JPH0427934A - X-ray radiographic device - Google Patents

Abstract

PURPOSE:To use sheet films having many sizes for photographing without increasing the width of a main body frame in the lengthwise direction of a bed by incorporating plural contact holders. CONSTITUTION:A contact holder 21 is moved between a holding position 6 and a photographing position 7 with a guide rail 23, which is attached to the main body frame, as the guide. The contact holder 21 has such size that sheet films up to films of 14X17'' size can be stored. A contact holder 22 is held in the suspended state by a guide means 24 and is moved between the holding position 6 and the photographing position 7 with a guide rail 24a as the guide. The contact holder 22 has such size that films up to films of 11X14'' size can be stored. Since plural contact holders are provided and the 11X14'' size and the 14X17'' size are prepared in this manner, they are properly used in accordance with purposes.

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial Application Field) The present invention relates to an X-ray imaging apparatus that performs X-ray imaging using a sheet film.

(Prior art) An X-ray imaging device using sheet film prepares a plurality of sheets of unexposed sheet film, takes out the sheet films one by one from an unexposed sheet film storage case at the time of imaging, and holds the film. It is held in a close contact holder to be moved and kept at a standby position, and when the desired state is reached while observing a fluoroscopic image of the affected area of the subject using an X-ray television fluoroscope, the close contact holder is sent to the imaging position. At the same time, a sufficient dose of X-rays is irradiated to take the image, and the close-up holder is returned to the standby position, the film that has been taken is removed, and the film that has not been taken is replaced with a film that has not been taken, and the above steps are repeated to take the image. It is a device that advances the process.

FIG. 3 shows such an X-ray imaging device. A conventional X-ray imaging device, which has multiple unexposed film storage cases and is configured to transport sheet films of various sizes, is shown on a bed (BT). It is a schematic block diagram seen from the longitudinal direction. Moreover, FIG. 4 is a diagram of FIG. 3 viewed from the direction of arrow α.

la and lb are unshot sheet films 2a of different sizes
, 2b. Sheet film of the size used for photography is placed on the top of the film storage case by a suction cup 3 that is movable in the directions of arrows U-D and L-R by operating from a separate operation console (not shown). The sheets are sucked and taken out one by one through the provided opening. Then, when the suction cup 3 is moved to the position of the pair of transport rollers 4,
The sheet film can be held by the transport rollers 4.

Thereby, the sheet film is sandwiched between the conveyance rollers 4 and the standby position 6, which is also the position where the sheet film is attached and detached.
It is conveyed between the close contact holders 5 which are placed open. When the sheet film is fed in, the close contact holder 5, for example, has its upper M5A closed in the direction of arrow B, thereby clamping the sheet film.

The camera waits at this standby position 6 until a photographing command is given from the console.

When an imaging command is given, the contact holder 5 is sent to the imaging position 7, which is the irradiation field position of the X-ray tube XT, using the guide rail lla of the guide means 11 as a guide, and imaging is performed.

In addition, when performing divided photography, as shown in FIG. Longitudinal direction (arrow S direction)
This is executed by moving to .

After the photographing is completed, the contact holder 5 is returned to the standby position 6 again. Here, the close contact holder 5 is opened, and at the same time, the conveyance roller 4 rotates in the reverse direction. Then, the photographed film in the close contact holder 5 is taken out while being pinched by the conveying roller 4 which rotates in the opposite direction. At this time, a storage plate 8 provided on the exit side of the conveyance roller 4 guides and stores the photographed sheet film sent into the photographed film storage case 10. Note that PA is the subject and 1.1 is the image intensifier.

(Problem to be solved by the invention) However, in the conventional X-ray imaging apparatus configured as described above, in order to convey sheet films of multiple sizes, the size of the close contact holder is adjusted to the maximum size of the sheet. The disadvantage is that the size must be large enough to accommodate the film, for example, large-angle film (14" x 14").
In an X-ray imaging apparatus that is capable of performing segmented imaging in the longitudinal direction of the bed, it has not been possible to use half-cut film (14" x 17") for imaging (even if it is not segmented imaging).

In order to use a half-cut film for imaging, an X-ray imaging device that can hold a sheet film of at least the size of the half-cut film and has a close-contact holder that can perform divisional imaging in the longitudinal direction of the bed is required. is necessary. However, in order to do so, it is necessary to
If the width of the body frame is increased in the longitudinal direction of the bed, the amount that the body frame moves in that direction will be reduced. There is a problem in that the diagnostic area of the subject becomes narrower and the diagnostic performance deteriorates.

In addition, when changing the intensifying screens attached to the upper and lower lids of the contact holder depending on the diagnosis purpose of the subject, conventional X-ray imaging equipment requires only one contact holder. Therefore, the contact holder must be removed from the device and replaced with another contact holder, which is a burden on the operator.

The present invention has been made in view of the above problems, and it is possible to use sheet films of various sizes without increasing the width of the main body frame in the longitudinal direction of the bed. It is an object of the present invention to provide an X-ray imaging apparatus that allows paper to be easily selected.

[Structure of the Invention] (Means for Solving the Problems) In order to achieve the above object, the X-ray imaging apparatus of the present invention includes at least one unexposed sheet film storage capable of storing a plurality of unexposed sheet films. The case and the position where the sheet film is attached and removed by sandwiching the sheet film and the X
A plurality of close-contact holders move back and forth between a position where line photography is performed, and a sheet film is taken out one by one from the unphotographed sheet film storage case and the sheet is placed in one of the plurality of close-contact holders. a sheet film conveying means for conveying the leaf film; and at least one for storing the photographed sheet film taken out from the close contact holder.
The camera is characterized by comprising a storage case for photographed sheet film.

(Function) Since the X-ray imaging device configured as described above has multiple close-contact holders built-in, each close-contact holder can be used for divided imaging of sheet film up to a certain size. The width of the main body frame in the longitudinal direction of the bed is increased by using a close-contact holder that cannot be used for divided photography but can be used for photographing a sheet film larger than the above-mentioned certain size. This makes it possible to use sheet film of multiple sizes for photographing.

Also, by changing the intensifying screen of each contact holder,
It becomes possible to easily select an intensifying screen according to the purpose of diagnosis.

(Example) Examples will be described with reference to the drawings.

FIG. 1 is a schematic configuration diagram of the X-ray imaging apparatus of the present invention viewed from the longitudinal direction of the bed, and FIG. 2 is a diagram of FIG. 1 viewed from the direction of arrow α. Note that the same parts as in FIG. 2 are given the same numbers and their explanations will be omitted.

21 and 22 are close contact holders, which are arranged one above the other inside the main body frame 20. The close contact holder 21 moves between the standby position W6 and the photographing position W7 using a guide rail 23 attached to the main body frame as a guide. The size of the close contact holder 21 is half-cut film (14° x 17°)
It is large enough to store sheet film up to

In addition, the longitudinal direction of the top plate of the main body frame 20 (direction of arrow S)
The width of the contact holder 21 is approximately the same as the size of the contact holder 21. Therefore, the sheet film held by this close contact holder 21 cannot be used for divided photography.

The close contact holder 22 is held in a suspended state by the guide means 24 and moves between the standby position 6 and the photographing position W17 using the guide rail 24a as a guide. The size of the close contact holder 22 is such that it can accommodate up to a large-angle film (14" x 14'). Therefore, the guide means 24 uses a guide shaft 25 and a guide rail 26 fixed to the main body frame 20 as guides. It is movable in the direction of arrow S, and the sheet film accommodated in the close contact holder 22 can be used for divided photography in the longitudinal direction of the bed. is provided with a step, so that when the close contact holder 21 and the close contact holder 22 suspended from the guide means 24 are placed at the imaging position 7, the distances from the subject PA are equal. With this configuration, it is possible to obtain an X-ray photograph with no change in magnification between the sheet film held between the close contact holder 21 and the sheet film held between the close contact holder 22 during imaging.

By having a plurality of close-contact holders in this way, and making them available in large size and half-cut size, the width of the main body frame in the longitudinal direction of the bed can be reduced from that of a conventional large-sized sheet. It becomes possible to use half-cut sheet film for photography while keeping the width the same as the main body frame which can divide the film in the longitudinal direction of the bed.

Furthermore, since it has multiple close-contact holders, by changing the intensifying screen of each close-contact holder, you can change the type of intensifying screen by operating from an operation console (not shown) without having to take out the close-contact holder from the device and replace it. It becomes possible to change.

Reference numeral 33 denotes a guide that allows a pair of transport rollers 32 and 34 (described later) or 32 and 35 to function as a sheet film transport path. A pair of conveyance rollers 34, 35 are rollers for storing and taking out sheet films into and from the contact holders, and are provided in front of the standby position of each contact holder 21, 22. The pair of transport rollers 32 are rollers that sandwich the sheet film 2a (or 2b) taken out one by one by the suction cup 3 from the film storage case la (or lb) and transport it by the guide of the guide 33. This roller transports the sheet film conveyed by the guide 33 to the photographed film storage case 10 via the storage plate 8.

In the X-ray imaging apparatus having such a configuration, the operation will be described when, for example, a half-cut film is stored in the film storage case 1a and a large-angle film is stored in the film storage case 1b.

(1) When half-cut film is used for photographing Half-cut film is taken out one by one by the suction cup 3 from the film storage case 1a by operation from an operation console (not shown), and is transferred to the transport roller 32, the guide 33, and the transport roller 34. is conveyed between the close contact holders 21. At this time, guide 3
3 is arranged at a position where rollers 32 and 34 are connected. When the sheet film is fed in, the close contact holder 21, for example, closes its top lid, clamps the sheet film, and waits at this standby position 6 until a photographing command is given. In addition, in the case of half-cut film, due to the size of the contact holder, use the contact holder 2.
It cannot be stored in 2.

When an imaging command is given, the contact holder 21 is sent to the imaging position 7, which is the irradiation field position of the X-ray tube XT, using the guide rail 23 as a guide, and after the imaging is completed, it is returned to the standby position 6 again. Here, the contact holder 21 is opened, and the sheet film is stored in the photographed film storage case by the transport roller 34, the guide 33, the transport roller 32, and the storage plate 8.

(2) When using a large-angle film for photography In the case of a large-angle film, it is possible to store it in either the close-contact holder 22 or the close-contact holder 21 due to the size of the close-contact holder. However, the operation when stored in the close-contact holder 21 is the same as the operation shown in (■), and cannot be used for divisional imaging in the longitudinal direction of the bed. When used for divided photography, it is necessary to store it in the close contact holder 22. Here, a case where the close contact holder 22 is used will be explained.

Large-sized films are taken out one by one by the suction cup 3 from the film storage case lb by operation from an operation console (not shown) and are transported between the contact holders 22 by the transport rollers 32, guides 33, and transport rollers 35. At this time, the guide 33 is placed at a position where the rollers 32 and 35 are connected.

When the sheet film is fed in, the close contact holder 22 clamps the sheet film, for example by closing the top cover, and waits at this standby position 6 until a photographing command is given.

When a photographing command is given, the contact holder 22 is sent to the photographing position 5T7, which is the irradiation field position of the xH tube XT, using the guide rail 24g of the guide means 24 as a guide, and photographing is performed.

In addition, when performing divided photography, as shown in FIG. This is executed by moving in the direction (direction of arrow S).

After the photographing is completed, the contact holder 22 is returned to the standby position W6, where the holder is opened, and the sheet film is stored in the photographed film storage case by the transport roller 34, guide 33, transport roller 32, and storage plate 8. .

As described above, the sheet film X-ray apparatus of the present invention has a plurality of close-contact holders, and each of the close-contact holders can be used to image sheet films of sizes up to large-angle films divided in the longitudinal direction of the bed. and those that cannot be used for split shooting but can use sheet film up to the size of half-cut film, so the width of the main body frame in the longitudinal direction of the bed (in the direction of arrow S) is the same as the conventional large-angle size. It is now possible to take half-sized sheet films for shooting while keeping the same width as the main body frame, making it possible to use sheet films of multiple sizes for shooting. Become.

In addition, since it has multiple contact holders, it is possible to change the intensifying screen of each contact holder, and depending on the diagnostic purpose, for example, if higher resolution is required, one of the contact holders can be used for imaging. When sensitivity is required, the type of intensifying screen can be changed by using the operation console (not shown) without having to take out the contact holder from the device and replace it, such as by using the other contact holder. This improves diagnostic efficiency and improves diagnostic efficiency. It is possible to measure the improvement of diagnostic accuracy.

Further, it is also possible to have a sheet film sandwiched between a plurality of close-contact holders, respectively, and wait at the same time at the standby position 6 until a photographing command is given. For example, it is possible to use one close-contact holder to take an image in between, while the other close-contact holder is used to take an image.

Although one embodiment of the present invention has been described above, it goes without saying that the present invention is not limited to the above-mentioned embodiment, and that various modifications can be made. For example, if you want to obtain the effect of changing the type of intensifying screen only by operating from an operation console (not shown) without taking out the contact holder from the device and replacing it, the contact holder can be used regardless of the size and type of the contact holder. It is only necessary to have multiple units built-in. Further, in this embodiment, the case where there are two close-contact holders has been described, but there are two or more close-contact holders, and there are a plurality of close-contact holders that can be divided into sections in the longitudinal direction of the bed and a plurality of close-contact holders that cannot be divided into sections. Alternatively, a device in which a plurality of either one exists is also conceivable.

[Effects of the Invention] As detailed above, according to the sheet film X-ray apparatus according to the present invention, sheet films of various sizes can be used for imaging without increasing the width of the main body frame in the longitudinal direction of the bed. . Furthermore, it becomes possible to easily select an intensifying screen depending on the purpose of diagnosis.

[Brief explanation of the drawing]

FIG. 1 is a schematic configuration diagram of an embodiment of the X-ray imaging apparatus of the present invention viewed from the longitudinal direction of the bed, FIG. 2 is a diagram of FIG. 1 viewed from the direction of arrow α, and FIG. 3 is a diagram of the conventional X-ray FIG. 4 is a schematic configuration diagram of the imaging device viewed from the longitudinal direction of the bed, and FIG. 4 is a diagram of FIG. 3 viewed from the direction of arrow α. la, lb...Film storage cases 2a, 2b...Sheet film 3...Two suction cups 6...Standby position 7...Photographing position 20...Body frame 21.22...Tight holder 23 ... Guide rail 24 ... Guide means 24a, 26 ... Guide rail 25 ... Guide shaft 32.34.35 ... Conveyance roller 33 ... Guide

Claims (4)

[Claims] (1) At least one unexposed sheet film storage case capable of storing a plurality of unexposed sheet films, and a device that holds the sheet film and moves back and forth between a position where the sheet film is attached/detached and a position where X-ray photography is performed. a plurality of close-contact holders, a sheet film take-out means for taking out sheet films one by one from the unphotographed sheet film storage case, and a sheet film taken out by the sheet film take-out means from among the plurality of close-contact holders. A sheet film transport means for loading and unloading one of the sheets, and at least one photographed sheet film storage case for storing the photographed sheet film taken out from the close contact holder by the sheet film transport means. Characteristic X-ray imaging equipment. (2) The X-ray imaging apparatus according to claim 1, wherein at least one of the plurality of close contact holders is different in size from the others. (3) At least one close-contact holder other than the close-contact holder having the largest size among the plurality of close-contact holders has the maximum size on a plane including the sheet film held by the close-contact holder. 3. The X-ray imaging apparatus according to claim 2, further comprising means for moving the contact holder in a direction perpendicular to a reciprocating direction between a position where the sheet film is attached/detached and a position where X-ray imaging is performed. (4) The plurality of close-contact holders have large-angle films (14
4. The X-ray imaging apparatus according to claim 3, characterized in that the close contact holder is capable of storing up to 14" x 14") and the close contact holder is capable of storing up to half-cut film (14" x 17").