JPH01298340A - Cassetteless quick shot radiographing device - Google Patents

Abstract

PURPOSE:To improve diagnostic efficiency and to prevent a burden to a person to be examined by incorporating a light detector detecting light emitted by a noise removing device removing residual noise on an unphotographed accumulative phospher sheet taken out from a supply magazine in a quick shot radiographing device, and detecting the malfunction of the noise removing device by means of a film when the film is used. CONSTITUTION:The quick shot device incorporates the light detector 500 detecting light emitted by the noise removing device 30 removing the residual noise on the unexposed accumulative phospher sheet taken out from the supply magazine 12 and detects that the noise removing device 30 malfunctions to light up when a X-ray film is used. That is, when an unexposed film passes near the noise removing device and when the film is irradiated with light due to the failure of the noise removing device 30, the light detector 500 provided near the noise removing device 30 detects the malfunction and transmits the information to an operator. Therefore, using the X-ray film irradiated with light for radiographing can be prevented. Thus, diagnostic efficiency can be improved and the burden to the person to be examined can be prevented.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to medical X-ray diagnostic equipment, and particularly to noise reduction in cassette-less copying equipment that uses an X-ray film and a storable phosphor sheet alternatively. Relating to an erasing device.

[Conventional technology]

In medical X-ray diagnostic equipment, transmitted X-rays from a subject are
, I, (Image Intensifier+
Below 1.1. A so-called fluoroscopic imaging platform is widely used, which allows images to be taken immediately with X-ray film as needed while observing the image (wA). The speed-shooting device is one of the components of this fluoroscopic photographing table, and the speed of the above-mentioned X-ray film.

This is a storage device. 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 can generally only take one image at a time, and it is necessary to replace the cassette every time one film or 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 telephoto shooting device takes X-ray films one by one from a supply magazine that stores a large number of X-ray films, places them between two intensifying screens, moves to the imaging position, takes pictures, and After completion, the devices are automatically stored one after another in the storage manganese, and have become mainstream, replacing the cassette-type quick-shooting device.

On the other hand, in recent years, stimulable 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 one image information.
Ultimately, the image is created on a CRT or hard copy and used for diagnosis. This IP has the advantage of being able to be used repeatedly, as well as being able to correct the image quality through image processing.
It has the advantage that the radiation dose to the subject can be reduced, and since the image information is digital, 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 that the invention is trying to solve]

At present, the mainstream of snapshot devices using IP is the cassette type. Therefore, for the same reason as when X-ray film was required as described above, a cassette-less type speed copying apparatus was required. However, a cassette-less snapshot device that uses IP (hereinafter referred to as a blade-set IP snapshot device) uses a reader (the cassette-less IP snapshot device reads the above-mentioned stimulated luminescence using a photoelectric element, etc., and converts it into an image on a CRT or hard copy. It does not have a built-in function to process the steps up to the point where it is read.A device with this function (hereinafter referred to as a reading device) is required. For this reason, Kasetsuteres I
If the P snapshot device cannot use IPL, it will be difficult to diagnose if the reading device should break down. In order to solve this problem, there has come into existence a snapshot device that can use both X-ray film and IP (hereinafter referred to as a blade setterless F/IP snapshot device).

By the way, the above-mentioned cassette-less IP snapshot device is
As described in Japanese Patent No. 7-119340, it is necessary to incorporate a noise canceling device that irradiates light onto the surface of the IP in order to eliminate noise due to afterimages and fog.

On the other hand, in the cassetteless F/IP snapshot device, when the noise canceling device malfunctions and the X-ray film is irradiated with light, it is necessary to take the image again. For this reason, it is desirable to be able to determine the failure before photographing.

However, to visually check whether light is being irradiated from the outside, the interior of the snapshot device must be completely shielded from outside light, and the noise canceling device must also be This is impossible because it requires complete light shielding. This confirmation must be made based on the image obtained after photography and development.

This not only adversely affects diagnostic efficiency but also places a burden on the examinee.

[Means to solve the problem]

The above-mentioned problem can be solved by incorporating a photodetector in the snapshot device to detect the light emitted by the noise canceling device that erases the noise remaining in the unphotographed IP taken out from the supply magazine, and when using X-ray film, the noise canceling device This is achieved by detecting when the light turns on due to malfunction.

[Effect]

When an unshot film passes or enters the vicinity of the noise canceling device, if light is emitted due to a failure of the noise canceling device, a photodetector installed near the noise canceling device detects this. The information is transmitted to the operator. As a result, it is possible to prevent the X-ray film irradiated with light from being used for imaging, thereby improving diagnostic efficiency and eliminating the burden on the subject.

〔Example〕

Hereinafter, embodiments of the present invention will be explained with reference to FIGS. 1, 2, 3, 4, and 5.

FIG. 3 is a front view showing a schematic configuration of a cassette-less fluoroscopic photographing stand in an embodiment. 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. 1.1.
The object-transmitted X-ray information from 4 is displayed on a monitor (path shown) by a video system (not shown). This image is then photographed on X-ray film or IP using the quick-shooting device 3 as necessary while being scanned by the doctor or operator. The transmitted X-ray information of the subject 2 photographed on an X-ray film or IP is developed in the case of an X-ray film, and in the case of IP, it is applied to the above-mentioned reading device, converted into an image, and used for diagnosis of the subject 2. . Figure 4 shows Kasetsuteres F/
FIG. 1 is a perspective view showing a schematic configuration of IP snapshot*[, and is shown in the case where X-ray film is used. The snapshot device 3 is removably attached with an X-ray film supply magazine 10 that stores unexposed X-ray films and an X-ray film storage magazine 11 that stores X-ray films that have been photographed. Furthermore, this speed copying device 3 is supplied with X-ray film fed one by one from the X-ray film supply magazine 10.
Part 100 of an X-ray film holder that holds a radiographic film
is provided. This holder part 10o is a support frame 10
The object 2 is moved along rod members 110 and 120 attached to the object 1 to an imaging position 111 by a drive mechanism (not shown). will be photographed. When the shooting is finished, this holder part 1, OO returns to the position shown by the solid line (standby position).

The X-ray film is stored in a storage magazine 11.

FIG. 5 is an explanatory diagram for explaining the general structure inside the cassette-less F/IP speed copying apparatus, and shows the case where X-ray film is used.

The xH film supply magazine 10 is attached to the supply magazine attachment/detachment section 14 of the snapshot device 3, and unphotographed X-ray films 200 are stacked on this X-ray film supply magazine 10. When the operator performs imaging, the X-ray film is taken out one by one by the supply section 19, which consists of the suction pad 22 and its driving device (not shown).
Its leading end is inserted between conveyance rollers 65 and 66. The conveyance rollers 65 and 66 are conveyance rollers 67
．． 68, 71, a guide plate 63, a large roller 64, and a conveying roller 50 forming a part of a storage means to be described later.
51, 52, 53, 54, 55°, 56.72, and 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 conveyance path of the conveyance unit 20, when an IP (to be described later) is used, a noise canceling device 30 for eliminating noise of this IP and its control device (not shown) are provided, but they are not operated here. Due to these, the X-ray film 2 taken out from the X-ray film supply magazine 10
00 is conveyed toward conveyance rollers 71 and 72. The holder part 100 has transport rollers 73 and 74, which are driven by a drive device different from the roller and belt drive device used in the transport section 20 and the storage means described later, and a container-like shape with one side open. a container member 36,
A plate member 33, a hinge 37 for movably supporting the plate member 33 within the vessel member 36, and a plate member 3.
3 and an intensifying screen 31 and 32 attached to the device member 36,
Close contact mechanisms 39A and 39B consisting of springs for bringing the X-ray film 200A inserted between the two intensifying screens 31 and 32 into close contact with these intensifying screens 31 and 32, and the plate member 33 and the instrument member. A hose 70 for sucking the air between the plate member 33 and the instrument member 36 through a hole opened in the hole 36 to completely bring the intensifying screen 31, 32 and the X-ray film 20OA into close contact; An air suction device (not shown), such as a vacuum pump, is attached to one end of the plate member 33 and the intensifying screen 31. ．． 32, the rod members 110, 120 for moving the holder part 100 to the photographing position 111 (FIG. 4), and a drive device (not shown). Bearings 45, 46 connecting the guide means 150 and the holder part 100 to the guide means 150, support members 40, 41 supporting the bearings 45, 46 fixed to the vessel member 36, and the plate member 3.
3, an L-shaped member 80 for opening and closing the plate member 33, a roller 48 that contacts this L-shaped member 80, an arrow B for pulling down the L-shaped member 80 together with this roller 48, and the plate member 33.
The support member 47 rotatably supports the roller 48 and the drive device (not shown) that performs this operation (however, the roller 48, the support member 47, and the drive device are connected to the holder part 100). (supported from outside).

The holder part 100 having such a configuration is configured such that when an 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), and the X-ray film 200A is moved to the plate member 33 by the transport rollers 73 and 74.
and an intensifying screen 31, 32 attached to the device member 36.

The X-ray film 200A has a close contact mechanism 39A.

39B, a hose 70, and an air suction device (not shown) attached to one end of the hose 70, the intensifying screens 31 and 32 are completely brought into close contact.

After that, the holder part 100 is attached to the rod members 110 and 120,
It is moved to the imaging position 111 by a guide means 150 consisting of a drive device (not shown), and is 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 connected to the L-shaped member 80, the roller 48, and the support member 4.
7 and a drive device (not shown).

Then, the X-ray film 200A is transferred to the transport roller 73°74.
It is taken out from the holder part 100 by.

X that was photographed and photographed in the holder part 100
The line film 200A is transported by conveying rollers 71, 72 and 50.
51, 52, 53, 54, 55, 56, large roller 64
, and a belt 301 and a guide plate 63 that connect these. Information board 69. The X is attached to the storage magazine attachment/detachment section 15 by a storage means 21 consisting of conveyance rollers 60, 61, a belt 300° guide plate 62 that connects these rollers, and a drive device (not shown) that drives these rollers and the belt.
It is stored in a line film storage magazine 11.

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 where IP is used will be explained using FIG. 2. Figure 2 shows the cassetteless F/ when using IP.
FIG. 2 is an explanatory diagram for explaining the general configuration inside the IP snapshot device. The difference from the configuration shown in FIG. 5 is the supply magazine 10. The storage magazine 11 is connected to the IP supply magazine 12. The storage magazine 3 was replaced with the noise canceling device 30, the holder part 100 was replaced with the IP holder part 101, and the supply part 19. Transport section 20. Storage section 21
is the same as when using the aforementioned X-ray film. Therefore, these descriptions are omitted, and the holder part 101
I will only explain. Note that the IP holder part 101 has the function of bringing the intensifying screen and the film into close contact with the X-ray film holder part 100.
Apart from the fact that this is not necessary, they are essentially the same, so we will only explain the configuration and omit the operation. 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 2o and the 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 within the instrument member 85, and a radiation absorption coefficient The low plate member 27, the plate member 28 attached to the plate member 87, and a spring for bringing the IP400A inserted between the two plate members 27.28 into close contact with these plate members 27.28. Holding means 180 consisting of mechanisms 91A and 91B. The rod members 110 and 120 for moving the holder part 101 to the photographing position 111 (FIG. 4), the guide means 150 consisting of a drive device (not shown), and the bearings 83 and 84 (fifth
(same as 45 and 46 explained in the figure) and the vessel member 85
Supporting members 121 and 122 are fixed to support the bearings 83 and 84, an L-shaped member 88 for opening and closing the plate member 87, a roller 48 that comes into contact with this L-shaped member 88, and an L-shaped member together with this roller 48. The roller 4 moves as shown by arrow B to pull down the member 88 and the plate member 87.
It consists of a support member 47 that rotatably supports the roller 48, and a drive device (not shown) that performs this operation (however, the roller 48, the support member 47, and this drive %B are supported from outside the holder part 101). . In addition, the barcode reader 500 provided at the top of the IP storage magazine 13 allows the IP40
The barcode affixed to the back of 0 is IP400 1P.
After being stored in the storage magazine 13, it is read.

Next, the operation of the noise canceling device to which the present invention is directed and the photodetector provided within or near the noise canceling device will be explained with reference to FIG. FIG. 1 is a side view showing the general configuration of the noise canceling device, in which conveyance rollers 65, 66, 67, 6
8 is the same as that explained in FIG. 2 and FIG.
c, four sets of conveyance rollers 8 and 169, and a light shielding plate 162,
．． Two sets, 171, 173 and 163, 170, 172, are provided. These conveyance rollers and light shielding plates are 150 and 17
0,151 and 171,166 and 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 paper surface.

As a result, the light from the noise canceling device 30 having the light source 180 does not leak even when the IP is conveyed in the directions shown by arrows C and D, and the light is not irradiated onto the film or the photographed IP. ing.

The photodetector 500 includes a side plate and a light shielding plate 162, which are not shown.
163, 170, 171, 172, 173, and when the film is transported, the light source 18
This photodetector detects when 0 is activated due to a fault. This information is then notified to the operator using, for example, a lamp or a buzzer (not shown). These can prevent the film irradiated with light from being used for photographing.

In other words, the efficiency of diagnosis can be improved, and there will be no burden on the examinee.

This embodiment has been explained using a cassetteless F/IP quick copy device that can use both film and IP by replacing the supply magazine, storage magazine, and part of the holder, but it is also possible to select film and IP simultaneously. It may also be of a type that can be used by Further, the position of the photodetector 500 may be within the noise canceling device [30], or may be placed anywhere within the range where the light 19180 can reach.

〔Effect of the invention〕

According to the present invention, it is possible to know the failure of the noise canceling device before photographing, so that it is possible to prevent a film that has been irradiated with light from being used for photographing. This improves diagnostic efficiency and eliminates burden on the subject.

[Brief explanation of the drawing]

Fig. 1 is a schematic diagram showing a noise canceling device and a photodetector according to a first embodiment of the present invention, and Fig. 2 explains the internal configuration of a snapshot device when using an IP according to an embodiment of the present invention. FIG. 3 is a front view showing the general structure of the cassette-less fluoroscopic photographing table in the embodiment, FIG. 4 is a perspective view showing the general structure of the snapshot device, and FIG. FIG. 3 is an explanatory diagram for explaining the internal configuration of the snapshot device in the case of FIG. 12. IP supply magazine, 13... IP storage magazine Figure 1 Figure Z

Claims (1)

[Claims] 1. In a cassette telephotography device that uses X-ray film and a stimulable phosphor sheet alternatively, it erases the noise that remains on the unexposed stimulable phosphor sheet taken out from the supply magazine when the stimulable phosphor sheet is used. A cassette-less snapshot device, characterized in that a photodetector for detecting light emitted by a noise canceling device is built into the snapshot device, and a malfunction of the noise canceling device is detected when the film passes near the noise canceling device when the film is in use. .