JPH01298342A - Cassetteless quick shot radiographing device - Google Patents

Abstract

PURPOSE:To prevent both an X-ray film and an accumulative phospher sheet (IP) from being fed obliquely by equipping a feeding means with adjusting mechanisms capable to adjust pressure and adjusting the pressure with the adjusting mechanisms so as to be larger when feeding the IP than when feeding the X-ray film. CONSTITUTION:The adjusting mechanisms 162, 168, 169 and 170-175 capable to adjust the pressure is provided on a set of the feeding means consisting of a driving roller 66 and a driven roller 65 where to the pressure is applied by the driving roller 66. The pressure is adjusted with the adjusting mechanism 162, 168, 169 and 170-175 so as to be larger for the IP than for the X-ray film. That is, when the X-ray film is fed, the roller pressure of the driving roller 66 and the driven roller 65 is appropriately set for the X-ray film, and when the IP is fed, it is set larger so to be appropriate for the IP. Oblique feeding can be thereby prevented for both the IP and the X-ray film.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a medical xa diagnostic device, and more particularly to a conveying means for a cassette-less copying device capable of using an X-ray film and a stimulable phosphor sheet.

[Conventional technology]

In medical X-ray diagnostic equipment, transmitted X-rays from a subject are
, I, (Image Intensifier
, below 1. I.

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 photographing stand, and is a device that transports and stores the X and %I films mentioned above. For a while after rapid photography devices were developed, the cassette containing the X-ray film was moved from the standby position to the shooting position.
The so-called cassette-type quick-shooting device, which takes a picture and then returns to the standby position, was mainly used. 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. Therefore.

A quick-shooting device called a cassette-less quick-shooting device solved these problems. What is this cassette-less ear device?
The X-ray film is taken out one by one from the supply magazine that stores a large number of X-ray films, is sandwiched between two intensifying screens, then moved to the imaging position and taken, and after the imaging is completed, they are placed in the storage magazine one after another. It is designed to automatically store the camera, and has 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. What is a stimulable phosphor sheet (Imaging Plate, hereinafter referred to as IP)? When it is irradiated with radiation such as X-rays or γ-rays, part of the energy of the radiation is accumulated, and then when it is irradiated with excitation light such as visible light, 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, which is ultimately converted into an image on a CRT or hard copy and used for diagnosis. . This IP has the excellent property of being able to be used repeatedly and the image quality can be corrected through image processing, so it is possible to reduce 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 speed copying apparatus has become required for the same reason as that required for X-ray film as described above. 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, in conveyance means such as rollers and belts that are generally used when conveying X-ray film, various problems arise depending on the magnitude of the pressing force (hereinafter referred to as roller pressure) of a pair of rollers or belts. For example, if the roller pressure is too low, the X-ray film may be conveyed obliquely during transport (hereinafter referred to as skew feeding), and if it is too large, marks may be made on the film surface due to static electricity (hereinafter referred to as skew feeding).
(referred to as static marks) or impressions.

That is, in order to prevent such problems from occurring, it is necessary to set the roller pressure to an appropriate level. The appropriate value for this roller pressure depends on the material of the roller or belt, and the loading position of the pair of rollers or belt.

It varies depending on the angle, delivery angle, etc., and is currently adjusted for each roller or belt, but based on experience, it is desirable that it be approximately several kg/a# or less. Moreover, the smaller the roller pressure, the less wear and tear on the roller or belt, so it is better to make it as small as possible without causing skew. On the other hand, in order to protect the phosphor on the surface of IP, it must be less than about 200 kg/d, and the
As mentioned for the line film, if the roller pressure is low, it will cause skew, and if it is high, it will cause static marks. However, on the other hand, the mechanical properties of X-ray film and IP are quite different. For example, four-cut paper (approximately 25cm
30cm), the thickness is about 3 times and the weight is about 6 times. Therefore, in order to prevent skewing, a roller pressure greater than that for X-ray film is required, but it goes without saying that it is better to lower the roller pressure as much as possible to the extent that skewing does not occur.

For these reasons, when both the X-ray film and the IP are transported by rollers or belts and the same roller pressure is used, for example, in order to transport the X-ray film, it is necessary to transport the IP using a roller pressure suitable for the X-ray film. If the X-ray film is conveyed using a roller pressure suitable for IP, it may cause static marks, impressions, or unnecessarily wear out the rollers. was there.

[l! ! Means to solve the problem]

In order to solve the above problems, one set consists of a drive roller or drive belt, one of which is fixed to the conveyance path, and a driven roller or driven belt to which a pressing force is applied to the drive roller or drive belt. This is achieved by providing an adjustment mechanism that can adjust the pressing force in the conveying means, and using this adjustment f1 mechanism, the pressing force is made larger when conveying the stimulable phosphor sheet than when conveying the X-ray film. be done.

[Effect]

When transporting an X-ray film, the roller pressure of the drive roller or drive bell 1- and the driven roller or driven belt is set to a roller pressure suitable for the X-ray film by an adjustment mechanism, and when transporting an IP, the roller pressure of the drive roller or drive bell 1- and the driven roller or driven belt is set to a roller pressure suitable for the X-ray film. Make the roller pressure larger than that. This makes it possible to reduce skew and static marks for both IP and X-ray films.

〔Example〕

Embodiments of the present invention will be described below with reference to FIGS. 1.2, 3, and 4.5.

FIG. 3 is a front view showing the general configuration of the cassette-less fluoroscopic photographing stand in the embodiment. The X-ray tube bag opening 1 irradiates the subject 2 lying on the top plate 6 with an X-ray beam 5, and the X-rays that have passed through the subject 2 are emitted.

1.4. The object-transmitted X-ray information from 1.1.4 is displayed on a monitor (Q in the figure) by a video system (not shown). This image is then FA'lA'd by the doctor or operator and, if necessary, is
Shoot on line film or IP. 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. . FIG. 4 is a perspective view showing the general structure of the cassette-less F/IP speed copying apparatus, and shows the case where X-ray film is used. An X-ray film supply magazine 1o that stores unexposed X-ray films and an X-ray film storage magazine 11 that stores X-ray films that have already been photographed are detachably attached to the snapshot device 3. Further, the speed copying apparatus 3 is provided with a part of an X-ray film holder 100 for holding X-ray films fed one by one from the X-ray film supply magazine 1°. This holder part 100 is movable along rod members 110 and 120 attached to the support frame 101 to a photographing position 111 by a drive mechanism (not shown), and after moving to this photographing position 111, Subject 2 (third
Figure) is taken. When the photographing is finished, the holder part 100 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 X-ray film supply magazine 10 is attached to the supply magazine attachment/detachment section 14 of the snapshot apparatus 3, and unphotographed X-ray films 200 are stacked on the 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 conveyance roller 50+ forming part of a storage means to be described later.
51, 52, 53, 54.55°, 56.72, and a portion 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. As a result, the X-ray film 200 taken out from the X-ray film supply magazine 10 is transported toward the transport rollers 7L and 72. The holder part 100 is connected to the above-mentioned transport section 20.
and a conveyance roller 73 driven by a drive device different from the roller and belt drive device used in the storage means described later.
74, a container member 36 with one side open and shaped like a container, a plate member 33, a hinge 37 for supporting this plate member 33 so that it can move within the container member 36, and a plate member 33. An intensifying screen 31.33 attached to the instrument member 36 and 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. 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 a hose 70 for completely adhering the X-ray film 200A, an air suction device such as a vacuum pump (not shown) attached to one end of the hose 70, and a space between the plate member 33 and the instrument member 36. flexible backing members 35A, 35B provided around the intensifying screens 31, 32 to prevent air leakage; and the rod member 110 for moving the holder part 100 to the photographing position 111 (FIG. 4). , 120, a guide means 150 consisting of a drive device (not shown), bearings 45, 46 that connect the holder part 100 to the guide means 150, and a support member 40 that supports the bearings 45, 46 fixed to the container member 36. .41 and plate member 3
3 for opening and closing operation, the roller 48 that comes into contact with this L-shaped member 80, the L-shaped member 80 together with this roller 48, and the operation as shown by arrow B to pull down the plate member 33. However, a support member 47 that rotatably supports this roller 48, and a drive device (not shown) that performs this operation (however, the roller 48, support member 47, and this drive device are supported from outside the holder part 100). ). The holder part 100 having such a configuration is as follows:
When the X-ray film is sent from the transport section 20, the plate member 33 connects to the L-shaped member 80, the roller 48, and the support member 4.
7 and a drive device (not shown),
An intensifying screen 31.3 with an X-ray film 20OA attached to a plate member 33 and a container member 36 by transport rollers 73.74.
It is inserted between 2. 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 that connects them. Information board 63. 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 them, 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 that the supply magazine 10 and storage magazine 11 are replaced by an IP supply magazine 12. The storage magazine 13 is replaced with the noise canceling device 30, the holder part 100 is replaced with the IP holder part 101, and the supply part 19. The transport section 20° and the storage section 21 are the same as those used when using the aforementioned X-ray film. Therefore, these explanations will be omitted, and the holder part 1 will be omitted.
Only 01 will be explained. Note that the IP vehicle holder 101 is
While the X-ray film holder part 100 has the function of bringing the film into close contact with the intensifying screen, the iP holder part 1
01 does not require this, but since it is essentially the same, its configuration will be explained and its operation will be omitted. This holder part 101 is connected to the transport section 20 and storage means 21.
Conveyance rollers 75 and 76 driven by a drive device different from the roller and belt drive device used in A hinge 86 for movably supporting the instrument member 85, and an instrument member 85 that is an X-ray side source.
a plate member 27 with a low radiation absorption coefficient attached to the
From the contact mechanisms 9LA and 92B, which are comprised of springs for bringing the plate member 28 attached to the plate member 87 and the IP400 eight inserted between the two plate members 27.28 into close contact with these plate members 27.28. The holding means 180, the holding means 180, the holding means 180, the holding means 180, the holding means 180 which moves the holder part 101 to the photographing position 111 (FIG. 11), the two holding means 110, 120, the guiding means 150 consisting of a drive device (not shown), and the bearings 83, 8.
4 (same as 45.46 explained in Fig. 5),
Support members 121 and 122 that are fixed to the container member 85 and 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 this roller 48. At the same time, the L-shaped member 88 and the support member 47 that rotatably supports the roller 48 move in the direction shown by arrow B to pull down the plate member 87, and the drive unit (not shown) that performs this action. 1! I] device (however, the roller 48° support member 47 and this driving device are supported from outside the holder part 101). In addition, the barcode reader 5 provided at the top of the IP storage magazine 13
00, the barcode affixed to the back side of the IP 400 is read after the IP 400 is stored in the IP storage magazine 13.

Next, regarding the roller pressure adjustment mechanism targeted by the present invention,
This will be explained using FIG. In this Figure 1, the roller 6
5. Roller 66 is the same as described in FIGS. 2 and 5. A shaft 167 is provided coaxially with the roller 66, and a hem bearing 163 is attached to this shaft 167. This sliding bearing 163 is supported by a plate member 161 on the side plate 160. roller 6
5 is provided with a shaft 165 coaxially with the roller 66, and a sliding bearing 164 is attached to this shaft 165. The edge bearing 164 is supported at one end of the plate member 162, and this plate member 162 is rotatably supported by a pin 171 attached to the side plate 160, and the other end of this plate member 162 is supported by a pin 168. is installed. Further, a plate member 172 rotatably supported by a pin 173 is supported on the side plate 160, and the pin 170 is attached to one end of this plate member 172. The pin 168 and pin 1.70 are connected to the spring 16.
They are connected by 9. A roller 17 rotatable relative to the plate member 172 is provided at the other end of the plate member 172.
4 is attached, and an eccentric cam 175 is in contact with this roller 174. A motor 177 is attached to the rotational axis of the eccentric cam 175 via a speed reducer 176, which is attached to the side plate 160 (the attachment is shown in the illustration). That is, the plate members 162 and 172 are in the shape of levers with pins 171 and 173 as fulcrums, respectively, and when the eccentric cam 175 is in the position shown in FIG. and pull it up with roller 6.
5 applies roller pressure to the roller 66. Note that the spring constant of the spring 169 and the position of the pin 171 relative to the plate member 162 at this time are suitable for the roller pressure to convey the X-ray film. The position of the pin 173 and the amount of eccentricity of the eccentric cam 175 are determined by the rotation of the eccentric cam 175 by the motor 177 and the spring 1.
When the film 69 is further stretched, the roller pressure, which is greater than that when transporting the X-ray film, is suitable for transporting the IP. (The rotation angle of the eccentric cam 175 is detected, for example, by a potentiometer or the like, in order to maintain appropriate roller pressure when transporting the X-ray film and when transporting the IP.) Although one end side, that is, the side plate 160 side has been described, the other end is also similar. Also, the roller pressure adjustment mechanism is the rollers 65 and 66 in FIGS. 2 and 5.
However, other rollers such as 67 and 68 . The belt pulleys, such as 71 and 72 and 50 and 60, have similar roller pressure adjustment mechanisms.

In the F/IP cassette telephotography apparatus having the above configuration, when using X-ray film, the holder part is called the X-ray film holder part 100, and the supply magazine and storage magazine are called the X-ray film supply magazine 10. The X-ray film storage magazine 11 is used. And eccentric cam 1
The rotation angle of 75 is set so that the roller pressure is suitable for X-ray film. This allows the use of X-ray film. Further, when using IP, the holder part is the IP holder part 101, and the supply magazine and the storage magazine are the IP supply magazine 12 and the IP storage magazine 13. And eccentric force! , 175 is set such that the roller pressure is greater than that for X-ray film and is suitable for IP.

This enables the use of IP. As described above, when using X-ray film and when using IP, the optimal roller pressure can be achieved by the rotation of the eccentric cam 175 and the rotation of the motor 177, so problems such as skew and static can be prevented from occurring. I can do it.

Although this embodiment has described a roller pressure adjustment mechanism that can automatically change the roller pressure using a motor, an eccentric cam, etc., the invention is not limited to this.
For example, a rotary solenoid may be used in place of the motor, and a drive source such as a direct acting solenoid or an air cylinder may be used in place of the eccentric cam and rotary drive source.

Furthermore, the spring may simply be replaced.

Although this example describes an F/IP cassette-less copying device that can use both X-ray film and IP by replacing part of the holder, supply magazine, and storage magazine, it is possible to use X-ray film and IP as desired. It may also be a type that can be used by switching to .

〔Effect of the invention〕

According to the present invention, it is possible to maintain appropriate roller pressure when transporting the X-ray film and when transporting the IP.
It is possible to prevent problems such as skew and static marks from occurring.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of the roller pressure adjustment mechanism according to the embodiment of the present invention, FIG. The figure is a front view showing the general structure of the cassette-less fluoroscopic imaging table in the embodiment, FIG. 4 is a perspective view showing the general structure of the snapshot device, and FIG. 5 is the internal structure of the snapshot device when X-ray film is used. It is an explanatory diagram for explaining. 65.66...Conveyance roller, 169...Spring, 17
5... Eccentric cam, 177... Motor, 200...
X-ray film, 400...IP.

Claims (1)

[Claims] 1. A drive roller or drive belt capable of selectively conveying the X-ray film and the stimulable phosphor sheet, one of which is fixed to the conveyance path, and a pressing force applied to the drive roller or drive belt. In a cassette telephoto copying apparatus having at least one set of conveyance means consisting of an additional driven roller or driven belt, the conveyance means has an adjustment mechanism capable of adjusting the pressing force, and the adjustment mechanism adjusts the accumulation property. A cassette telephoto copying apparatus characterized in that the pressing force is greater when transporting a phosphor sheet than when transporting an X-ray film.