to obtain a high-quality X-ray radiographic image with a small magnification and a high sharpness. In addition, when switching between the cassette-type quick-shooting and the cassette-type quick-shooting, it can be performed without complicated operations such as holder exchange operation.
There are effects such as high operability.

[Brief description of drawings]

FIG. 1 is a perspective view showing a main part of an embodiment of a device of the present invention.

FIG. 2 is a perspective view showing the film holder portion shown in FIG. 1 in a state different from the state shown in FIG.

FIG. 3 is a perspective view showing the film holder portion shown in FIG. 1 in a state different from the state shown in FIG.

FIG. 4 is a front view of a general medical X-ray fluoroscopic imaging table equipped with a cassette-less type rapid photographing apparatus.

5 is a diagram showing a film moving path and a film holder moving path inside the quick-shooting device in FIG.

FIG. 6 is a partial plan view of FIG.

FIG. 7 is a perspective view showing a main part of a conventional device that enables cassette type quick shooting.

FIG. 8 is a perspective view showing a main part of a conventional apparatus capable of performing a quick-shooting cassette method having a structure different from that of FIG.

[Explanation of symbols]

 1 Casetteres type quick-shooting device 2 Four-section film supply magazine 3 Large-angle film supply magazine 4 Film storage magazine after filming 5 Film holder 6 X-ray fluorescence multiplier (II) 7 X-ray TV 8 Subject 9 Carrier 9a Carrier rail 9a1 Lower rail Part 9a2 Upper rail part 10a Cassette holder 11 Cassette 12 Lifting lever 13 Lifting lever rotating spring 14 Lifting and tilting lever 15 Lifting and tilting lever rotating spring 16 Lifting lever rotating cam 17 Lifting and tilting lever rotating cam

Claims (1)

[Claims] 1. An X-ray fluoroscopic imaging stand capable of both cassette-type rapid shooting using a film holder that holds an X-ray film and moving between a shooting position and a standby position and a cassette-type rapid shooting using a cassette. In a quick-shooting device,
The film holder can be moved up and down, the film holder is positioned in the raised position during cassette-type rapid shooting, and is lowered at the standby position during cassette-type rapid shooting so that the cassette holder can be loaded into the upper space of the cassette holder at the shooting position. And a means for keeping the distance between the subject and the film to a minimum at all times.