JPS6198341A - Radiation picture information recorder/reader - Google Patents

Abstract

PURPOSE:To superpose accumulative fluorescent sheets to attain photographing by forming a means for supplying accumulative fluorescent sheets to a picture recording part so that sheets are superposed and supported and a means for extracting each sheet after the irradiation of radiant rays and delivering the extracted sheet to a circulation course. CONSTITUTION:A sheet S1 is carried by an endless belt E1, guided to the surface of a guide belt G by a distribution belt E2 and then guided to the surface of an endless belt E3 in a picture recording part. Then, a filter F is moved to the surface of the sheet S1. The 2nd sheet S2 is carried and set up to/on the surface of the sheet S1 by the endless belt E1, the division belt E2 and the guide belt G. Under said state, radiant rays are irradiated to execute photographing for energy subtraction. After the completion of the photographing, the filter F is lifted upwards and then the sheet S1 is carried in the arrow direction. Then, the filter F is shunted in the horizontal direction and the remaining sheet S2 is discharged by the endless belt E3.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of the Invention) The present invention stores and records radiation image information on a stimulable phosphor,
Next, it is irradiated with excitation light, detects the light that emits stimulated light according to the accumulated and recorded image information, reads the image information and converts it into an electrical signal, and then converts the read image information into a visible image. Regarding radiographic image information recording/reading devices that regenerate images, more specifically, in radiographic image information recording/reading devices in which a stimulable phosphor is circulated and reused within the device, overlapping imaging or two-layer energy subtraction imaging is possible. The present invention relates to a device that enables the following.

(Technical Background and Prior Art of the Invention) Using a stimulable phosphor sheet, radiation image information of a subject such as a human body is recorded on the -H stimulable phosphor seed, and this is scanned with excitation light. A radiographic image information recording and reproducing method has been proposed that generates stimulated luminescence, photoelectrically reads the stimulated luminescent light to obtain an image signal, and processes this image signal to obtain a radiographic image of a subject that is suitable for diagnosis. (For example, JP-A-55-12429.

No. 56-11395, No. 55-163472, No. 5
No. 6-104645.

No. 55-116340, etc.). In this method, the final image may be reproduced as a hard copy or on a display device such as a CRT. In such a radiation image information recording and reproducing method, the stimulable phosphor sheet does not ultimately record image information, but temporarily stores image information in order to provide an image to the final recording medium as described above. This stimulable phosphor sheet may be used repeatedly because it supports
It is also extremely economical to use it repeatedly.

In addition, if a mobile station such as an X-ray imaging vehicle is equipped with such a recording/reading device for radiographic image information, and the device travels to various locations for group examinations and performs X-ray imaging, the accumulation of It is inconvenient to load a large number of phosphor sheets, and there is a limit to the number of sheets that can be loaded on a moving vehicle. Therefore, a stimulable phosphor sheet is made to be reusable and loaded onto a moving vehicle, and the radiological image information of the subject is recorded on it. If the radiation images are copied onto a recording medium and the stimulable phosphor sheet is reused, it is possible to take radiographic images of a large number of objects using a mobile vehicle, which is extremely useful in practice. Furthermore, if continuous imaging is performed through this cyclical reuse, it is possible to increase the speed of imaging in mass medical examinations, which has an extremely large practical effect.

In order to reuse the stimulable phosphor sheet in this way, one radiation energy remaining in the stimulable phosphor sheet after the stimulated luminescent light is read is converted into a
The stimulable phosphor sheet may be used again for recording radiation images by emitting it to erase residual radiation images by a method such as that shown in No. 2, No. 5G-12599.

On the other hand, in a method for recording and reproducing radiation image information using a stimulable phosphor sheet as described above, it has been proposed to perform superposition processing or energy subtraction processing. The former, for example, as disclosed in Japanese Patent Application Laid-open No. 11400/1983, images of the same subject are recorded on multiple sheets in order to reduce noise in the images.
After reading, the image signals are subjected to addition processing. In the latter method, for example, as disclosed in JP-A No. 59-83486, two or more sheets are stacked and a filter is interposed between them to convert the quality of the radiation. Radiographic images of different levels are recorded, and then subtraction is performed between these images.

For these processes, it is desirable to overlap two or more sheets in the image recording unit and irradiate them with radiation (in the case of energy subtraction, with a filter interposed between them). This is because it is also possible to record images of the same subject separately on each sheet that is fed in sequentially.
a<iT[lf! (7) In the case of ``660'', it is better to overlap the sheets and record them in one shot because it is possible to prevent the generation of false images due to the movement of the subject.

Therefore, there is an image recording section that irradiates the stimulable phosphor sheet with radiation through the subject, an image reading section that reads the image accumulated and recorded on the stimulable phosphor sheet, and an image that remains on the stimulable phosphor sheet after reading. The erasing section, which releases radiation energy and prepares for the next recording, is combined into one,
Adding the above-mentioned multiplex imaging function for superimposition processing or energy subtraction processing to a device that circulates and reuses stimulable phosphor sheets between each of these parts makes it possible to perform various functions with one device. makes it possible to obtain images,
Highly desirable.

(Objective of the Invention) The present invention, in response to the various demands mentioned above, allows for the circulation and reuse of a stimulable phosphor sheet for storing and recording radiation image information, allows for a compact design, and enables high-speed imaging. In radiographic image information recording and reading devices that are easy to install and move, and can be easily installed in screening types for mass medical examinations, storage fluorophores are also used for energy subtraction processing or superimposition processing. It is an object of the present invention to provide a device that can take pictures by overlapping sheets.

(Structure of the Invention) The radiographic image information recording/reading device of the present invention comprises an image recording section that records a radiographic image of the subject by exposing the subject to a stimulable phosphor sheet and recording the radiographic image of the subject; an image reading section having a photoelectric reading means that scans the body sheet with excitation light and reads the emitted stimulated luminescent light to obtain an image signal; It includes an erasing section for discharging the sheet, and a circulating conveying means for circulating the sheet to each section in order, and a storage phosphor sheet is placed in the image recording section, and the sheet is overlapped in the image recording section. The apparatus is characterized by comprising means for feeding the stacked sheets so as to be supported by the stacked sheets, and means for taking out the sheets after the stacked sheets are irradiated with radiation and sending them out to the circulation path.

When performing double-layer imaging for energy subtraction processing, it is necessary to supply a radiation quality conversion filter along with the sheets to the image recording section, and the supply means also supplies this filter. In addition, methods for interposing this filter between sheets include feeding sheets above and below the filter, feeding the filter between the sheets, or providing a sheet supply section for energy subtraction. Various known methods can be considered, such as a method of simultaneously feeding two sheets with a filter interposed between them from a supply section, but it goes without saying that any method may be used.

For superposition not for energy subtraction processing but for simple superposition processing (as shown in JP-A No. 56-11400, for example), it is sufficient to superimpose a plurality of sheets in the image recording section; In addition to the method of sequentially feeding multiple sheets into the image recording unit and overlapping them,
It is possible to provide a separate sheet supply section for overlapping and feed the sheets together from this separate supply section only when overlapping.

6. When two or more sheets are set one on top of the other in the image recording section for superimposition processing or energy subtraction processing, each sheet must be set without misalignment with respect to the other, so that the setting position Preferably, means are provided for accurately positioning each sheet.

Although the apparatus of the present invention performs a reading operation and subsequent erasing, the image signal obtained by the reading operation may be temporarily stored in a recording medium such as a magnetic tape or an F41 disk. , it may be displayed on a display such as a CRT for immediate observation, or it may be made into a hard copy and permanently recorded. The playback device for this is
It may be directly connected to the above device, it may be played back at a remote location via a storage device, or it may be placed at a remote location and receive signals wirelessly to play back the playback device.
To do - 6 moyo 0゛・this way 1 1'L''
- Example 2; j For example, it becomes possible to reproduce images taken by a moving vehicle on a reception/reproduction device at a hospital, and have a specialist observe the images and report the diagnosis results to the moving vehicle wirelessly.

In the present invention, a stimulable phosphor refers to a phosphor that, when irradiated with radiation, accumulates a portion of this group 118 ray energy internally, and when it is then irradiated with excitation light such as visible light, It refers to something that has the property of emitting photostimulated light from the mouth.

In the present invention, the stimulable phosphor sheet refers to a sheet-like recording medium made of the above-mentioned stimulable phosphor, and generally includes a support and a stimulable phosphor layer laminated on the support. It consists of The stimulable phosphor layer is formed by dispersing the stimulable phosphor in a suitable binder, and if the stimulable phosphor layer is self-supporting, it will itself contain the stimulable phosphor. It can be used as a light sheet.

In addition, in the case of energy subtraction treatment, the same type of stimulable phosphor sheet may be used,
Furthermore, for example, two or more types of stimulable phosphor sheets having different radiation absorption properties may be used, as described in Japanese Patent Application Laid-Open No. 59-83486. (It may also be for shadows). In this case, the radiation absorption characteristics are different, for example, when the absorption characteristics for the energy of the incident radiation are different, such as when the material of the phosphor itself is different, and when the absorption characteristics of the energy of the phosphor are different, such as when the material of the phosphor itself is unchanged Both cases where the ratio of the absorbed radiation dose to the incident radiation differs due to methods such as changing the thickness are shown. For high-energy radiation recording in energy subtraction, it has radiation absorption characteristics that have a higher radiation absorption rate on the high-energy side than usual, and it also has storage properties that increase the radiation absorption rate by thickening the phosphor layer. Target structures can be extracted well by using a phosphor sheet, and for low-energy radiation recording, by using a stimulable phosphor sheet that has radiation absorption characteristics such as a high radiation absorption rate on the low energy side. It is possible to obtain an energy subtraction image with good graininess.

Also, in the case of overlapping processing, the same type of stimulable phosphor sheet may be used, or
As described in No. 9, two or more different types of sheets are used so that the farther away from the radiation source the sheet is placed, the thicker the phosphor layer, etc., so that the sensitivity to radiation becomes higher. It's okay.

(Embodiment) Embodiments of the present invention will be described in detail below with reference to the drawings.

1 and 2 schematically show an example in which the apparatus of the present invention is capable of taking images for energy subtraction processing. Figure 2 shows one in which two circulation passages are formed in parallel.

In the example shown in FIG. circulation 11Q
A radiation quality conversion filter F is sandwiched in the circulation path so that the sheet is fed to the subject S side and the opposite side. That is, a radiation quality conversion filter F is arranged in the image recording section, and the sheet 1-81 is first supplied below this as shown by arrow A, and then another sheet S2 is supplied above this filter F as shown by arrow B. Then, after superimposing the two sheets S1 and 82 with filter F in between, radiation is irradiated from radiation source X to record an image for energy subtraction, and then the lower sheet S1 is moved as shown by arrow C. The sheet S2 is discharged from the image recording section and returned to the circulation path, and then the upper sheet S2 is discharged as shown by the arrow and also returned to the circulation path.

The circulation path includes a reading section and an erasing section, and the sheet is supplied to the image recording section again after passing through these processing sections.

Not for energy subtraction processing.

When superimposing imaging for normal superimposition processing, the radiation quality conversion filter F is removed from the image recording section, and only two (or three or more) sheets are superimposed in the image recording section. As a mechanism for ejecting the filter F, or feeding and discharging the sheet, various known sheet conveying or moving means can be employed, and there are no particular structural limitations. Practically speaking, it is preferable to use a type that is high-speed and does not damage the sheet surface.

In the example shown in Fig. 2, two circulation passages are provided in parallel, so a radiation quality conversion filter, F, is placed in the image recording section (preferably, it can be moved in and out). 2 so that sheets S2゜Sl are set on the top and bottom respectively.
Two circulation passages are constructed. In the illustrated example, a reading device is arranged in each of the two circulation paths, and the erasing device is configured to act in common on the two circulation paths. In this example as well, in the case of normal overlapping 19 shadows, the filter F is removed from the irradiation field of the image recording section and the sheets S1.$2 are directly overlapped. Moreover, the number of sheets may be such that several sheets are circulated in each circulation path.

In each of the embodiments shown in FIGS. 1 and 2 above, the filter F
An example of a method for removing the sheet from the image recording unit is to move it horizontally in a direction perpendicular to the direction in which the sheets 81 and 82 are conveyed (indicated by arrow Y), as shown in FIG. 3A. Various known mechanisms may be employed for this purpose, such as one in which the filter F is driven by a wire as shown in FIG. 3B.

The example of the sheet conveyance mechanism in the example of FIG.
This will be explained in detail with reference to Figures A-4G.

The sheet S1 is conveyed by an endless belt E1,
The swing portion is guided onto the guide belt G by the belt E2, and then onto the endless belt E3 in the image recording section. (FIGS. 4A and 48) Next, filter F is moved onto sheet S1.

(Fig. 4C) On top of this, the second sheet S2 is an endless belt El, and the swing portion is a belt E2. It is fed and set by the guide belt G. (FIG. 4D) In this state, radiation is irradiated and a positive shape for energy subtraction is performed.

After solidification, the filter F is slightly lifted upward (FIG. 4E), and then the sheet S1 is carried out in the direction of the arrow.

(FIG. 4F) By doing this, it is possible to prevent the surface of the sheet S1 from being scratched. Next, the filter F leaves in the lateral direction, and the remaining sheet S2 becomes the endless belt E3.
It is discharged by

Although the means for lifting the filter F upwards is not shown, it is easily possible by any mechanical method. In addition,
In the above example, the belt F2 may simply be a guide roller that guides the sheet S2 onto the filter F. Also, insert the filter F in the state shown in Figure 4A, and
A gap may be formed between the belt E3 and the endless belt E3, and the sheet S1 may be inserted into this gap. At this time, the angle of the belt E2 must be accurately controlled, especially for swinging.

Although the above-mentioned Figs. 4A-4G use an endless belt, an example using a magazine will be described below with reference to Figs. 5A-5F.

Feed rollers R1 and R2 are provided at the bottom of the magazine M, a discharge port P is formed in the end wall on the discharge side, and an opening for moving the filter F into and out of the magazine is formed above the discharge port P.

First, when the first sheet S1 is carried in from the right in the direction of the arrow (Fig. 5A), the filter F is inserted thereon (
Figure 5B). Next, a second sheet S2 is carried on top of it (FIG. 5C), and radiation is irradiated in this state. When the irradiation is finished, the filter F leaves the magazine M, and the upper sheet S2 falls onto the lower sheet S1 (Fig. 5D).
. Next, the feed rollers R1 and R2 at the bottom of the magazine M are driven to eject the lower sheet S1 (FIG. 5E). At this time, the upper sheet S2 comes into contact with the end of the filter F at the ejection side end of the magazine M and is not ejected. Note that the above steps (Figs. 5D and 5E) are reversed. In other words, the lower sheet S1 may be ejected before the filter F is ejected, and then the filter F may be ejected.Next, the sheet S2 remaining in the magazine may also be moved to the feed roller R.
1, discharge by R2 (Fig. 5F).

When magazine M is used in this way, sheet feeding is simplified, making operation easier.
``The advantages of this are 6.j, 1. In the above, we have explained the mode in which the sheets are fed and discharged one by one, but it is also possible to stack the sheets in advance upstream of the image recording section and then feed them to the image recording section. Alternatively, the image recording section may discharge the stacked sheets at the same time and transport them one by one to the circulation path downstream of the image recording section.

Next, a specific example of the radiation image information recording/reading apparatus of the present invention will be explained in detail with reference to FIG. In this example, the image recording section using the endless belt shown in FIGS. 4A to 4G described above is employed. The explanation of the structure 1 action of this part is as follows:
Since the details overlap with those shown in FIGS. 4A to 4G, the following description will be omitted.

FIG. 6 shows an embodiment of an apparatus of the present invention for photographing and recording radiographic images of the chest, abdomen, etc. while the subject is lying supine.
This is shown schematically. Inside the device 1 are endless belts 2A, 2B, 3.4.5°6.7, 8.9, 10. II
A, 11B, 12.13 and endless belt 3.4.7
．． 10.11.12.13 Guide rollers 4.15.16.17.18.19.20, other rollers 7A, 19A, guide plates 21.22° 23A,
238, 230, 24, 25, 26, 27, and the nip odor □ The part provided between 28A, 28B, and the endless belts 13 and 2A is installed in front of the belt 2C and the endless belts 1 to 10. two passages 10-17-19-1 that are parallel to each other in the middle;
A sheet circulation conveyance system is provided which constitutes a circulation path including 3 and 17A-11-18-12-19A.

In this sheet circulation conveyance system, for example, six stimulable phosphor sheets 30 are circulated and conveyed at appropriate intervals in the direction of the arrow in the figure.

Endless belt 2 arranged at the top of the circulation conveyance system
A photographing stand 41 is provided above A, and this photographing stand 4
A radiation source 42 such as, for example, X-rays m is provided at a position facing the endless belt 2A with the imaging table 41 and the radiation source 42 forming an image recording section 40. In addition, the image recording unit 40 Niha Radiation IIW [
gi#iAt, A2, A3 are installed to prevent scattered radiation from entering areas other than the recorded area.

Sheet 3 used for radiography of subject 43
0 is placed on the endless belt 2A, and the radiation source 42 is irradiated with the subject 43 lying supine on the imaging table 41. As a result, a transmitted radiation image of the subject 43 is projected onto the sheet 30 on the endless belt 2A, and the subject 43 is projected onto the sheet 30 on the endless belt 2A.
3 radiographic image information is accumulated and recorded on the sheet 30.

Endless belt 2A hand # (right 1llIl in Figure 1)
), the belt 2G distributes two stimulable phosphor sheets 30 above and below the radiation quality conversion filter F for energy subtraction photography or superposition photography in the former case, and distributes them above and below the radiation quality conversion filter F in the latter case. This is to be placed overlapping the endless belt 2AF, and during normal photographing, it is fixed and the sheet 30 is simply conveyed between them.

In the illustrated example, one of the two parallel passages (10
-17-19-13) constitutes a normal circulation passage, and the other (17A -11-18-12-19A
> is used to supply a sheet exclusively for photographing for energy subtraction or superimposition, and is normally not driven during copying. If you use only one special sheet and the second sheet for multiplex photography is also used as a sheet for normal copying, the latter sheet should be used in the normal circulation path (10
-17-19-13). The conveyance direction changing plate 29 is for selectively conveying the sheet 30 into one of the two parallel paths, and is controlled by a controller (not shown) to move the sheet 30 into a predetermined path. invite.

The stimulable phosphor sheet 30 on which a radiation image has been recorded in the image recording section 40 is shown in FIGS. 4E to 4G or 5D to 5F when energy subtraction or superposition imaging is performed. The sheet is transferred onto the endless belt 2B by a sheet discharging means as shown in FIG.

In this embodiment, at the right end position in the figure of the sheet circulation conveyance system,
An image reading section 50 is provided. In this image, 1 1 in the reading section 50, the engine 1 constituting the reading section 50,
A laser light source 51 is installed above the dress belt 8, and a mirror 53 for scanning the output laser light 52 in the width direction of the sheet 30 on the endless belt 8. Galvanometer mirror 54. Miller 55. A mirror 56 is provided and the galvanometer mirror 54 swings back and forth to cause the laser beam 52 to be main-scanned over the sheet 30 on which the radiation image has been accumulated and recorded. Note that this sheet 30 is
After the radiation image is recorded in the image recording section 40, the sheet is conveyed to the image reading section 50 by driving the sheet circulation conveyance system. Further, a condensing reflection mirror 57 is disposed along the main scanning line at the scanning position of the laser beam 52 on the sheet 30, and the stimulated luminescence light emitted from the sheet 30 by the irradiation of the laser beam 52 is directly or condensed. reflective mirror 51
After being reflected, the light enters the condensing optical element 58 from the incident end surface 58A of the condensing optical element 58, and is received by the photomultiplex 59 connected to the exit end surface 58B of this element 58 while being guided through the condensing optical element 58 by total reflection. The stimulated luminescence light is read out photoelectrically. At the same time as the main scanning of the laser beam 52 is carried out as described above, the sheet 30 is conveyed by the endless belt 8 in the direction of the arrow in the figure, that is, in the main scanning (a direction substantially perpendicular to the scanning direction), and the sheet 30 is carried in the sub-scanning. The accumulated radiation image information is read over the entire surface of the sheet 30. The image signal read by the photomultiplier 59 is sent to an image processing circuit (not shown) and undergoes necessary image processing (for example,
After energy subtraction processing described in JP-A No. 59-83486, superposition processing described in JP-A-56-11399, gradation processing, frequency processing, etc.), the image is sent to an image reproducing device. Sent. As mentioned above, this reproducing device may be a display such as a CRT, a recording device that performs optical scanning recording on a photosensitive film, or a device that temporarily records data on a storage device such as a magnetic tape for that purpose.

Note that the time required to read the radiation image information from one sheet 30 is generally longer than the time required to record (photograph) the radiation image information on the sheet 30, but the recorded sheet 30 may be transferred to an endless belt, for example. By leaving them on the top, the six sheets 30 can be used one after another and recording can be completed within a short period of time. Furthermore, as shown in JP-A No. 58-89245, prior to the above-mentioned reading operation (main reading) to obtain a visible image for observation and interpretation, excitation light with a lower intensity than that to be irradiated in the main reading is used. A reading operation (pre-reading) to grasp the accumulated recorded information of radiation image information recorded in NvJ on the stimulable phosphor sheet in advance using excitation light of the same level.
By doing this, you can grasp the accumulated recorded information of radiographic image information, and then perform actual reading, and adjust the reading gain appropriately based on the pre-read information, or perform appropriate signal processing, to prevent changes in molding conditions. However, in this apparatus, the sheet 30 sent onto the endless belt 9 is transferred to the endless belt 9 and the endless belt 7.8 after reading the image. By reversing the image and returning it to the reading position, the above [pre-reading] is performed.

You can do "book reading".

The sheet 30 whose image has been read is sent to the erasing section 70 by the endless belt 9. This erasing section 70 includes a box 71, a large number of fluorescent lamps arranged inside the box 71,
It consists of an erasing light source 12 such as a tungsten lamp, a xenon lamp, a sodium lamp, etc., and a sheet 30.
is conveyed by the endless belt 9 after the shutter 73 is opened until its tip touches the nip roller 27. The sheet 30 is then sent into the box 71 by the rotating nip roller 28A. Sheet 30 is box 7
1, the shutter 3 is closed. The erasing light source 72 inside the box 71 mainly emits light in the excitation wavelength range of the stimulable phosphor of the sheet 30, and the radiation energy remaining in the sheet 30 after reading the image is transferred to the sheet 30. When such light is irradiated, it is emitted from the sheet 30. At this time, since the shutter 73 is closed, the erasing light does not leak and enter the image reading section 50, thereby preventing noise from being generated in the read signal.

The sheet 30 on which the afterimage has been erased to the extent that radiation image information can be recorded again is Niplow 1 728
B 'li: [1lil 1liii c' u T
A *“701”1886・”1・j The sheet 30 that was taken out is attached to the endless belt 10.13.

The sheets are conveyed onto the endless belt 2A of the image recording section 40, but if another sheet 30 is stuck first, they are sequentially placed on the endless belt 13, 10 and processed. Further, when the image recording and reading operations are completed for the time being, the last sheet 30 undergoes afterimage erasure in the erasing section 70, and then is sent onto the endless belt 9 by rotating the nip roller 28A in the opposite direction. and waits on the belt 9.

In addition, when using a sheet 30 dedicated to energy subtraction or superposition photography, these sheets 30
are waiting on the endless belts 11A and 11B.

As explained above, the endless belts 2B, 2A to 13 and the nip roller 2 constituting the sheet circulation conveyance system
8A and 28B are cut in conjunction with the operations of the image recording section 40, image reading section 50, and erasing section 70 (this can be done by employing known sequence control), and the sheet 30 is conveyed or placed. do.

Furthermore, when performing multiple imaging for energy subtraction or superimposition processing, the sheets 30 are supplied and held in a state of being folded together in the image recording unit (), so that these multiple imaging can be easily performed. be able to.

(Effects of the Invention) As explained above, according to the radiation image information recording/reading device of the present invention, the image recording section, image@reading section, and image erasing section are integrated, and the stimulable phosphor sheet is used to separate these sections. Since the device can be reused cyclically, the device can be made compact, and the image recording section is configured to perform multiple imaging for energy subtraction processing or superimposition processing, so a single device can be used for a variety of purposes. Radiographic image information can now be obtained, which is extremely advantageous for diagnosis.

[Brief explanation of drawings]

Figure 1 shows the release l2JI! of the present invention! A schematic diagram showing one embodiment of the if image information recording/reading device; ゛ Fig. 2 is a schematic diagram showing another embodiment;
The figure is a plan view explaining the operation of the mechanism for moving the filter in the device, FIG. 3B is a perspective view thereof, and FIGS. 4A to 4G are explanations explaining the operation of an example of the image recording section in the above device of the present invention. 5A to 5F are explanatory diagrams similarly explaining the operation of the other side, and FIG. 6 is an overall diagram showing a more specific example of the apparatus of the present invention. 1...Device main body 2A...Endless belt in shadow position 2B...Endless belt in standby position 3.4, 5, 6, 7, 8, 9,
10,11,12.13... Endless belt 14.
15.16, 17.17A, 18, 19.19A
, 20...Guide roller 21, 22, 23Δ, 23
3. 23G, 24, 25, 26.27...Guide plates 28A, 28B...Nip roller 29...Conveyance direction changing plate S1, S2.30.30A, 30B...
Accumulative phosphor sheet 41T... dance shadow stand 42X
...Radiation source 43S...Subject 50...
...Image reading section 70... Erasing section Fig. 1 Fig. 2 Fig. 3A Fig. 4B

Claims (1)

[Scope of Claims] 1) Circulating conveyance means for conveying at least two stimulable phosphor sheets capable of accumulating and recording radiation images along a predetermined circulation path; an image recording section that accumulates and records a radiographic image of the subject on the sheet by irradiating radiation through the subject; an excitation that scans the sheet on which the radiographic image has been accumulated and recorded in the image recording section in the circulation path; an image reading unit having an excitation light source that emits light; a photoelectric reading unit that reads stimulated luminescence light emitted from a sheet scanned by the excitation light to obtain an image signal; A radiation image information recording/reading device comprising an erasing section that releases residual radiation energy on the sheet prior to recording an image on the sheet after the image has been read in the reading section. , at least two of the sheets are supplied to the image recording unit so that the sheets are supported in a stacked manner in the image recording unit, and after the stacked sheets are irradiated with radiation, the image is recorded. A radiation image information recording/reading device comprising a sheet supply/discharge means for taking out the sheet from the recording section and discharging the sheet so as to be conveyed to the circulation path. 2) The radiation image information recording/reading apparatus according to claim 1, wherein the supply means inserts a radiation filter between at least two sheets together with the sheet. 3) The supply means supplies the sheet to the image recording section.
3. A radiation image information recording/reading apparatus according to claim 1 or 2, wherein the radiation image information recording/reading apparatus is one in which the radiation image information is sequentially supplied one by one. 4) Claim 1, wherein the stimulable phosphor sheet is two or more types of stimulable phosphor sheets.
3. The radiation image information recording/reading device according to any one of Items 3 to 3.