JPH0784328A - Quick photographing device for fluoroscopic photographing head - Google Patents

Abstract

PURPOSE:To provide a quick photographing device for a fluoroscopic head easy to switch between cassetteless system quick photographing and cassette system quick photographing and keeping an enlargement ratio in either system small so as to obtain an X-ray photograph of high image quality. CONSTITUTION:A rail 12 for fitting a cassette holder 10 only at the time of cassette system photographing is provided at the upper part of a film holder 5. Two guide grooves 15a, 15b different in height are provided to guide the rollers 14 of a carrier 9 for supporting the film holder 5, and a lever 16 is provided to switch the guide grooves 15a, 15b according to cassetteless system photographing and cassette system photographing so as to keep the distance between a detected body and the film face to the required minimum in either 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 an X-ray suitable for carrying out both cassette-type quick-shooting and cassette-type quick-shooting.
The present invention relates to a quick-shooting device for a fluoroscopic imaging stand.

[0002]

2. Description of the Related Art A conventional X-ray fluoroscopic imaging stand and a quick-shooting apparatus for the X-ray fluoroscopic imaging stand will be described with reference to FIGS. 2. Description of the Related Art Conventionally, particularly the present X-ray fluoroscopic imaging stand is widely used, which is equipped with a so-called cassette terre type quick-shooting device capable of loading 50 to 100 non-imaging films at one time in order to improve examination efficiency.

FIG. 5 is an overall front view showing an example of an X-ray fluoroscopic imaging table equipped with a conventional cassette telegraphing device. In FIG. 5, the X-ray fluoroscopic imaging stand includes an X-ray tube device 20, an X-ray variable diaphragm 21, an X-ray fluoroscopic imaging stand table (top plate) 30 and a table (top plate) support portion of the X-ray fluoroscopic imaging stand body. 31 and the cassette-less type quick-shooting device 1 and I.I. I.
An (X-ray fluorescence multiplier) 6 and an X-ray TV 7 are provided.
In addition, the cassette-less system quick-shooting device 1 is a four-section (10 ")
X12 ") film supply magazine 2, large angle (14" x1)
4 ") film supply magazine 3 and photographed film storage magazine 4 are installed, and it is also possible to install a large four-section (11" x 14 ") film supply magazine instead of the large angle film supply magazine 3. This is a cassette-less type quick-shooting device that can be used with 3 size films.
In order to align the X-ray center with the X-ray center, the inside of the table support 31 can be moved in the vertical direction (the head-and-foot direction of the subject 8).

When photographing with this X-ray fluoroscopic imaging table, first, one of the selected three size films of the cassette-less type quick-shooting device 1 is fed from one of the film supply magazines 2 and 3. The film is conveyed to a film holder 5 on the upper part of the quick-photographing device by an appropriate film conveying mechanism (not shown). The film holder 5 is provided with two intensifying screens (not shown) for increasing X-ray fluorescence. , The film 5a is conveyed and held during this time. Then I. I. X-ray fluoroscopic image obtained by using
The X-ray fluoroscopic imaging table (top plate) 3 while monitoring the X-ray TV monitor in the operation room (not shown) via the X-ray TV
0 is moved to position the imaging region of the subject 8, and the film holder 5 uses the X-ray tube device 20 and the X-ray variable diaphragm 21 to move the X-ray film 5a outside the X-ray irradiation range during observation of the fluoroscopic image. Is in the standby state at the standby position A where X-rays do not cover. Next, at the time of shooting, the film holder 5 is moved to the shooting position B in the X-ray irradiation range by a shooting command and X-ray shooting is performed. Then, after shooting, the film holder 5 returns to the original standby position A again and the film 5a which has been shot is transported. It is conveyed into the film storage magazine 4 by the mechanism.

In the X-ray fluoroscopic imaging stand provided with the cassette-less type rapid photographing device described above, most of the cassette-less type rapid photographing devices 1 currently have a large-angle (14 ".times.14") film as the maximum size. However, there are cases in which wide area imaging such as large intestine imaging of the subject 8 and entire urinary tract imaging is necessary. In such a case, in order to enable imaging with a half-cut (14 "x 17") film, This is supported by enabling quick shooting using a cassette. Also, when using a stimulable phosphor sheet (imaging plate: described as IP) that can be used for X-ray photography as with the X-ray film, it is possible to support by using the IP cassette. ing. A conventional quick-shooting device 1 including these cases will be described below with reference to FIGS. 6 to 8.

FIG. 6 is an internal front view of the upper part of the quick-shooting device showing the film holder support portion of the cassette-less quick-shooting device shown in FIG. 6. In FIG. 6, the film holder 5 of the cassette-less quick-shooting device 1 and its film holder are shown. The structure of the support portion is such that the film holder 5 vertically moves between the standby position A and the photographing position B in FIG. 5 along the vertically moving rail 9c via the roller 9b, and the carrier rail 9a provided on this carrier 9. This is a structure for supporting the film holder 5 so as to be able to move laterally above.

FIG. 7 is a front view of the inside of the upper part of the quick-shooting device showing an example of the cassette holder supporting portion of the cassette-less quick-shooting device shown in FIG. In FIG. 7, the structure of the cassette holder 10a and the cassette holder supporting portion of the cassette telephoto copying apparatus 1 is the same as that of the film holder 5 in the case of performing the quick photographing using the cassette in the structure of the film holder supporting portion of FIG. After removing from the carrier rail 9a of the quick-shooting apparatus 1, as shown in FIG.
0a is inserted on the carrier rail 9a, and the cassette 11 is loaded in the cassette holder 10a to perform photographing.

FIG. 8 is a front view of the inside of the upper part of the quick-shooting device showing another example of the cassette holder support portion of the cassette-less quick-shooting device shown in FIG. 8, the structure of the cassette holder 10b and the cassette holder supporting portion of this cassette telephotographing device is such that the cassette 11 is preliminarily loaded on the upper portion of the film holder 5 supported by the structure of the film holder supporting portion of FIG. This is a structure in which the cassette holder supporting plate 9d provided on the carrier 9 supports the cassette holder 10b with the central portions of the upper surface and the lower surface being vacant. This structure is shown in FIGS.
Unlike the above, it is also possible to carry out quick shooting using a cassette without removing the film holder 5.

[0009]

In the prior art described above, in the quick-shooting device of the film holder and cassette holder supporting structure shown in FIGS. 6 and 7, the film holder and the cassette holder are used to switch from the cassette-less quick-shooting device to the cassette-type shooting. Since it is necessary to replace the holder on the carrier rail, the replacement operation becomes complicated, and there is a problem that it is necessary to store either of the removed holders at hand.

Further, in the quick-shooting device having the film holder / cassette holder supporting structure shown in FIG. 8, the exchange operation on the carrier rail shown in FIGS. 6 and 7 is unnecessary, but the cassette holder for loading the cassette on the upper portion of the film holder is not required. Since the space is set from the beginning, the distance between the upper surface of the quick-shooting device and the film surface becomes large in the case of the cassette-less system quick-shooting, so that the distance between the subject and the film surface also increases accordingly. Here the actual X-ray focus in the case of X-ray imaging has a 0.5 mm ² ~ 1 mm ² approximately of the area, thereby for penumbra (blur) appears on the film surface, the object and the film It is a condition to obtain an X-ray photograph with high sharpness that the surfaces are made as close as possible to reduce the enlargement ratio and the penumbra. Therefore, the quick-shooting apparatus shown in FIG. 8 has a problem in that it has one of the basic performances of the X-ray fluoroscopic imaging table, that is, it has an adverse effect of increasing the enlargement ratio and lowering the sharpness to deteriorate the image quality.

An object of the present invention is to solve the above-mentioned problems of the prior art, and in a quick-shooting apparatus capable of performing both cassette-type quick-shooting and cassette-type quick-shooting of an X-ray fluoroscopic imaging stand, no complicated operation is required and the cassette is not required. Provided is a quick-shooting device for an X-ray fluoroscopic imaging table, which can easily perform switching operation between the radiography system and the cassette-type quick-shooting device, and which can prevent an increase in enlargement ratio by both types and can obtain a high-quality X-ray photograph. Especially.

[0012]

SUMMARY OF THE INVENTION The above-mentioned object is to hold a film at a shooting standby position in a cassette standby type rapid shooting apparatus in an X-ray fluoroscopic imaging stand rapid shooting apparatus capable of both cassette type rapid shooting and cassette type rapid shooting. The cassette holder that can be used by loading the cassette only when shooting in the rapid mode is attached to the upper part of the film holder that is used as a detachable structure, and the film holder is mounted on the upper part from the shooting standby position to the shooting position. With respect to the operation of the moving carrier, it is achieved by providing a switching structure for switching the distance between the upper surface of the quick-shooting device and the carrier at the shooting position in two stages, during the cassette-letter rapid shooting and the cassette-based rapid shooting.

[0013]

In the case of the cassette-less type rapid photographing in which the X-ray image of the subject is photographed by the film held in the film holder, the rapid photographing device for the X-ray fluoroscopic photographing table is arranged at the photographing position and the carrier at the photographing position. , But the distance between the subject and the film surface is minimized, but at this time, there is no part above the film holder, so there is nothing that comes into contact with the top surface of the quick-shooting device. Further, in the case of the cassette type quick shooting, the cassette holder is attached to the upper part of the film holder without removing the film holder from the carrier at the shooting standby position. At this time, the distance between the cassette loaded in the cassette holder and the top of the quick shooting device is increased. The position is set to the minimum position, and the movement of the carrier to the photographing position is performed by switching the movement guide of the carrier so as to move in parallel with the upper surface of the quick-shooting device in all steps. As a result, the operation of exchanging the film holder and the cassette holder is unnecessary, and in any of the methods, the distance between the subject and the film surface is kept to a minimum, and a high-quality X-ray image having high sharpness can be obtained.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT An embodiment of the present invention will be described below with reference to FIGS. FIG. 1 is a front view of the inside of an upper portion of a quick-shooting apparatus showing an embodiment of an X-ray fluoroscopic imaging stand according to the present invention, and FIG. 2 is a quick-shooting apparatus showing an embodiment of an X-ray fluoroscopic imaging stand according to the present invention. FIG. 3 is a right side view of a portion inside the upper portion, FIG. 3 is a detailed front view of the switching portion of the guide groove of FIGS. 1 and 2, and FIG.
FIG. 2 is a partial plan view of the inside of the upper part of the quick-shooting device showing an embodiment of the quick-shooting device for the fluoroscopic imaging stand.

In FIG. 1, the carrier 9 in FIG. 1 is in the imaging standby position A in the upper portion of the quick-shooting device 1 of the X-ray fluoroscopic imaging table in FIG. 5, and can move laterally on the carrier rail 9a provided on the carrier 9. The film holder 5 is held on the film holder 5, and rails 12 for supporting the cassette holder 10 are attached to both side surfaces of the film holder 5, whereby the film holder 5 is guided through the guides 13 fixed to the cassette holder 10. The cassette holder 10 is supported on the upper part of the.
When the carrier 9 is vertically moved from the standby position A to the photographing position B, the roller 14 attached to the carrier 9 is moved by the guide plate 1.
The guide levers 15a and 15b having different heights are provided so as to move along the guide grooves 15a and 15b of the switching lever 16 provided at the branch point of the front guide grooves 15a and 15b at the photographing position B. A mechanism for switching between moving the carrier 9 along the high guide groove 15a to the photographing position B or the low guide groove 15b by the rotational movement of the support shaft 20 around the support shaft 20 as illustrated. Is provided. 1 shows a holder connecting fitting 21 for connecting the film holder 5 and the lateral movement frame 22 shown in FIG.

In FIG. 2, the right side view of FIG. 1 shows the cassette holder 10, the cassette 11 and the guide 13 without showing them, and the switching operation of the lever 16 of FIG. 1 is performed by the rotary solenoid 17 of FIG. Done. still,
FIG. 2 shows a holder connecting fitting 21 for connecting the film holder 5 and the lateral movement frame 22, and a vertical movement chain 23.
The carrier connecting fitting 24 for connecting the carrier 9 with the chain connecting portion 24a of the carrier 9 is shown.

In FIG. 3, the guide grooves 15a and 1 of FIG.
The details of the switching portion of 5b are shown, and the switching lever 1
The horizontal position 6 indicated by the solid line is the position where the rotary solenoid 17 is operated as the support shaft 20, and when the carrier 9 of FIG. 1 is moved from the standby position A to the photographing position B in this state, the carrier 9 is moved to the carrier 9. The provided roller 14 is guided by the lever 16 and moves along the low guide groove 15b side of the guide plate 15 to reach the photographing position B. Further, when the rotary solenoid 17 is opened, the switching lever 16 as the support shaft 20 is rotationally moved by the tension coil spring 19 to the position indicated by the chain double-dashed line corresponding to the stopper 18, and this time, in this state, the cassette holder 10 shown in FIG. When the carrier 9 from which is removed is moved from the standby position A to the shooting position B,
The roller 14 of the carrier 9 is guided by the lever 16 and moves along the side of the high guide groove 15a to reach the photographing position B.

In FIG. 4, the plan views of FIGS. 1 and 2 show the cassette holder 10, the cassette 11 and the guide 13 without showing them. The film holder 5 is moved vertically by a sprocket 25 for vertical movement and a chain 23. 2 and the chain connecting portion 24a of the carrier 9 shown in FIG. 2 are connected by the carrier connecting fittings 24, whereby the carrier 9 on which the cassette holder 10 is mounted with the detachable film holder 5 is Is guided by the switching lever 16 by the rotary solenoid 17 via the guide plate 1
5 along the guide grooves 15a and 15b of FIG. 1 in the vertical direction. Further, the lateral movement of the film holder 5 is connected at one end by the lateral movement sprocket 29 and the drive system of the chain 28 by the rotation of a lateral movement motor (not shown) and the lateral movement chain 28 and the chain connecting portion 31. As the lateral movement frame 22 provided with the rollers 27 for sandwiching the lateral movement rail 26 at the other end moves laterally under the guidance of the lateral movement guide rod 30 and the lateral movement rail 26, the lateral movement rail of this drive system. Since 26 and the film holder 5 are connected by the holder connecting fitting 21, the film holder 5 moves laterally on the carrier rail 9 a of the carrier 9.

1 to 4, as shown in FIG.
Guide grooves 15a having different heights on the guide plate 15 of
The X-ray imaging position B of the carrier 9 having the film holder 5 on which the cassette holder 10 is detachably mounted on the carrier rail 9a by the movement of the switching lever 15b and the switching lever 16.
Provided is a mechanism capable of switching the height at two levels. With this mechanism, the carrier 9 is imaged from the standby position A along the high guide groove 15a in order to bring the carrier 9 closer to the upper surface of the quick-shooting device 1 of FIG. The movement to the position B is the case of the cassette-less type quick photography in which the film 5a is held and photographed by the film holder 5 of the rapid photography apparatus 1 of the X-ray fluoroscopic imaging stand. In this case, the cassette holder 10 shown in FIG. Since the cassette 11 and the guide 13 are removed, there is nothing on the upper portion of the film holder 5 and there is nothing that comes into contact with the inner wall of the upper surface of the quick-copying apparatus 1, and thus the film held by the film holder 5 is not present. 5a comes closest to the subject 8.

Next, the X-ray fluoroscopic imaging stand shown in FIG.
In the case of performing the cassette type quick-shooting device using the cassette, the carrier 9 is at the shooting standby position A as shown in FIG. 1 and both sides of the film holder 5 are not removed from the carrier 9 without removing the film holder 5. Cassette holder 10 via a guide 13 to a rail 12 mounted on the surface
, And the cassette 11 is loaded in the cassette holder 10 arranged above the film holder 5. Then, in this state, when performing the cassette type rapid copying apparatus using the cassette 11, the solenoid 17 is operated to operate the lever 1
6 is switched to move the carrier 9 along the low guide groove 15b this time, and the low guide groove 15b is kept parallel to the upper surface of the quick-shooting device 1 in the vertical direction from the standby position A to the shooting position B in the entire process. As shown in FIG. 1, since the cassette 11 loaded in the cassette holder 10 moves from the standby position A to the shooting position B while keeping the position close to the upper surface of the quick-shooting apparatus 1, the object 8 and the cassette holder are also in this case. The distance to the film surface in the cassette 11 held by 10 is kept to a necessary minimum. In this way, in the case of cassette quick shooting, as opposed to cassette quick shooting,
With the structure in which the cassette holder 10 is additionally attached to the upper part of the film holder 5 on the carrier 9, and the height of the carrier 9 at the X-ray imaging position B can be switched in two steps, both types are always available. It is possible to keep the subject 8 and the film surface to a minimum, and thus it is possible to obtain a high-quality X-ray photograph with a small magnification and a high sharpness.

In the embodiment shown in FIG. 1 to FIG. 4, in the X-ray fluoroscopic imaging stand quick-shooting apparatus capable of performing both the cassette-type rapid shooting and the cassette-type rapid shooting, the film holder mounted on the carrier at the shooting standby position. In the upper part of the cassette system, the cassette holder is detachably attached for rapid shooting, and at the shooting position, the height of the carrier is switched between two levels to keep the distance between the top of the rapid shooting device and the film surface to a minimum for both types. However, the present invention is not limited to this, and instead of the mechanism for switching and moving both the film holder and the carrier of this embodiment up and down, for example, only the film holder is moved up and down on the carrier. Another mechanism is also conceivable in which the height of the film holder is made variable by providing a mechanism for switching and moving it downward.

[0022]

According to the present invention, in a quick-shooting device capable of both cassette-type rapid shooting and cassette-type rapid shooting on an X-ray fluoroscopic stand, switching between both rapid-shooting operations does not require a complicated operation. Since the distance between the subject and the film surface can be kept to a minimum regardless of which type of rapid shooting is possible, it is possible to obtain a high-quality X-ray image with a small magnification and high sharpness. There is an effect that can be.

[Brief description of drawings]

FIG. 1 is a partial internal front view of an embodiment of an X-ray fluoroscopic imaging platform quick-shooting apparatus of the present invention.

FIG. 2 is a partial right side view of FIG.

FIG. 3 is a detailed front view of a switching portion of the guide groove of FIG.

FIG. 4 is a partial plan view of FIG.

FIG. 5 is a front view of an example of a conventional X-ray fluoroscopic imaging table.

FIG. 6 is a front view of a film holder support portion of a conventional quick-shooting device.

FIG. 7 is a front view of the cassette holder support portion of FIG.

FIG. 8 is another front view of the cassette holder support portion of FIG.

[Explanation of symbols]

 1 quick-shooting device 2 four-section supply magazine 3 large-angle supply magazine 4 storage magazine 5 film holder 6 I. I. 7 X-ray TV 8 Subject 9 Carrier 10 Cassette Holder 11 Cassette 12 Rail 13 Guide 14 Roller 15 Guide Plate 15a Guide Groove 15b Guide Groove 16 Lever 17 Rotary Solenoid 18 Stopper 19 Tension Coil Spring

Claims (1)

[Claims] 1. A rapid-shooting device of an X-ray fluoroscopic imaging stand capable of performing both cassette-type rapid-shooting and cassette-type rapid-shooting, and a cassette-type rapid-shooting on a carrier that moves between a shooting standby position and a shooting position. In addition to mounting a film holder for the cassette, it has a structure to attach a cassette holder for cassette type rapid shooting at the shooting standby position above the film holder so that it can be freely attached and detached only during cassette type rapid shooting. An X-ray fluoroscopic imaging stand quick-shooting device comprising a mechanism for switching and setting the distance between the film holder at the time of shooting and the cassette holder at the time of radiography of the cassette method and the upper surface of the quick-shooting device to the required minimum value.