JPH01198738A - Cassetteless speedy copying device - Google Patents

Abstract

PURPOSE:To block light projected from a noise erasing device by means of conveying rolls and light shielding members and to prevent a photographed accumulable phosphor sheet IP from being irradiated with light by arranging the light shielding members in two sets of conveying rolls around the noise erasing device installed in a conveying part so that said members abut on the rolls or are close to them. CONSTITUTION:The light shielding members 162, 163 and 10-173 are provided so that they can abut on at least two sets of conveying rolls 150, 151, 166 and 167 around the noise erasing device 30 or be close to the rolls. Namely, a pair of conveying rolls 150 and 151, a pair of conveying rolls 164 and 165, a pair of conveying rolls 166 and 167, and a pair of conveying rolls 168 and 169, four pairs in all, and a set of light shielding plates 162, 171 and 173 and a set of light shielding plates 163, 170 and 172 are further provided between two sets of conveying rolls 65-68. These conveying rolls abut on the light shielding plates. All of them are sandwiched by side plates on both sides orthogonal to paper surface. Thus, light from the noise erasing device 30 possessing a light source 180 does not leak from an area enclosed with the light shielding plates and the side plates even if the IP is conveyed, whereby a satisfactory image can be obtained.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to medical X-ray diagnostic equipment, and more particularly to a light shielding means for a noise canceling device of a cassette-less copying machine using a stimulable phosphor sheet.

[Conventional technology]

In medical X-ray diagnostic equipment, transmitted X-rays from a subject are processed using an image intensifier (ImageIntensi).
fier, hereinafter 1.1. A so-called fluoroscopic imaging platform is widely used, which allows images to be taken immediately using X-ray film as needed while observing the object using a fluoroscopic camera.

The snapshot device is one of the components of this fluoroscopic imaging platform.
This is a device that transports and stores the above-mentioned X-ray film. For a while after the development of quick-shot devices, so-called cassette-type quick-shot devices were mainly used, in which a cassette containing X-ray film was moved from a standby position to a shooting position, the image was taken, and then returned to the standby position. was. However, this cassette-type quick-shooting device is generally capable of taking only one image at a time, and requires replacing the cassette each time one film or one subject is photographed. For this reason, there has been a demand for a quick-shooting device that is labor-saving and that can take pictures more quickly. The solution to these problems was a quick-shooting device called a cassette-less quick-shooting device. This cassette-less copying device is a system that allows X-ray film to be captured one by one from a supply magazine that stores a large number of X-ray films. Take out the a film, sandwich it between two intensifying screens, then move to the shooting position and take a photo.
It is designed to automatically store images in a storage magazine after shooting is completed, and has become mainstream instead of a cassette-type quick-shooting device.

On the other hand, in recent years, volumetric phosphor sheets have come to be used instead of X-ray films. stimulable phosphor sheet (I
What is a imaging plate (hereinafter referred to as IP)? When radiation such as X-rays and γ-rays is irradiated, a part of the energy of the radiation is accumulated, and then when excitation light such as visible light is applied,
A flexible material plate is coated with a phosphor that causes stimulated luminescence in response to accumulated energy. This stimulated luminescence is read by a photoelectric element, etc., and the read signal is used to obtain image information.
Finally, the image is created on a CRT or hard copy and used for diagnosis. In addition to being able to be used repeatedly, this IP also has the excellent property of being able to correct the image quality through image processing, which reduces the radiation dose to the subject, and the image information is digital. Therefore, it has the advantage that it is easy to store and search images. Therefore, it has been desired to be able to use this IP in a cassette-less type snapshot device on a fluoroscopic imaging stand.

[Problem to be solved by the invention]

At present, the mainstream of snapshot devices using IP is the cassette type. For this reason, a cassette-less type IP speed copying apparatus has come to be required for the same reason as that required for X-ray film as described above.

However, when configuring a cassette-less snapshot device using IP (hereinafter referred to as a blade-setter-less IP snapshot device), as described in Japanese Patent Application Laid-Open No. 57-119340, it is necessary to eliminate noise caused by afterimages and fogging. It is necessary to incorporate a noise canceling device that irradiates the surface of the IP with light.

In order to eliminate this IP noise, it is necessary to
As described in Japanese Patent No. 119340, it is necessary to irradiate several thousand lux/seconds of light (e.g., the light equivalent to several lights if a fluorescent lamp is used as the light source). Meanwhile, after shooting,
Reading device (The cassette-less IP snapshot device does not have a built-in function to read the above-mentioned stimulated luminescence using a photoelectric element and process the process until it is converted into an image on a VRT or hard copy.Hereinafter, a device with this function will be described. When the IP is irradiated with light, the accumulated energy is erased, making accurate diagnosis impossible. For this reason, it is necessary to shield the IP already photographed in the cassette-less IP snapshot device from the light of the noise canceling device, but as mentioned above, the amount of light from the noise canceling device is extremely large, and it is necessary to It was very difficult to accommodate it in the device.

[Means to solve the problem]

In order to solve the above-mentioned problems, at least two sets of conveyance rollers are installed before and after a noise canceling device that eliminates noise remaining in the stimulable phosphor sheet provided on the conveyance path for conveying the unphotographed IPJ to the photographing standby position. This is achieved by providing a light shielding member that is placed in contact with or in close proximity to each of the elements.

[Effect]

When the unphotographed IP enters the transport section to be noise removed,
Since the light shielding member is placed in contact with or close to the two sets of conveyance rollers before and after the noise canceling device provided in the conveying section, even if the IP is irradiated with light by the noise canceling device, this light will not be transmitted to these conveying rollers. The light is blocked by the light blocking member, and the IP that has already been photographed is no longer irradiated with light, making it possible to obtain a good image.

[Embodiment] An embodiment of the present invention will be described below with reference to FIGS. 1, 2, 3, 4, 5 and 6. Note that this example uses X-ray film and IP
Since this study was carried out on a cassette-less fluoroscopic imaging table that can use both of the above, we will begin by explaining this cassette-less fluoroscopic imaging stand.

FIG. 4 is a front view showing the general structure of the cassette-less fluoroscopic photographing table. The X-ray tube device 1 irradiates the subject 2 lying on the top plate 6 with an X-ray flux 5, and the X-rays that have passed through the subject 2 are incident on 1.1.4.

The object transmission X4s information from 1.1.4 is displayed on the monitor (path shown) by a video system (not shown). This image is then inspected by the doctor or operator, and as needed, it is transferred to an X-ray film or an I.
Photographed by P. The transmitted X-ray information of the subject 2 photographed on X-ray film or IP is developed in the case of X-ray film, and is applied to the above-mentioned reading device in the case of IP,
It is imaged and used for diagnosis of the subject 2. FIG. 5 is a perspective view showing the general configuration of a cassette telephoto copying device;
This shows the case where an X-ray film is used. The snapshot device 3 includes an X-ray film supply magazine 10 that removably stores unexposed X-ray films, and an X-ray film storage magazine 1 that stores X-ray films that have already been photographed.
1 is installed. Furthermore, this speed copying apparatus 3 is provided with a portion of an X-ray film holder 100 that holds X-ray films fed one by one from the X-ray film supply magazine 10. This holder part 100 is moved to the photographing position 111 (
After moving to this imaging position 111, the subject 2 (FIG. 4) is photographed.

When the imaging is completed, the holder portion 100 returns to the position shown by the solid line (standby position), and the X-ray film is stored in the storage magazine 11.

FIG. 6 is an explanatory diagram for explaining the general structure inside the snapshot apparatus, and shows the case where an X-ray film is used. The X-ray film supply magazine 1o is attached to the supply magazine attachment/detachment section 14 of the quick-shooting device 3, and the X-ray film supply magazine 10 contains the X-ray film 2 that has not yet been photographed.
00 are stacked. When an operator wants to take an image, the X-ray film is taken out one by one by the supply section 19 consisting of the suction pad 22 and its driving device (not shown), and the leading end is inserted between the conveying rollers 65 and 66. It has become so. The conveyor rollers 65, 66 are conveyor rollers 67, 68, 71, 72, a guide plate 63, a large roller 64, and a conveyor roller 50, 51, 52, 53, 54, 55 that forms part of a storage means to be described later. ,5B
, and a part of the belt 301 form the conveying section 20, and these rollers and the belt are driven by a drive device (not shown). Note that, in the middle of the transport path of the transport unit 2o, there is provided a noise canceling device 30 for erasing the noise of the IP when an IP (to be described later) is used, and its control device (not shown), but they are not operated here. With these,
The X-ray film 200 taken out from the X-ray film supply magazine 10 is conveyed toward conveyance rollers 71 and 72. The holder part 100 has transport rollers 73 and 74 driven by a drive device different from the roller and belt drive device used in the transport section 20 described above and the storage means described later, and one of which has a container-like shape. a container member 36, a plate member 33, a hinge 37 for movably supporting the plate member 33 within the container member 36, and an intensifying screen 31 attached to the plate member 33 and the container member 36.
．． 32, and a contact mechanism 39A consisting of a spring for bringing the X-ray film 200A inserted between the two intensifying screens 31, 32 into close contact with these intensifying screens 31, 32.

39B, and the air between the plate member 33 and the vessel member 36 is sucked through the holes made in the plate member 33 and the vessel member 36, and the intensifying screen 31, 32 and the X-ray film 200A are completely brought into close contact. an air suction device (not shown), such as a vacuum pump, attached to one end of the hose 70, and an intensifying screen 31 to prevent air from leaking between the plate member 33 and the device member 36. .32, the rod members 110, 120 for moving the holder part 100 to the photographing position 111 (FIG. 5), and a drive device (not shown). bearings 45 and 46 that connect the holder part 100 to the guide means 150, and a support member 40.4 that supports the bearings 45 and 46 fixed to the container member 36.
1, and an L-shaped member 80 for opening and closing the plate member 33.
A roller 48 that comes into contact with this L-shaped member 80, and a support that rotatably supports this roller 48 and moves as shown by arrow B to pull down the L-shaped member 8o and plate member 33 together with this roller 48. A holder having such a structure is composed of a member 47 and a drive device (not shown) that performs this operation (however, the roller 48. The support member 47 and this drive device are supported from outside the holder part 100). In the part 100, when the X-ray film is sent from the transport section 20, the plate member 33 is pulled down by the L-shaped member 80, the roller 48, the support member 47, and a drive device (not shown). The X-ray film 200A is inserted between the plate member 33 and the intensifying screens 31 and 32 attached to the device member 36 by the transport rollers 73 and 74. The X-ray film 20OA is brought into complete contact with the intensifying screen 31, 32 by the contact mechanisms 39A, 39B, a hose 70, and an air suction device (not shown) attached to one end of the hose 70. After that, the holder part 100 is attached to the rod member 110.
, 120 and a guide means 150 consisting of a drive device (not shown), it is moved to the imaging position 111 and used for imaging the subject 2.

After photographing, the holder portion 100 is returned to its original standby position by the guiding means 150 again. The plate member 33 is L
It is pulled down by the shaped member 80, the roller 48, the support member 47, and a drive device (not shown). Then, the X-ray film 200A is taken out from the holder part 100 by the transport rollers 73, 74. The X-ray film 20OA that has been photographed in the holder part 100 is
Conveyance rollers 71, 72 and 50.51, 52, 53°54
．． 55, 56. Large roller 64, belt 301 connecting these, guide plate 63, guide plate 69, conveyance roller 60
, 61, a belt 300 connecting these, and a guide plate 62
, and an X-ray film storage magazine 1 mounted on the storage magazine attachment/detachment section 15 by a storage means 21 comprising a drive device (not shown) that drives these rollers and belts.
It is stored in 1. A barcode reader 500 is provided at the top of the X-ray film storage magazine 11 to be used when IP is used, which will be described later.

Next, the case of using IP will be explained using FIG. FIG. 3 is a diagram for explaining the general configuration inside the snapshot device when IP is used.

The difference from the configuration shown in FIG. 6 is that the supply magazine 10 and the storage magazine 11 are replaced by the IP supply magazine 12 and the storage magazine 1.
3, the noise canceling device 30 is activated, and the holder part 100 is replaced with the IP holder part 101. It is the same as when used.

Therefore, these descriptions will be omitted and only the holder portion 101 will be described. The IP holder part 101 has the function of bringing the intensifying screen and the film into close contact with each other, whereas the IP holder part 101 does not require this function. , are almost the same, so their configuration will be explained and the operation will be omitted. This holder part 101 has transport rollers 75 and 76 driven by a drive device different from the roller and belt drive device used in the transport section 20 and storage means 21, and a container shaped container with one side open. A member 85, a plate member 87, a hinge 86 for movably supporting the plate member 87 in the instrument member 85, and a radiation absorption coefficient member attached to the instrument member 85 on the X-ray source side. It consists of a low plate member 27, a plate member 28 attached to the plate member 87, and a spring for holding the IP400A inserted between the two plate members 27 and 28 in close contact with these plate members 27 and 28. A holding means 180 consisting of close contact mechanisms 91A and 92B, a guiding means 150 consisting of the rod members 110 and 120 for moving the holder part 101 to the photographing position 111 (FIG. 5) and a drive device (not shown); Bearings 83, 84 (same as 45° 46 explained in FIG. 6) and the device member 8
a support member 121 fixed to 5 and supporting bearings 83°84;
, 122, an L-shaped member 88 for opening and closing the plate member 87, and a roller 48 that comes into contact with this L-shaped member 88,
A support member 47 that moves in the direction shown by arrow B together with this roller 48 to pull down the L-shaped member 88 and the plate member 87, and a support member 47 that rotatably supports this roller 48, and a drive (not shown) that performs this operation. equipment (however, roller 48
．． The support member 47 and this drive device are supported from outside of the holder part 101). In addition, the barcode reader 500 provided at the top of the IP storage magazine 13 allows
The barcode affixed to the back of IP400 is IP40
0 is stored in the IP storage magazine 13 and then read.

Next, the light shielding means of the noise canceling device to which the present invention is directed will be explained with reference to FIGS. 1 and 2. FIG. 1 is a side view showing a light shielding means of an erasing device according to a first embodiment of the present invention. In this FIG. 1, the conveyance roller 6
5, 66, 67° 68 are the same as those explained in FIG. 3 and FIG.
4 pairs of conveyance rollers 66, 167, 168 and 169,
Light shielding plates 162, 171, 173 and 163°170.1
There are two sets of 72. These conveyance rollers and light shielding plates are 150, 170, 151, 171, 166, 172,
167 and 173 are in contact with each other. These conveyance rollers and light shielding plates are sandwiched by side plates (not shown) on both sides in a direction perpendicular to the plane of the paper. As a result, the light from the noise canceling device 130 having the light source 180 will not leak from the area surrounded by the light shielding plate and the side plate even if the IP is transported in the directions shown by the arrows C and D.

Next, a second embodiment of the present invention will be described.

FIG. 2 is a schematic diagram showing a light shielding means of an erasing device according to a second embodiment of the present invention. In the first embodiment described above, each conveyance roller rotates in pairs, so the conveyance rollers rarely wear out together, but the conveyance roller 150°151.166.167 in contact with the light shielding plate does not wear out. Conceivable. The second embodiment solves this problem. That is, the conveyance roller and the noise erasing bag 5!30 are the same as those described in the first embodiment, but the light shielding plates 154, 158, 155, 159, 156°1
60, 157, and 161 are not in contact with the conveyance roller, and the key light plates are close to each other like a slit to block light from the noise canceling device. As a result, although the light-shielding performance is slightly inferior to that of the first embodiment, there is no wear on the conveyance roller and the light-shielding plate.

In addition, in this second embodiment, the distance between the pair of conveyance rollers is IP
It is necessary to take into account the elasticity of the light shielding plates and determine the slit-like gap between the light shielding plates and the interval between the pair of conveyance rollers so as not to cause an obstacle when transferring the IP between the pair of conveyance rollers. It is desirable to perform surface treatment such as black painting or plating to prevent light reflection as much as possible.

In addition, in this second embodiment, the light shielding plates 154°155.
156 and 157 are formed with a C-shaped cross section, but are not limited to this, and the light shielding plates 163 and 1
From 62, for example, light shielding plates 158 and 159 may be provided perpendicularly to the IP transport direction.

In addition, in the above two embodiments, the conveyance roller pair 164
, 165, 168, and 169 are conveyor roller pairs 150, 15
The distance between 1 and 166 and 167 is short, allowing the X-ray film or IP to be conveyed smoothly by the pair of rollers 150, 151 and 16.
6.167 does not need to be provided as long as it can be transferred.

〔Effect of the invention〕

According to the present invention, the light from the noise canceling device is blocked and the IP that has already been photographed is not irradiated with light, making it possible to obtain a good image. This allows accurate diagnosis.

[Brief explanation of the drawing]

FIG. 1 is a schematic diagram showing a light shielding means of a noise canceling device according to a first embodiment of the present invention, and FIG. 2 is a schematic diagram showing a light shielding means of a noise canceling device according to a second embodiment of the present invention.
FIG. 3 is an explanatory diagram for explaining the internal configuration of a snapshot device when using an IP according to an embodiment of the present invention, FIG. Figure 5 is a perspective view showing the general configuration of the snapshot device;
The figure is an explanatory diagram for explaining the internal configuration of a snapshot device when an X-ray film is used. 12... IP supply magazine, 13... IP storage magazine, 30... noise canceling device, 101... I
P holder, 150, 151... Conveyance roller pair, 1
66°167...Conveyance roller pair, 154,155,1
56°157.158,159,160,162.16
'3゜170.171,172,173... Light shielding member, 166.167... Conveyance roller pair, 180... Light source, $ 1/'7/ J! 72nd/13σ #3rd 5th 6th Figure

Claims (1)

[Claims] 1. In a cassetteless snapshot device using a stimulable phosphor sheet, the storage device is provided in a conveyance path for conveying an unphotographed stimulable phosphor sheet taken out from a supply magazine to a photographing standby position. What is claimed is: 1. A cassetteless snapshot device, characterized in that a light shielding member is provided in contact with or in close proximity to each of at least two sets of conveyance rollers before and after a noise erasing device for erasing noise remaining on a fluorescent phosphor sheet. 2. The cassette telephoto copying device according to item 1, wherein the light shielding member disposed close to the conveyance roller forms a plurality of slit-like gaps in the conveyance path of the stimulable phosphor sheet.