JPS5866931A - Radiation picture information recording and reading device - Google Patents

Abstract

PURPOSE:To permit cyclic reuse and to obtain homogeneous reproduced images by running a recording body produced by lamination of a storage type phosphor endlessly, storing and recording the transmitted radiation pictures of an object thereon, and releasing the residual radiation energy on the recording body after the pictures are read. CONSTITUTION:A recording body 1 is fed intermittently at each 1/4 the overall length thereof by means of a driving roll 4. While said body is not running, a radiation source 8 is lighted and the transmitted radiation picture of an object 9 is stored and recorded on the storage type phosphor 3 of the body 1 which is extended between driven rolls 6 and 7. The body 1 stopped in the position between the rolls 4 and 5 is scanned by the excitation light emitted from an excitation light source 10 and said light is inputted to a photodetector 12 by which the light is converted photoelectrically, and the electrical picture signal corresponding to the radiation picture is outputted. The body 1 stopped in the position between the driven rolls 5 and 6 in the next stoppage is irradiated by a light source 4 for erasing to release the radiation energy, by which the formed radiation picture is erased and the recording body is reset to a reusable state.

Description

[Detailed Description of the Invention] The present invention stores and records radiation image information on a stimulable phosphor,
Next, it is irradiated with excitation light, the light that emits stimulated light according to the accumulated and recorded image information is detected, the image information is read and converted into an electrical signal, and then this read image information is converted into a visible image. The present invention relates to a radiographic image information recording/reading device for reproducing radiation image information, and more particularly to a radiographic image recording/reading device in which a stimulable phosphor is cyclically reused within the device.

When certain phosphors are irradiated with radiation (X-rays, alpha-rays, beta-rays, gamma-rays, ultraviolet light, etc.), some of the energy of this radiation is stored in the phosphor, and then the phosphor is When irradiated with excitation light such as visible light, the phosphor exhibits stimulated luminescence depending on the accumulated energy. A phosphor exhibiting such properties is called a stimulable phosphor.

Using this stimulable phosphor, radiation image information of the human body, etc. is once recorded on a sheet of stimulable phosphor, which is then scanned with excitation light to cause stimulated luminescence, and this stimulated luminescent light is converted into a photoelectron. A method has been proposed in which an image signal is obtained by reading out the image, and this image signal is processed to obtain an image suitable for diagnosis.

(For example, JP-A-55-12429, JP-A-56-1139)
No. 5, No. 55-163472, No. 56-104645
This final image may be reproduced as a hard copy or on a CRT. In any case, in this radiation image information recording and reproducing method, a stimulable phosphor sheet (strictly speaking, it can take various forms such as a panel or a drum) is used. , collectively called “
Since the sheet (hereinafter referred to as "sheet") does not ultimately record image information, but temporarily carries image information in order to provide the image to the final recording medium as mentioned above, this accumulation property is The phosphor sheet may be used repeatedly, and such repeated use is extremely economical.

In order to reuse the stimulable phosphor sheet as described above, the radiation energy accumulated in the stimulable phosphor sheet after the stimulated luminescence light is read is used, for example, in Japanese Patent Laid-Open No. 56-113
92, No. 56-12599, the radiation image can be erased, and the stimulable phosphor sheet can be used again for recording radiation images. In the actual device, the stimulable phosphor sheet after the reading is completed is supplied to an image erasing device by a conveying means such as a belt conveyor, and the stimulable phosphor sheet from which the radiation image has been erased is further processed as described above. It is also possible to save labor by sending the image back to the image recording unit using a suitable conveyance means.

However, it is extremely difficult to design and manufacture a conveying means that can convey a sheet-like substance such as the above-mentioned stimulable phosphor sheet without causing problems such as clogging or catching.

Furthermore, it goes without saying that the stimulable phosphor sheet must not be damaged by scratches or the like during transportation, and from this point of view, the manufacturing of the transportation means becomes difficult.

Also, if some sheets are played back immediately after being recorded, and some sheets are temporarily stored after being recorded (and then played back together with a series of other sheets),
The order in which the sheets are used becomes completely different, and the sheets returned to the image recording section gradually become a mixture of new and old sheets. If new sheets and old sheets coexist in this way, the quality of the reproduced image will vary depending on the sheet used, making it impossible to obtain a homogeneous reproduced image. Therefore, it is desirable to replace old sheets with new sheets as appropriate, but in order to perform such sorting replacement, it is necessary to inspect the image quality of the reproduced image of each sheet or to manage the number of times it has been used. Therefore, it must be determined whether the seat should be replaced with a new one or whether it should be continued to be used. It is extremely troublesome to control the quality of each sheet in this way.

The present invention has been made in view of the above circumstances, and it is possible to reuse a stimulable phosphor for recording radiation images without damaging it, and to obtain a homogeneous reproduced image.
Moreover, it is an object of the present invention to provide a radiation image information recording/reading device that is easy to design, manufacture, and manage.

The radiation image recording/reading apparatus of the present invention includes a recording body formed by laminating a stimulable phosphor capable of accumulating and recording radiation energy on an endless support, a recording body driving means for driving the recording body endlessly, and a recording body driving means for driving the recording body endlessly. An image recording unit that accumulates and records a transmitted radiation image of a subject on a part of the recording body by irradiating radiation through the subject; an excitation light source that emits excitation light for scanning the radiation image stored and recorded on the recording medium; and a photoelectric reading means for photoelectrically reading the stimulated luminescence light emitted from the recording medium scanned by the excitation light to obtain an image signal. and an erasing means for emitting residual radiation energy on the recording medium prior to recording an image on the recording medium after the image reading is performed in the image reading section. It is characterized by: As mentioned above, the device of the present invention performs operations up to reading radiographic images, but if the electrical image signals obtained by the reading operations are input to various playback devices, for example, hard copies, CRT displays, etc. It goes without saying that you can get it.

In the radiation image recording/reading device of the present invention having the above configuration, the stimulable phosphor for recording radiation images is laminated on an endless support such as an endless belt, drum, or disk. Since this support is run endlessly by the recording medium driving means, the stimulable phosphor can be cyclically reused while being erased by the erasing means. Of course, the mechanism that allows an endless belt or drum to run endlessly is one that uses a sheet of stimulable phosphor.
It can be formed more easily than a mechanism that transports sheets one by one, and since stimulable phosphors are laminated on a support and circulated by driving this support, There is no possibility that it will be damaged. 1 more
Since one recording medium is reused cyclically, a stable and homogeneous reproduced image can always be obtained. If the recording medium deteriorates and the quality of the reproduced image deteriorates, the recording medium can be replaced with a new one, making it easy to control the quality of the recording medium.

In the present invention, a storage fluorophore refers to radiation (X-rays, α
When irradiated with radiation (beta-rays, β-rays, n-rays, ultraviolet rays, etc.), a portion of this radiation energy is accumulated internally, and then when excitation light such as visible light is irradiated, stimulated luminescent light with an amount of light corresponding to the accumulated energy is generated. Refers to two things that have the property of emitting .

In the present invention, S is that the wavelength range of excitation light and the wavelength range of stimulated luminescence light do not overlap.

/N ratio, and it is preferable to select the excitation light source and the stimulable phosphor so as to satisfy such a relationship. Specifically, as disclosed in Japanese Patent Application Laid-Open No. 55-12492, the excitation light wavelength is from 6'00 to 6'00.
700 nm K', the wavelength of stimulated luminescence light is 3oo to 5o.

It is desirable to set the value to nm.

In this way, it emits stimulated luminescence light of 300 to 500 nm,
Examples of stimulable phosphors that can be preferably used in the present invention include rare earth element-activated alkaline earth metal fluorohalide phosphors [specifically, JP-A No. 55-12143
( Ba 1-x-y , M
gx, Cay) FX: aEu” (X is C
1 and Br, X and y are O<x+y≦0.6・and Xy\O, and a is 1
o-6≦a≦5X10-2), □ JP-A-55-1
It is described in Publication No. 2145 (Ba 1-x
t MIIx −') F X:yA (However, Mll is M
g, Ca, Sr, Zn and Cd/4. ．． 1, X is the lesser of C1, Br and I (6 is also 1°, A is Eu, Tb, Ce, Tm, D
y, Pr, Ho, Nd, ybA and Er, X is 0≦X≦06, y is 0≦y≦02), etc.; ZnS: Cu, Pb, Ba0qxA720a:
Eu (however, 0.8≦X≦10) and MIIO・x
8i02: A (However, L Mll is Mg, Ca, S
r, Zn,' Cd or Ba, A is Ce, T
b. Eu.

Tm, Pb, Tll, Bi and 1 to Mn, X
is 0.5≦X,≦2.5); and JP-A-55-
LnOX described in Publication No. 12144: xA (
However, Ln is at least one of La, Y, Gd, and Lu, and X is at least one of C1 and Br (both one,
A is at least one of Ce and Tb, X is 0 (
X (0, 1): etc. Among these, rare earth element-activated alkaline earth metal fluorohalide phosphors are preferred, but among these, barium fluorohalides, which are shown as specific examples, are particularly excellent in stimulable luminescence. Therefore, it is preferable.

Furthermore, metal fluorides are added to barium fluoropilide phosphors as disclosed in JP-A-56-2385 and JP-A-56-2386, or Japanese Patent Application No. 54-150873. As disclosed in the specification, the addition of at least one of a metal chloride, a metal bromide, and a metal iodide is preferable because the stimulated luminescence is further improved.

Further, as disclosed in Japanese Patent Application Laid-Open No. 55-163500, when the phosphor layer of a stimulable phosphor plate prepared using the above-mentioned stimulable phosphor is colored with a pigment or dye,
This is preferable because the sharpness of the finally obtained image is improved.

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

FIG. 1 shows a first embodiment of the invention. In this embodiment, an endless belt-shaped recording medium 1 is used. This endless belt-shaped recording body 1 is
As shown in an enlarged view in FIG. 2, a storage phosphor 3 is laminated on the surface of a highly flexible endless belt-shaped support 2. The endless belt-shaped recording body 1 is
The drive roller 4 is hooked on the cylindrical drive roller 4 and three similarly cylindrical driven rollers 5, 6, and 7, and is rotated by a drive device (not shown), making it possible to travel in the direction of the arrow in the figure. . A radiation source 8 is disposed at a position facing the recording medium 1 stretched between the driven rollers 6 and 7.

This radiation source 8 is, for example, an X-ray source, and the driven roller 6
．． A transmitted radiation image of a subject 9 placed between the recording body 7 and this radiation source 8 is projected onto the recording body 1 at the above position. At a position facing the recording medium 1 stretched between the driving roller 4 and the driven roller 5, there is an excitation light source 10 that emits excitation light such as a laser beam, and the excitation light emitted from this excitation light source 10 is recorded. An optical deflector 11, such as a galvanometer mirror, which scans in the width direction of the body 10. A photodetector 12 is provided for reading stimulated luminescence light emitted by the stimulable phosphor 3 excited by the excitation light. The photodetector 12 is, for example, a head-on type photomultiplier tube, a photoelectron amplification channel converter, or the like, and photoelectrically detects the stimulated luminescence light guided by the light transmission means 13. An erasing light source 14 is provided at a position facing the recording medium 1 between the driven rollers 5.6. This erasing light source 14 releases the radiation energy stored in the stimulable phosphor 3 by irradiating the stimulable phosphor 3 with light included in the excitation wavelength region of the phosphor. For example, a tungsten lamp, a halogen lamp, an infrared lamp, a laser light source, etc. as shown in Japanese Patent Application Laid-Open No. 11392/1984 may be arbitrarily selected and used. Note that the radiation energy stored in the stimulable phosphor 3 is, for example, as shown in Japanese Patent Application Laid-Open No. 12599/1983,
Since the stimulable phosphor can also be emitted by heating, the erasing light source 14 may be replaced by heating means. A cylindrical cleaning roller 15 is provided at a position facing the driven roller 6 with the recording medium 1 in between and in contact with the recording medium 1. This cleaning roller 15
is rotated counterclockwise in the figure by a drive device (not shown), and removes dirt and flakes attached to the surface of the recording medium 1 that moves while contacting the cleaning roller 15 from the surface of the recording medium 0. and, if necessary,
It may be formed into something that attracts the above-mentioned dust and debris using electrostatic phenomenon.

Regarding the material, structure, and usage of the light transmission means 13, please refer to Japanese Patent Application Laid-open Nos. 55-87970, 56-11397, 56-11396, 56-11394, and 5.
The methods and methods disclosed in No. 6-11398, No. 56-11395, etc. can be used as they are.

The operation of the apparatus of this embodiment having the above structure will be explained below. The recording medium 1 is intermittently fed by a drive roller 4 by 1/4 of its total length. When the recording medium 1 is stopped, the radiation source 8 is turned on, and the transmitted radiation image of the subject 9 is accumulated and recorded on the stimulable phosphor 3 of the recording medium 1, which is stretched between the driven rows 6 and 7. . The portion where the radiation image is accumulated and recorded is located between the driving roller 4 and the driven roller 5 when the recording medium 10 is stopped one after another. The stimulable phosphor 3 of the recording medium 1 stopped at this position is scanned by the excitation light emitted from the excitation light source 10. The excitation light is scanned in the width direction of the recording medium 1 by the optical deflector 11 (main scanning), and is also transmitted through the excitation light source 10, the optical deflector 11. Photodetector 1
2. A stage (not shown) that fixes the light transmission means 13 is moved in the length direction of the recording medium 1, so that the recording medium 1 is scanned in the longitudinal direction (sub-scanning). A stage that moves as described above can be easily formed using a known linear movement mechanism. When irradiated with the excitation light, the recording medium 1
The stimulable phosphor 3 emits stimulated light according to the image information stored and recorded. This stimulated luminescence light is transmitted to the light transmission means 1
3 to the photodetector 12 for photoelectric conversion, and the photodetector 12 outputs an electrical image signal corresponding to the radiation image stored and recorded in the stimulable phosphor 3 . The portion of the recording medium 1 whose image has been read in this manner will be located between the driven rollers 5.6 at the next stop. The stimulable phosphor 3 of the recording medium 1 stopped at this position is exposed to the erasing light source 14.
radiation energy that remained after the reading operation and trace amounts of 266Ra mixed in the stimulable phosphor.
It emits radiation energy caused by radiation emitted from radioactive isotopes such as or 40 or by environmental radiation.

Therefore, if the radiation image formed on the stimulable phosphor 3 is erased by radiographic image recording, and if the device has not been used for a long time, the stimulable phosphor Radiation energy based on the radiation from radioactive isotopes or environmental radiation accumulated in 3 is also released, returning it to a reusable state.

Next, when the recording medium 1 in the area where the radiation image has been erased is sent between the driven rollers 6 and 7, the surface of the recording medium 10 is swept away by the cleaning roller 15, removing fine dust and flakes on the surface of the recording medium 10. is removed. The recording medium 1 from which the radiation image has been erased and dust and flakes have been removed in this manner is stopped between the driven rollers 6 and 7 and reused for recording the radiation image.

As described above, the recording medium 1 is cyclically reused while being erased and cleaned by the erasing light source 14 and the cleaning roller 15. Considering a certain part on the recording medium 1, this part undergoes image recording, image reading, and image erasing processes as the recording medium l moves once as explained above. Of course, when the recording medium 1 is stopped and an image is being recorded on a certain part of the recording medium 1, image reading and image erasing may be simultaneously performed on other parts of the recording medium 1. If the image recording, image reading, and image erasing processes are simultaneously performed on different parts of the recording medium 1, the image processing speed will naturally be improved.

In the above embodiment, the stimulable phosphor 3 is laminated on an endless belt-like support 2, and this support 2 is circulated to be reused. Unlike the case of transporting stimulable phosphors one by one, there is almost no risk of damaging the stimulable phosphors. The mechanism for circulating the stimulable phosphor can also be easily designed and manufactured, since it can be constructed using only an endless belt drive mechanism. In addition, since one recording medium 1 is reused, a homogeneous reproduced image without variations depending on the sheet can be obtained.

The electrical image signal output from the photodetector 12 may be immediately input to a reproduction device to obtain a hard copy, CRT display, etc., or may be digitized and recorded on a magnetic tape, magnetic disk, or optical disk. It is also possible to temporarily record the data on a high-density recording medium such as, etc., and then play it on a reproducing device. When a radiographic image recording/reading device is used for medical diagnostic imaging by being mounted on a circulating pass, for example, the reading and recording of image signals is performed at the radiation imaging site, and the high-density recording as described above is performed. If the medium is taken back to, for example, a medical center and regenerated there, the weight of the moving equipment can be reduced. Furthermore, the above-mentioned image signals may be input to the reproducing device and the recording medium at the same time. In other words, when used in a hospital, the image signal is transmitted from the radiography room to a recording medium for record storage, and at the same time, this image signal is transmitted to a reproducing device such as a CRT in the examination room so that it can be used for diagnosis immediately after imaging. It is also possible to make it possible to do so.

Furthermore, prior to reproducing the radiographic image, it is possible to perform signal processing on the image signal to enhance the image, change the cone trust, etc. It is desirable to perform such signal processing. Desirable signal processing used in the present invention includes JP-A-55-87970 and JP-A-56-11.
No. 038, Japanese Patent Application No. 54-151398, No. 54-15
No. 1400, No. 54-151402, No. 5°4-16
Frequency processing disclosed in No. 8937 etc., JP-A-55
-116339, 55-116340, 55-
Examples include gradation processing disclosed in No. 88740 and the like.

In the embodiment described above, the sub-scanning for reading the radiation image is performed by moving the excitation light irradiation system and the photostimulation light reading system with respect to the stopped recording medium 1.
On the other hand, the excitation light irradiation system and the photostimulation light reading system may be fixed and sub-scanning may be performed by moving the recording medium. In such a case, when the recording body 1 is stopped to record a radiographic image, the recording body 1 is moved at a sub-scanning speed after the recording of the radiographic image is completed, and reading is performed while the recording body is moving. I'll see if I do. Furthermore, if the radiation image is recorded while moving the recording medium 1 using, for example, slit exposure, it is possible to record and read the radiation image without stopping the recording medium 1.

In the first embodiment described above, an endless belt-shaped recording body 1 that is flexible and can be bent freely is used, but the durability of the recording body and the Considering the formation of radiographic images, it is preferable to form the recording body with rigidity and avoid bending it during use. Figures 3 and 4 show recording bodies with such rigidity. A second embodiment of the invention, in which a body is used;
This shows a third embodiment. In the embodiment shown in FIG. 3, the recording medium 101 is formed by laminating a stimulable phosphor on the peripheral surface of a drum-shaped support. In this recording body 101,
The driving force of a drive shaft 104a of a drive device (not shown) is transmitted by a chain 104b, and the recording medium 101 is intermittently rotated in the direction of the arrow with a predetermined stop period in between. An excitation light source 110, a light deflector 111, a photodetector 112, a light transmission means 113, an erasing light source 114, and a cleaning roller 115 are arranged around the drum-shaped recording medium 101.

The apparatus shown in FIG. 3 differs from the apparatus shown in FIG. 1 only in the shape of the recording medium 101 and the driving method, and by the same operation as the apparatus shown in FIG. The recording medium 101 is scanned by excitation light emitted from an excitation light source 110, and an electrical image signal carrying a radiation image is output from a photodetector 112.

In the embodiment shown in FIG. 4, the recording medium 201 is formed by laminating a stimulable phosphor 203 on the side surface of a disc-shaped support 202. The recording body 201 is intermittently rotated by 1/4 rotation in the direction of the arrow by a drive shaft 204a of a drive device (not shown) and a chain 204b. An image recording zone 205 is set on the stimulable phosphor 203, and a transmitted radiation image of the object (not shown) of the stimulable phosphor 203 in this area is accumulated and recorded. An image reading sheet 7 is located at a position 180 degrees away from this image recording zone 205.
206 is set, and in this image reading zone 206, an image reading device (not shown) consisting of an excitation light source, a scanning means such as a light deflector, a photodetector, a light transmission means, etc. as described above is arranged. . An erasing light source 208 surrounded by a light shielding member 207 is provided downstream of the image reading zone 206, and a cleaning light source 208 is provided at a position further downstream of the erasing light source 208 and upstream of the image recording zone 205. A roller 209 is provided. In the apparatus shown in FIG. 4 as well, the recording medium 201 is erased and cleaned by the erasing light source 208 and the cleaning roller 209 while being cyclically reused. In the apparatus shown in FIG. 4, since the stimulable phosphor 203 moves within one plane, the erasing light emitted from the erasing light source 208 covers the image recording zone 205 and the image reading sheet 7206. A light shielding member 207 is provided to prevent irradiation. Such a light shielding member has a first structure in which the stimulable phosphor moves three-dimensionally;
In the second embodiment as well, it may be provided as appropriate.

In the above-mentioned third embodiment and also in the above-mentioned second embodiment, the recording body is formed to have rigidity and will not be bent, so it has better durability and finer image quality than an endless belt-like recording body. Excellent in terms of ease of playback and production - 5 points.

In the three embodiments described above, all the endless recording bodies are moved intermittently by 1/4 rotation, but the pitch of rotation is not limited to the above values. Of course, in the apparatus shown in FIG. 3, for example, the recording medium may be stretched in a triangular shape and moved continuously by 173 rotations. Furthermore, it is not always necessary to make the erasing zone independent from the image recording zone or the image reading zone (for example, by disposing the erasing light source in the image reading zone, Turn off the erasing light source while reading.
It is also possible to erase the image by turning on the erasing light source when the image reading is completed. In such a case,
It is also possible to move the recording medium in steps of 1/2 rotation. Although it is not always necessary to clean the recording medium with a cleaning roller, by performing such leaning, a higher quality radiation image can be obtained.

It should be noted that the recording state (or recording pattern) of the radiation image information accumulated and recorded on the stimulable phosphor sheet is grasped prior to the reading operation, and the reading gain of the photoelectric reading means is set.
It is preferable to determine an appropriate recording school factor and set signal processing conditions in order to obtain radiographic images with excellent diagnostic performance. (・Reading with excitation light energy (hereinafter referred to as ``pre-reading'')) After that, a reading operation (hereinafter referred to as ``main reading'') to obtain a radiographic image used for diagnosis (hereinafter referred to as ``main reading'') is provided. Patent application (1), (2), (3)
), (4), and (5) (applicant Nifuji Photo Film Co., Ltd., agent: Masashi Yanagita and one other person) are proposed in the application specification. In the present invention, such pre-reading is also performed by separately providing a pre-reading reading section having a similar configuration upstream of the image reading section, or by using the image reading section for both pre-reading and main reading. This request can be satisfied. Regarding the details of the device configuration, those described in the above application specification are used.

As explained in detail above, the radiation image recording and reading device of the present invention enables the stimulable phosphor to be recycled and reused without damaging it, and provides stable and homogeneous perforation images. It is. In addition, quality control of the recording medium is easy, and since the structure is simple, design and manufacture are easy, and the device can be easily made smaller and lighter. Therefore, the device of the present invention is most suitable for being carried on a bus or the like and is extremely convenient in practice.

[Brief explanation of drawings]

FIG. 1 is a schematic diagram showing a first embodiment of the present invention, FIG. 2 is a side view showing an enlarged part of the embodiment of FIG. 1, and FIG. 3 is a schematic diagram showing a second embodiment of the present invention. FIG. 4 is a schematic diagram showing a third embodiment of the present invention. 1.101.201...recording body 2.202...
Support 3.203...Storage phosphor 4...Drive roller 8.108...Radiation source 9,109...
Subject 10.110... Excitation light source 11.111
...Light deflector 12.112...Photodetector 13.
113...Light transmission means 14.114.208...Erasing light source 104a, 204a...Drive shaft 1
04b, 204b... Chain 205 ・
...Image recording zone 206 ...Image reading zone Figure 1 Figure 2 Figure 3 Figure 4 (Voluntary) procedural amendment December 24, 1980 To the Commissioner of the Japan Patent Office 1 Indication of the case 1988 Patent application No. 165118 No. 2 Name of the invention Radiographic image information recording/reading device 3 Relationship with the case for amendment Patent applicant 4 Attorney 5 No date of amendment order 6 Number of inventions increased by amendment None. 9. Attached documents: type engraving statement
l Letter of (voluntary) procedural amendment December 24, 1971 II Dear Commissioner of the Japan Patent Office 1 Indication of the case 1982 r Patent Application No. 165118 Li 3 Person making the amendment Relationship with the case Patent applicant 4 Agent 5 The undated amendment order "Japanese Unexamined Patent Application Publication No. 55-12492"
No. 29- is corrected.

Claims (1)

[Claims] A recording medium formed by laminating a stimulable phosphor capable of storing and recording radiation energy inside an endless support;
A recording body driving means that drives the recording body endlessly; an image recording unit that accumulates and records a transmitted radiation image of the subject on the recording body by irradiating a part of the recording body with radiation through the subject; An excitation light source is disposed on the downstream side of the recording medium, and is configured to emit excitation light for scanning the radiation image accumulated and recorded on the recording medium, and to read the stimulated light emitted from the recording medium scanned by the excitation light. an image reading section having a photoelectric reading means for obtaining an image signal; and a residual radiation energy on the recording medium prior to recording an image on the recording medium after the image reading is performed in the image reading section. A radiation image information recording/reading device characterized by comprising an erasing means for emitting.