JPS61246737A - Spot shot device - Google Patents

Abstract

PURPOSE:To prevent the title device from miscarrying with a simple constitution by sending an accumulative phosphor sheet to conductive and elastic carrying rollers and detecting the nonconduction of current between the carrying rollers. CONSTITUTION:The accumulative phosphor sheets 11 are set up on a feeding part and each sheet 11 is sucked by sucking parts 13A, 13B, 16 of a frame body 100. The sucked sheet 11 is carried t the carrying rollers 19. The carrying rollers 19 are constituted of conductive rollers 111a, 111b fitted to shafts 113, 114. Then, a relay 116 is turned on and the sheet 11 is sucked by the sucking parts 13, 16 to send the sheet 11 to the carrying rollers 19. Consequently, current flowing into the carrying rollers 19 is nonconductive, the sheet 11 is delivered, and after sending the back end part of the sheet 11, current is supplied to the rollers 19, so that the carrying of the sheet is detected by a detector 18. Then, the sheet 11 is sent to a holder part of the device to record/reproduce data on the sheet 11. Since the delivery of the bak end part ofthe accumulative phosphor sheet is detected by the carrying rollers 19and the sheet 11 is carried again, the device prevented from nmiscarrying can be simply constituted.

Description

[Detailed Description of the Invention] [Technical Field of the Invention] The present invention belongs to the field of medical equipment for diagnosis, and more specifically, for example, uses a stimulable phosphor sheet for recording and reproducing radiographic images in large quantities and continuously. The present invention relates to a spot shot device that performs radiographic imaging.

[Technical background of the invention and its problems] Certain phosphors are exposed to radiation (X-rays, α-rays, β-rays.

When irradiated with γ-rays, ultraviolet rays, etc., part of the energy of this radiation is accumulated in the phosphor. When the phosphor is then irradiated with excitation light such as visible light, the fluorescence increases depending on the accumulated energy. The body exhibits stimulated luminescence. A phosphor exhibiting such properties is called a stimulable phosphor.

Using this stimulable phosphor, radiation image information transmitted through the human body, etc. is recorded on a sheet of stimulable phosphor, which is then scanned with excitation light to produce stimulated luminescence. A method has been proposed in which the image signal is read out to obtain an image signal, and the image signal is processed to obtain an image suitable for diagnosis.

This final image may be reproduced as a hard copy or on a CRT. In such a radiographic image binary reproduction method, a stimulable phosphor sheet (strictly speaking, it can take various forms such as a panel-shaped one or a drum-shaped one, but here it is called a stimulable phosphor sheet) (hereinafter referred to as the "image plate" and hereinafter abbreviated as IP) is used to perform readout irradiation for photostimulation after irradiation of 11m18 shadows, and after the recorded image is read out. It has the property of being able to be recycled and used about 1000 times, making it highly economical.
It has come to be used in radiological diagnostic equipment.

As a radiological diagnostic apparatus using IP having such excellent features, the applicant has previously applied for a patent showing the following configuration.

That is, as shown in FIG. 3, there is an XIi tube 2 for irradiating the subject (patient) with X-rays, and a top plate 3 placed below the X-ray tube 2 on which the subject is placed. , a spot shot device 4 disposed at the bottom of the top plate and including an IP transport path, and
The image system 5 includes an image intensifier that converts X-rays emitted from the ray tube 2 and transmitted through the subject into electrical signals. Furthermore, from X-ray tube 2,
Two types of X-rays are used: X-rays for projecting a transmitted image of the object on the IP, and X-rays for displaying the transmitted image on a display (not shown) as an X-ray transmitted image via the image intensifier. be exposed to radiation.

The spot shot device 4, the details of which are shown in FIG. 4, is roughly divided into a supply section 10 that takes out and supplies IPll, a secondary erasing section 20 that erases the noise of the extracted IPll, and a conveying section that transports the noise-eliminated IPll. A special equipment section 3o that is once on standby with the special equipment section 3o, a light shielding section 40 that blocks the light from the secondary erasing section 20, and an I that is temporarily on standby in the special equipment section 30.
It is comprised of a holder part 50 that transports and holds the Pll to a photographing position, and a storage section 60 that transports and stores the photographed IPll.

The supply unit 10 includes I stacked in the feed magazine 12.
The take-out mechanism section 15, which includes suction sections 13A, 138.16 and a vacuum pump 14, moves in the direction of the arrow along a guide groove 103 formed on a side plate (not shown) to adsorb the IPll and transfer it to the delivery roller. Send to 19. Thereafter, the secondary erasing section 20 having a reflecting mirror 23 and a halogen lamp 22 is transferred, and a plurality of rollers 33a, 3
3b, 34a, 34b and 35 are held between belts 31 and 32, and the tip of IPll is connected to the detection member 3.
It is conveyed until it is detected at 6 and stops.

Note that 37 is a guide plate for giving the belt a curved surface.

After that, multiple 17) O-ra 53a, 53b,
54a, 54b, 56a, 56b, 5
7a, 57b and a wide belt 51, 52 stretched within a guide plate 59.
1 is transported and stopped at the position shown. Then, the holder part 50 is transported in a direction perpendicular to the plane of the drawing, that is, in the direction indicated by the arrow in FIG.
When the ata shadow ends, it returns to the position shown in Figure 2 again. Thereafter, the wide belts 51 and 52 rotate, and the rPll held in the middle is sandwiched between a belt 61 and a roller 62 stretched between a pair of rollers, and sent to the feed mechanism roller 63, and the pick-up magazine 65 layered inside.

The applicant previously filed an application for the imaging stand with the above configuration, and while conducting research, discovered points that could be improved.

That is, in the special equipment section 30, since the sensor 36 for stopping the IPll at this position is located at the end of the special equipment section 30 as shown in the figure, the IPll after secondary erasure is smoothly moved between the belts 31 and 32. If the belt falls upward or downward without being held by the belt, the belt of the special mechanism section 30 will continue to rotate and may not be able to stop. If such an accident occurs, it can be said that there is a risk that various parts inside the photographing stand may be damaged by the IPll.

In addition, the start and stop signals in the supply section 10, secondary erasing section 20, and special equipment section 30 are detected and controlled by microswitches placed at each position on the conveyance path, so they have the disadvantage of lack of reliability. had.

[Object of the Invention] The present invention was made in view of the above-mentioned circumstances, and an object of the present invention is to provide a spot shot device having a simple configuration and extremely high reliability.

[Summary of the Invention] In order to achieve the above object, the present invention (a) takes out a plurality of stacked unphotographed stimulable phosphor sheets one by one and transports them to a photographing position by a transport mechanism, and after photographing is completed, the transport mechanism In a spot shot device that stores a photographed stimulable phosphor sheet in a magazine, the stimulable phosphor sheet, which forms one component of the transport mechanism and is formed of a conductive elastic material, is held and transported. a pair of conveyance rollers,
A power supply means for supplying current between the pair of conveyance rollers, and a detection means for detecting current non-conduction between the pair of conveyance rollers, and an output signal of the detection means drives at least the conveyance mechanism. It is characterized by controlling.

[Embodiment of the Invention] Next, the configuration of an embodiment of the present invention will be described with reference to FIGS. 1 and 2.

FIG. 1 is a specific perspective view of the supply section 10 in FIG.
16 is provided, and a vacuum pump 14 as shown in FIG. 4 is connected thereto.

Further, the reason why only one suction portion 16 protrudes downward is to attach corrugations to the IPll as shown in the figure. This prevents IPll from sagging. Furthermore, the delivery roller 19 has a configuration unique to the present invention.

That is, the pair of shafts 113 and 114 are conductive, and a pair of conductive rubber rollers 111a and 111b are fixed to each of the shafts 113 and 114, respectively. Note that the roller 112 is a roller for corrugating the IPll, and does not need to be conductive. A relay 116 and a power source 117 are connected to the shaft 113 via a slip ring or the like, and a contact detector 118 that generates a signal when the current is not conducted is connected to the shaft 114 via a slip ring or the like. There is. In addition, the relay 116
is a guide groove 103 that guides the movement of the extraction mechanism section 15.
It is operated by a signal from a detection member (not shown) arranged along the guide groove 103.
It turns on when it reaches a predetermined position along the line.

In addition, the control circuit for controlling the above-mentioned configuration is shown in Figure 2 (
It is constructed as shown in a). That is, the extraction mechanism section 1
An ON signal generated when the roller 5 moves and reaches the predetermined position is supplied to the drive motor 70 of the delivery roller 19 and the connection detector 118.

The output signal from the connection detector 118 is then supplied to the vacuum pump drive motor 71 for operating the adsorption section.
The operation of the vacuum pump 14 is controlled.

Further, the output signal from the connection detector 118 is further
It is also supplied to the Y circuit 72 and generates a pulse one hour after the fall of the output signal from the connection detector 118. This output is supplied to a conveyor belt drive circuit 73 and a lamp control circuit 74, and the belts 31 and 32 of the special equipment section 30 and the lamp 22 of the secondary erasing section 20 are controlled.

Next, the operation of the structure of the above embodiment will be explained with reference to FIG. 2(b).

First, the IPll stacked in the feed magazine 12 is sucked by the suction parts 13A, 13B, etc. of the take-out mechanism section 15, and is guided by the guide groove 103 to move in the direction of arrow U. Then, a detection member (not shown) provided approximately in the middle of the guide groove 103 detects that the extraction mechanism section 15 has passed, turns on the relay 116 in FIG.
Generates a pulse as a TART signal. This pulse causes the delivery roller 19 to rotate. Then, the take-out mechanism section 15 further moves in the U direction, and the adsorbed IPll is held by a delivery roller 19 made of conductive rubber and sent out. Due to the passage of this IPll, the pair of delivery rollers 19 are disconnected from each other, so
The signal rises as shown in FIG. 2(b). At the same time, the halogen lamp 22 in the secondary erasing section 20 is turned on, and the vacuum pump 14 in the supply section 10 stops operating.

Furthermore, at the same time, the belts 31 and 32 within the special machine section 30 start rotating. Then, IPll is transported to the special equipment section 30 while being secondarily erased, and is conveyed while being held by belts 31 and 32. Therefore, the rear end of the IPll is
After passing through flJ, these rollers 19 are brought into close contact again and become conductive, causing the signal to fall. When this falling signal occurs, the DrLAY circuit 72 starts operating and t
A pulse is generated during the rR interval. For the past hour, the IP
This is set in advance, taking into account the time it takes for ll to stop at a predetermined position within the special equipment section 30. This pulse causes the secondary erasing lamp 22 and the belts 31 and 32 to stop their operations, and the IPll that has undergone the secondary erasing is placed in a standby state within the special equipment section 30.

After that, the holder part 50 is
The IPll is transported to
0 to the storage section 6o and stored in the pickup magazine 65.

As described above, according to the above embodiment, the rear end of the IP in the conveyance direction is detected by the feed roller and the conveyance of the IP is controlled. It can be reduced as much as possible. In addition, multiple movable parts such as the vacuum pump, secondary erase lamp, and belt can all be controlled based on the signal from the feed roller only, so position detectors that were previously placed in the conveyance path can be controlled. It is possible to significantly reduce the number of , making it possible to have a very simple configuration.

It should be noted that the present invention is not limited to the above-mentioned embodiment, and for example, the rotation start of the delivery roller does not necessarily need to be detected from the movement of the take-out mechanism, and may be activated by an external signal.

[Effects of the Invention] According to the present invention described above, it is possible to provide an extremely excellent spot shot device that has a simple configuration and is highly reliable.

[Brief explanation of the drawing]

FIG. 1 is a schematic explanatory diagram showing the ejection mechanism part in the present invention,
Fig. 2 is a control block diagram and time chart for controlling the supply section, secondary erasing section, and special equipment section, Fig. 3 is an explanatory diagram showing a general X-ray diagnostic device, and Fig. 4 is its spot shot device. FIG. 2 is a schematic diagram of the internal structure of. 4... Spot shot device, 10... Supply section 20... Secondary erasing section, 30... Special equipment section 40...
Light shielding part, 50...Holder part 60-...Storage part, 1
11a, 11 lb - Gomuro 5117... Power supply, 118... Contact detector Kensuke Norichika, patent attorney
1 idiot) 1st! ! ! 1 Figure 2 (a) Figure 2 (b) Conveyor belt -j
L-Figure 3

Claims (1)

[Claims] In a spot shot device in which a plurality of stacked unphotographed stimulable phosphor sheets are taken out one by one by a conveyance mechanism and conveyed to a photographing position, and after photographing is completed, the photographed stimulable phosphor sheets are stored in a magazine by the conveyance mechanism. , a pair of conveyance rollers forming one component of the conveyance mechanism and pinching and conveying the stimulable phosphor sheet made of a conductive elastic material, and supplying current between the pair of conveyance rollers; and a detection means for detecting current non-conduction between the pair of conveying rollers, and controlling at least the driving of the conveyance mechanism based on an output signal of the detection means. .