JPH02278250A - Radiographic information reader - Google Patents

Abstract

PURPOSE:To miniaturize an overall device and to exactly erase the radiographic information remaining on an accumulating phosphor sheet after a reading operation by arranging an erasing light source at a housing part which houses the accumulating phosphor sheet and irradiating the accumulating phosphor sheet with an erasing light at the housing part. CONSTITUTION:On the top part of the housing magazine 20 of the housing part 22, an erasing mechanism 32 which erases the remaining radiographic information is arranged and the remaining radiograph of the accumulating phosphor sheet 12 housed in the housing magazine 20 is erased. The erasing mechanism 32 is provided with the erasing light source 28. Then the accumulating phosphor sheet 12 housed in the housing magazine 20 is irradiated with the erasing light from the erasing light source 28, and the radiographic information remaining on the accumulating phosphor 12 is erased after the reading operation. Thus the remaining radiograph is exactly erased and the device overall miniaturized is obtained at a low cost.

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to a radiation image information reading device using a stimulable phosphor sheet, and particularly to a radiation image information reading device that uses a stimulable phosphor sheet. The present invention relates to a radiation image information reading device having an erasing means for erasing information.

<Prior Art> Recently, radiographic image recording and reproducing systems that obtain radiographic images of subjects using stimulable phosphors have been attracting attention.

A stimulable phosphor is a material that emits radiation (X-rays, α-rays, β-rays, γ-rays,
When exposed to irradiation with electron beams, ultraviolet rays, etc., a portion of the radiation energy is accumulated, and when later irradiated with excitation light such as visible light, it emits stimulated luminescence according to the accumulated energy. Refers to a light body.

A radiation image information recording and reproducing system utilizes this stimulable phosphor, and records radiation image information of a subject or subject on a sheet (with a layer made of a stimulable phosphor).
Accumulated and recorded on a stimulable phosphor sheet (hereinafter referred to as a stimulable phosphor sheet),
This stimulable phosphor sheet is scanned with excitation light such as a laser to generate stimulated luminescence light, and the resulting stimulated luminescence light is read photoelectrically to obtain an image signal. Based on this image signal, the image of the subject is The radiation image is recorded on a recording material such as a photographic light-sensitive material or C.
This is to output it as a visible image to RT or the like.

This type of radiographic image information recording and reproducing system is useful for medical diagnosis using the human body because it can obtain radiographic images rich in information with a much lower exposure dose than conventional radiography. It is extremely advantageously used in direct medical radiography such as X-ray photography for the purpose of medical treatment.

In addition to being used as a means for recording medical images as described above, such radiation image information recording and reproducing systems have come to be used for various purposes in various fields.

For example, the present applicant has disclosed an electron microscope image recording and reproducing method using such a radiation image information recording and reproducing system in Japanese Patent Application Laid-open Nos. 81-51738 and 61-93539.

This electron its mirror image recording and reproducing method basically irradiates a stimulable phosphor sheet that stores electron energy with an electron beam that has passed through a sample in a vacuum state, and then irradiates the stimulable phosphor sheet with excitation light. The accumulated energy is released as stimulated luminescence light, and this stimulated luminescence light is detected photoelectrically to obtain an image signal, and this image signal is used to reproduce the electron microscope image of the sample. be.

<Problems to be Solved by the Invention> By the way, in such various radiation image information recording and reproducing systems, the stimulable phosphor sheet is not for ultimately recording image information, but for recording as described above. Since the stimulable phosphor sheet only temporarily holds radiation image information in order to provide an image to the medium, it is extremely economical to use this stimulable phosphor sheet repeatedly.
And convenient.

To reuse a stimulable phosphor sheet, after reading is performed by irradiation with excitation light, the remaining radiation energy in the stimulable phosphor sheet is released by irradiation with erasing light to create the remaining radiation image. , and then use the stimulable phosphor sheet again for recording radiation images.

Therefore, various radiation image information recording and reproducing systems, especially radiation image information reading devices, include a radiation image information reading section (hereinafter referred to as a reading section) for photoelectrically reading radiation image information stored and recorded on a stimulable phosphor sheet. ), a radiation image erasing unit is provided which erases the radiation image information remaining on the stimulable phosphor sheet after reading and makes the stimulable phosphor sheet usable for the next radiation image recording operation. provided.

Such a radiation image erasing section is provided, for example, as an erasing area between the reading section and a storage section having a storage magazine or the like for storing the stimulable phosphor sheet after reading, and the radiation image erasing section is provided as an erasing area between the reading section and the storage section having a storage magazine or the like for storing the stimulable phosphor sheet after reading. While transporting the stimulable phosphor sheet, the transport is stopped if necessary, and the stimulable phosphor sheet is irradiated with an erasing light source to erase the remaining radiation image information.

By the way, in order to record and reproduce radiation image information more accurately, it is necessary to completely erase the radiation image remaining on the stimulable phosphor sheet after reading.

Therefore, it is necessary to lengthen the conveyance distance of the erasing area and to use a larger erasing light source, which increases the size of the erasing section, which in turn increases the size of the entire device and increases its cost.

An object of the present invention is to solve the problems of the prior art described above, and to provide a radiation image information reading device using a stimulable phosphor sheet, the entire device can be made small and inexpensive. It is an object of the present invention to provide a radiation image information reading device which is capable of reliably erasing radiation image information remaining on a stimulable phosphor sheet after reading.

<Means for Solving the Problems> In order to achieve the above object, a first aspect of the present invention provides a supply section that supplies a stimulable phosphor sheet on which radiation image information is accumulated and recorded, and a an image information reading unit that irradiates the body sheet with excitation light to emit the radiation image information as stimulated luminescence light, and photoelectrically reads the stimulated luminescence light; and a stimulable fluorescence read by the image information reading unit. The storage section includes a storage section for storing a stimulable phosphor sheet, and an erasing light source disposed in the storage section, and in the storage section, erasing light is emitted from the erasing light source onto the entire surface of the stimulable phosphor sheet after reading is completed. Provided is a radiation image information reading device characterized in that radiation image information remaining on the stimulable phosphor sheet is erased by irradiating the stimulable phosphor sheet.

A second aspect of the present invention also includes a supply unit that supplies a stimulable phosphor sheet on which radiographic image information is stored and recorded, and a supply unit that irradiates the stimulable phosphor sheet with excitation light to radiate the radiographic image information. an image information reading section that emits the stimulated luminescent light and photoelectrically reads the stimulated luminescent light; a storage section that stores the stimulable phosphor sheet read by the image information reading section; and the image information reading section. In the radiation image information reading device, the radiation image information reading device includes an erasing section for erasing radiographic image information remaining on the stimulable phosphor sheet, which is provided between the storage section and the stimulable phosphor sheet. Provided is a radiation image information reading device characterized in that an erasing light source for erasing radiation image information is provided.

<Operation of the invention> The first feature of the radiation image information reading IA device of the present invention! In the first method, an erasing light source is disposed in a storage section that stores the stimulable phosphor sheet whose radiation image information has been read in the image information reading section, and the erasing light source is applied to the stimulable phosphor sheet in this storage section. This method performs irradiation to erase residual radiation images.

Therefore, there is no need to separately provide an area for erasing residual radiation image information, which is provided in conventional radiation image information reading devices, and the entire device can be made smaller and cheaper. Furthermore, residual radiation image information can be sufficiently erased while reading the next radiation image information.

Further, in the second aspect of the present invention, an erasing section is further provided between the image information reading section and the storage section, and an erasing light source is also provided in the storage section, so that both the erasing section and the storage section are provided with an erasing light source. This is to erase residual radiation images.

Therefore, the erasing section can be made smaller than in conventional devices, and the entire device can be made smaller and cheaper. In addition, it is possible to irradiate the stimulable phosphor sheet with erasing light for a long time after reading is completed.
The residual radiation image information can be erased better and more reliably, and it is also possible to reduce the amount of light of each erasing light source.

<Embodiments> Hereinafter, regarding the radiation image information reading device according to the present invention,
DESCRIPTION OF THE PREFERRED EMBODIMENTS A detailed description will be given of preferred embodiments shown in the accompanying drawings.

FIG. 1 is a plan view of the radiation image information reading device according to the first aspect of the present invention, and FIG. 2 is a side view of the radiation image information reading device shown in FIG. FIG. 3 similarly shows a side view seen in the direction of arrow 111.

The illustrated radiation image information reading device 10 (hereinafter referred to as reading device 10) photoelectrically reads the radiation image information stored and recorded on the stimulable phosphor sheet 12, and basically the radiation image information is A supply section 16 in which a supply magazine 14 loaded with the stored and recorded stimulable phosphor sheet 12 is disposed, and a radiation image information reading section that photoelectrically reads the radiation image information stored and recorded on the stimulable phosphor sheet 12. 1
8 (hereinafter referred to as the reading unit 18), and the stimulable phosphor sheet 1 whose radiation image information has been read by the reading unit 18.
2, and a storage section 22 in which a storage magazine 20 for storing 2 is arranged.

The supply unit 16 includes a supply magazine 14 loaded with the stimulable phosphor sheet 12 before reading, a supply magazine mounting table 34 on which the supply magazine 14 is placed, and an elevating device 36 for raising and lowering the supply magazine mounting table 34. , and a conveyance means 38 for conveying the stimulable phosphor sheet 12 to the reading section 18 before being read.

The supply magazine 14 is a box with an open top and an end facing the reading section 18 .

The supply magazine mounting table 34 on which the supply magazine 14 is placed is configured to be movable up and down by an elevating means 36. For example, every time one stimulable phosphor sheet 12 is supplied, The height of the stimulable phosphor sheet 12 is increased by the height of the stimulable phosphor sheet 12 to facilitate the conveyance of the stimulable phosphor sheet 12 to the reading section 18 by the conveyance means 38.

In the illustrated example, the conveyance means 38 is an air suction cup that can move six times in the vertical direction and forward and backward in the conveyance direction of the stimulable phosphor sheet 12, and sucks the stimulable phosphor sheet 12 loaded in the supply magazine 14 before reading. The paper is supported and supplied one by one to the platen 24 of the reading section 18.

Note that the conveying means applied to the reading device 10 implementing the present invention is not limited to this, and may include various rollers,
Various methods such as a belt conveyor, means for pushing the rear end surface of the stimulable phosphor sheet 12, etc. can be used.

A schematic diagram of the reading section 18 is shown in FIG.

The reading unit 18 basically includes a platen 24 that supports and fixes the stimulable phosphor sheet 12, and a reading mechanism 26 that photoelectrically converts and reads radiation image information accumulated and recorded on the stimulable phosphor sheet 12 (see , see Figure 3).

The platen 24 has an inwardly convex cylindrical surface 24a, and a drive roller 40 is provided at the lower end of the cylindrical surface 24a.
Three rollers 42 are arranged which follow the driving roller 4o while sandwiching the stimulable phosphor sheet 12 therebetween.

Further, on the cylindrical surface 24a of the platen 24, means for fixing the stimulable phosphor sheet 12, such as a succinct mechanism, is arranged.

That is, the stimulable phosphor sheet 12 is withdrawn and supplied from the supply section 16 to the reading section 18 by the conveyance means 38, and is sandwiched between the drive roller 40 and the roller 42 along the cylindrical surface 24a as shown in FIG. 4, for example. It is transported to a predetermined position and fixed.

This platen 24 is placed on two guide rails 44 so as to be movable in the direction of the arrow, and a lower end convex portion 46 of the platen 24 is screwed into a drive screw 50 connected to a motor 48.

Therefore, the C1 platen 24 is configured to be movable on the guide rail 44 in the direction of the arrow A between the position shown by the solid line and the position shown by the dashed line in the figure by the rotation of the motor 48, and the stimulable phosphor sheet 12 sub-scanning conveyance means are constituted.

A reading mechanism 26 is arranged above the platen 24 (
(See Figure 3).

A schematic diagram of the reading mechanism 26 is shown in FIG.

The reading mechanism 26 irradiates the stimulable phosphor sheet 12 by main-scanning the laser beam 52a emitted from the laser light source 52 in the direction of arrow B' using the deflection mirror 54. The radiation image information accumulated and recorded on the stimulable phosphor sheet 12 is read by photoelectrically reading the stimulated luminescent light at the position irradiated onto the stimulable phosphor sheet 52a with a photomultiplier 56.

The laser light 52a irradiated from the laser light source 52 is
The light passes through a filter 58 that cuts off unnecessary wavelengths of light, passes through an acousto-optic modulator (AOM) 60 to have its intensity adjusted, is reflected by a mirror 62, and enters a half mirror 64.

The laser beam 52a transmitted through the half mirror 64 enters a photodetector 66 and its intensity is measured. In the reading mechanism 26, A
The OM 60 is controlled so that the intensity of the laser beam 52a passing through the AOM 60 is constant.

On the other hand, the laser beam 52a reflected by the half mirror 64
The beam diameter is adjusted by the beam expander 68,
The light is incident on the dichroic mirror 70.

The dichroic mirror 70 is configured to reflect a portion of the incident laser light 52a, and the reflected laser light 52a passes through a condenser lens 72 and an aperture 74 and enters a photodetector 76. The photodetector 76 detects the incident position of the laser beam 52a, and depending on the detection result, the laser beam 52a is detected by the mirror 62 and the half mirror 64.
Adjust the optical axis of 2a.

The laser beam 52a that has passed through the dichroic mirror 70 is incident on the deflection mirror 54 and is reflected and deflected. The deflection mirror 54 has a reflective surface inclined at 45 degrees with respect to the laser beam 52a, and is connected to a spindle motor 78 to rotate at high speed in the direction of arrow B.

Further, a condensing lens 80 is disposed in the optical path of the laser beam 52a reflected by the deflection mirror 54, and the laser beam 52a is reflected by the deflection mirror 54.
A is focused on a desired spot. Note that this condenser lens 80 is configured to rotate at high speed integrally with the deflection mirror 54.

Since the deflection mirror 54 rotates at high speed in the direction of arrow B as described above, the laser beam 528 reflected by the deflection mirror 54 and focused on the condenser lens 80 travels on the stimulable phosphor sheet 12 in the direction of arrow B. Main scan in the ' direction. At the same time, as described above, the platen 24 moves I3 in the direction of the arrow A, so that the stimulable phosphor sheet 12 is conveyed in the sub-scanning direction, and the laser beam 52a scans the stimulable phosphor sheet 12 two-dimensionally.

The deflection mirror 54 is arranged on the central axis of the cylindrical surface 24a of the platen 24 so as to reflect the laser beam 52a, and the optical path length of the laser beam 52a from the reflection position to the stimulable phosphor sheet I2 is always constant. It is configured so that

From the laser beam 52a irradiation position of the stimulable phosphor sheet 12, stimulated luminescence light 82 is emitted according to the accumulated and recorded image information.
is emitted.

The stimulated luminescence light 82 is made into parallel light by passing through the condensing lens 80, is reflected by the deflection mirror 54, travels in the opposite direction along the optical path of the laser light 52a, and is directed to the dichroic mirror 7.
It is reflected upward at 0.

The stimulated luminescent light 82 reflected by the dichroic mirror 70 is converged by a converging lens 84, passes through an aperture 86, and enters a photomultiplier 56.

The photomultiplier 56 photoelectrically detects this stimulated luminescence light 82 and outputs a read image signal.

This read image signal is processed in an image reading circuit (not shown) and then input to various reproducing devices such as a CRT and an optical scanning recording device, where it is displayed as a visible image or reproduced as a hard copy.

When the reading section 18 finishes reading the image information of the stimulable phosphor sheet 12, the platen 24 has moved to the position shown by the dotted chain line in FIGS. 1 and 4 as described above. Here, the aforementioned driving roller 40 rotates to convey the stimulable phosphor sheet 12 downward, and after reading, the stimulable phosphor sheet 12 is held between the driving roller 40 and the roller 42 and placed in the storage section 22. and stored in the storage magazine 20 of the storage section 22.

The storage magazine 20 is a box with an open top, and stores the stimulable phosphor sheet 1 after reading the radiation image information.
2 is conveyed by drive rollers 40 and rollers 42, and dropped from platen 24 into storage magazine 20.

In the present invention, the storage magazine 20 of this storage section 22 is
An erasing mechanism 32 for erasing residual radiation image information is disposed above the storage magazine 20, and the remaining radiation image on the stimulable phosphor sheet 12 stored in the storage magazine 20 is erased.

The erasing mechanism 32 has an erasing light source 28,
The stimulable phosphor sheet 12 stored in the storage magazine 20
By irradiating erasing light from this erasing light source 28, the radiation image information remaining on the stimulable phosphor sheet 12 after reading is erased.

The erasing light source 28 applied to the reading device 10 of the present invention is not particularly limited as long as it can irradiate light in the excitation wavelength range of the stimulable phosphor sheet 12, such as a fluorescent lamp, an incandescent lamp, or a sodium lamp. , halogen lamps, xenon lamps, etc. are applicable.

In the first aspect of the present invention, the storage section 22
An erasing light source 28 is arranged at the stimulable phosphor sheet 1.
By configuring the device to erase the remaining radiographic image information in step 2, the entire reading device 10 can be made inexpensive and compact, and the remaining radiographic image information can be sufficiently erased during the next radiographic image reading. can do.

FIG. 6 is a plan view of the radiation image information reading device according to the second aspect of the present invention, and FIG. 7 is a side view of the radiation image information reading device shown in FIG. Similarly, FIG. 8 shows a side view seen in the direction of the arrow ■.

The radiation image information reading device 100 of the illustrated example (hereinafter referred to as the reading device 100) uses radiation image information accumulated and recorded on a stimulable phosphor sheet 12, similar to the reading device 10 of the first aspect of the present invention described above. It photoelectrically reads the stimulable phosphor sheet 12, and basically includes a supply section 16, a reading section 18, a storage section 22, and a sheet feeding section that transports the stimulable phosphor sheet 12 from the supply section 16 to the reading section 18 before being read. system 102 and reading section 18
and an erasing section 104 provided between the storage section 22 and the stimulable phosphor sheet 12 for erasing radiation image information remaining on the stimulable phosphor sheet 12 after reading.

Here, in the radiation image information reading device of the second aspect of the present invention, a similar erasing mechanism 32 is provided not only in the erasing section 104 but also in the storage section 22, and in the erasing section 22, the reading section
The residual radiation image information is erased while the stimulable phosphor sheet 12 is conveyed from the storage section 8 to the storage section 22, and the stimulable phosphor sheet 12 is also erased in the storage section as well.

Reading device 100 shown in FIGS. 6, 7 and 8
Since the supply section 16, the reading section 18, and the storage section 22 have the same configuration as the above-described reading device 10, the same members are given the same numbers and the explanation thereof will be omitted.

In the reading device 100, a sheet conveyance system 102 for conveying the stimulable phosphor sheet 12 before reading is arranged between the supply section 16 and the reading section 18.

The sheet conveyance system 102 includes a pair of rollers 106 and 108 for conveying the stimulable phosphor sheet 12 to the reading section 18, a guide member 109 disposed between the pair of rollers 106 and 108, and a pair of rollers 108 that rotates. Motor 11
2.

When the stimulable phosphor sheet 12 before being read is conveyed to the pair of rollers 106 by the conveying means 38 of the supply section 16 and held therebetween, the motor 112 is rotated by a command from a control circuit (not shown), and the stimulable phosphor sheet 12 is is roller pair 106 and 1
08 and is guided by a guide member 109 and conveyed to the platen 24, and the drive roller 40 and roller 4
2 and conveyed upward, and placed at a predetermined position on the cylindrical surface 24a.

An erasing section 104 is arranged between the reading section 18 and the storage section 22.

In the second aspect of the radiation image information reading device of the present invention, the radiation image information remaining on the stimulable phosphor sheet 12 after reading is erased in both the erasing section 104 and the storage section 22 described below. be.

The erasing unit 104 includes a pair of rollers 118 and an endless belt 1 stretched between the rollers.
20, a conveying means consisting of a motor 122 for rotating the roller 116, and an erasing mechanism 32' disposed above the conveying means.

Here, since the erasing mechanism 32' has substantially the same configuration as the erasing mechanism 32 described above, a description thereof will be omitted.

When the stimulable phosphor sheet 12 is placed on the endless belt 120 after being read from the platen 24, the motor 122 is rotated by a command from a control circuit (not shown), and the stimulable phosphor sheet 12 is placed on the endless belt 120. transported. At the same time, the stimulable phosphor sheet 12 is irradiated with erasing light by the erasing light source of the erasing mechanism 32', thereby erasing the remaining radiation image.

The stimulable phosphor sheet 12 that has passed through the erasing section 104 is transported by an endless belt 120 to the storage magazine 20.
Here, the erasing light source 28 of the erasing mechanism 32 irradiates the remaining radiation image with erasing light again, thereby erasing the remaining radiation image more completely.

In the second aspect of the present invention, the erasing unit 10
4 and the storage section 22, the erasing mechanism 32 of the erasing section 104 erases residual radiation image information.
' can be made smaller, and the erasing section 104 can also be made smaller than the conventional device. Furthermore, it is possible to lengthen the erasure time of the radiation image remaining on the stimulable phosphor sheet 12 after reading is completed, and it becomes possible to erase the residual radiation image more reliably.

As described above, regarding the radiation image information reading device according to the present invention,
Although the present invention has been described in detail based on the preferred embodiment shown in the accompanying drawings, the present invention is not limited thereto, and various improvements and changes may be made without changing the gist of the present invention. Of course.

<Effects of the Invention> In the radiation image information reading device of the first aspect of the present invention, an erasing light source is disposed in a storage section that stores the stimulable phosphor sheet after reading the radiation image information, and In this step, the stimulable phosphor sheet is irradiated with erasing light to erase the residual radiation image.

Therefore, there is no need to separately provide an erasing unit such as a radiographic image erasing area, which is provided in a conventional radiographic image information reading device, and the entire device can be made small and inexpensive. Further, the remaining radiation image can be sufficiently erased during the next reading of the radiation image of the stimulable phosphor sheet.

Further, in the radiation image information reading device according to the second aspect of the present invention, an erasing section is provided between the image information reading section and the storage section, and an erasing light source is also arranged in the storage section, and the erasing section and the storage section are provided with an erasing light source. Erasing light is irradiated onto the stimulable phosphor sheets in both storage sections to erase residual radiation images.

Therefore, the erasing section can be made smaller than in conventional devices, and the entire device can be made smaller and less expensive. Further, it is possible to irradiate the stimulable phosphor sheet with erasing light over a long period of time after reading has been completed, so that residual radiation images can be erased better and more reliably. It is also possible to reduce the amount of light from the erasing light source in each erasing mechanism.

[Brief explanation of drawings]

FIG. 1 is a plan view of a radiation image information reading device according to a first aspect of the present invention. FIG. 2 is a side view of the radiation image information reading device shown in FIG. 1, viewed in the direction of arrow H. - FIG. 3 is a side view of the radiation image information reading device shown in FIG. 1, viewed in the direction of arrow I11. FIG. 4 is a schematic diagram of the image information reading section of the radiation image information reading device shown in FIG. FIG. 5 is a schematic diagram of the reading device of the radiation image information reading device shown in FIG. FIG. 6 is a plan view of a radiation image information reading device according to a second aspect of the present invention. FIG. 7 is a side view of the radiographic image information reading device shown in FIG. 6, viewed in the direction of the arrow {circle around (2)}. FIG. 8 is a side view of the radiation image information reading device shown in FIG. 6, viewed in the direction of the arrow ■. Explanation of symbols 10.100...Radiation image information reading device, 12...
・Stormable phosphor sheet, 14... Supply magazine, 16... Supply section, 8... Image information reading section, 0... Storage magazine 2... Storage section, 4... Platen, 6 ...Reading mechanism, 8... Erasing light source, 2.32'... Erasing mechanism, 02... First sheet conveyance system, 04... Erasing section FIG, 1 Patent applicant Fuji Photo Film Co., Ltd. Agent Patent Attorney Nozomi Watanabe -F1G. G, 3 G. Q G, 4 1G, 6

Claims (2)

[Claims] (1) A supply unit that supplies a stimulable phosphor sheet on which radiographic image information has been accumulated and recorded; and a supply unit that irradiates the stimulable phosphor sheet with excitation light to emit the radiographic image information as stimulated luminescence light; It has an image information reading section that photoelectrically reads the stimulated luminescence light, a storage section that stores the stimulable phosphor sheet read by the image information reading section, and an erasing light source disposed in the storage section. In this storage section, the entire surface of the stimulable phosphor sheet after reading is irradiated with erasing light emitted from the erasing light source to erase the radiation image information remaining on the stimulable phosphor sheet. Characteristic radiation image information reading device. (2) a supply unit for supplying a stimulable phosphor sheet on which radiographic image information has been accumulated and recorded; an image information reading section that photoelectrically reads the stimulated luminescence light; a storage section that stores the stimulable phosphor sheet read by the image information reading section; and a storage section provided between the image information reading section and the storage section. an erasing section for erasing radiation image information remaining on the stimulable phosphor sheet, the storage section including an erasing section for erasing radiation image information remaining on the stimulable phosphor sheet; A radiation image information reading device characterized by being provided with a light source.