JP3707897B2 - Radiation image information reader - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a radiation image information reading apparatus, and more particularly to an improvement of an apparatus for reading radiation image information recorded on a stimulable phosphor sheet.
[0002]
[Prior art]
A part of this radiation energy is accumulated when irradiated with radiation, and then a stimulable phosphor (stimulable fluorescence) that exhibits stimulated emission according to the accumulated radiation energy when irradiated with excitation light such as visible light or laser light. Body), radiation image information of a subject such as a human body is once stored and recorded on a sheet-like stimulable phosphor sheet formed by laminating a stimulable phosphor on a support. Light is scanned pixel by pixel to generate stimulated emission light sequentially from each pixel, and the resulting stimulated emission light is sequentially read photoelectrically to obtain an image signal, while the stimulable phosphor after reading this image signal A radiation image recording / reproducing system that irradiates a sheet with erasing light and releases radiation energy remaining on the sheet is already well known and put into practical use.
[0003]
The image signal obtained by this system is subjected to image processing such as gradation processing and frequency processing suitable for observation interpretation, and the image signal after this processing is recorded on the film as a diagnostic visual image. Or displayed on a high-definition CRT for diagnosis by a doctor or the like. On the other hand, the stimulable phosphor sheet from which the residual radiation energy irradiated with the erasing light is emitted can again store and record radiation image information and can be used repeatedly.
[0004]
[Problems to be solved by the invention]
However, in the radiographic image information reading apparatus used in the radiographic image recording / reproducing system described above, a high-quality laser beam is used as the excitation light, and an expensive photomultiplier (photoelectron) is used to photoelectrically detect the stimulated emission light. And a laser beam scanning system and a condensing optical system for detecting the stimulated emission light emitted from the stimulable phosphor sheet as a signal for each pixel. It is quite expensive. This high price is one of the obstacles to widespread use of this system.
[0005]
The present invention has been made in view of the above circumstances, and an object of the present invention is to provide an inexpensive radiographic image information reading apparatus by reducing the manufacturing cost by using inexpensive parts.
[0006]
[Means for Solving the Problems]
The radiation image information reading apparatus of the present invention uses a light source of excitation light that excites the stimulable phosphor sheet as a line light source, and uses linear stimulated emission light emitted from a portion irradiated with the excitation light as the surface of the sheet. Alternatively, the excitation light mixed in the stimulated emission light is removed from the back surface through an excitation light separation filter, and the pixel division is detected by pixel division photoelectric reading means.
[0007]
That is, the radiation image information reading apparatus of the present invention is a line light source that linearly irradiates excitation light on a part of the stimulable phosphor sheet on which radiation image information is accumulated and recorded, and a portion of the sheet irradiated with the excitation light (Excited light irradiation side surface; front surface) and / or stimulated emission light corresponding to the radiation image information emitted from the back surface (surface opposite to excitation light irradiation; surface) of the irradiated portion, Pixel division in the length direction of the irradiated portion, pixel division photoelectric reading means for photoelectrically reading a plurality of pixels obtained by the pixel division in a two-dimensional array, the line light source, the pixel division photoelectric reading means, and the A scanning unit that moves the sheet in a direction substantially orthogonal to the length direction, and a portion of the sheet that emits the stimulated emission light and the pixel-divided photoelectric reading unit. Before It is characterized in that it has a pump light separating means for blocking passage of the excitation light to allow the passage of the emitted light.
[0008]
Here, the above-mentioned pixel division means to divide into a minute size corresponding to a substantially linear stimulated light emitting pixel, and does not mean to divide the pixel.
[0009]
The surface of the sheet on which the pixel-divided photoelectric reading means detects the stimulated emission light may be either the front surface or the back surface of the above-mentioned sheet, or may be detected substantially simultaneously from both surfaces. In order to eliminate as much as possible crosstalk light caused by stimulated emission light emitted from adjacent pixels, it is necessary to be as close as possible to the sheet without interfering with the light source. It is preferable to detect from the back surface (surface opposite to the surface on the side irradiated with excitation light) of the sheet that can be brought closer to the photoelectric reading means. The surface on the side where the stimulated emission light is read by the pixel-divided photoelectric reading means is preferably the surface on the side where the radiation is incident when a radiation image is taken on the sheet. This is because the transmitted radiation carrying the radiation transmission image information of the subject is scattered inside the sheet, so that the signal is blurred when read from the side where the radiation is emitted.
[0010]
To read photoelectrically in a two-dimensional array means to read two-dimensionally and photoelectrically. Therefore, the stimulated emission light emitted linearly is obtained by photoelectrically reading the two-dimensionally arranged pixels arranged in the length direction, that is, one-dimensionally.
[0011]
The pixel-divided photoelectric reading means includes a photoelectric conversion means in which a large number of photoelectric conversion elements are two-dimensionally arranged, and each incident end face is a portion of the sheet from which the photostimulated light is emitted (the surface of the sheet and (Or back surface) from a large number of optical fibers arranged so as to be aligned in the length direction of the linear irradiation portion and arbitrarily arranged so that the respective emission end faces face the different photoelectric conversion elements. A reference table in which a correspondence relationship between each optical fiber and each photoelectric conversion element at the incident end face is set in advance, and each electrical signal detected by each photoelectric conversion element is set in the reference table. Based on the corresponding relationship, a device constituted by reconfiguration means for reconfiguring the optical fiber on the incident end face according to the arrangement of the optical fibers is suitable. It can be. When such an embodiment is adopted and an excitation light separation filter disposed between the incident end of the optical fiber bundle and the stimulable phosphor sheet is applied as the excitation light separation means, the filter passes through the filter. Then, the photostimulated emission light is scattered before reaching the incident end face of each optical fiber, and there is a possibility that the light collection efficiency is lowered. Therefore, the incident end face of each optical fiber is between the excitation light separation filter and the sheet. It is desirable to further include a gradient index lens array in which a large number of gradient index lenses that individually collect the photostimulated light emitted from the facing sheet portions are incident on the respective optical fibers facing each other. .
[0012]
The gradient index lens means a lens having a refractive index distribution that varies in the radial direction. For example, a typical example is “Selfoc Lens” (registered trademark).
[0013]
【The invention's effect】
According to the radiation image information reading apparatus of the present invention, the light source of excitation light for exciting the stimulable phosphor sheet is a line light source, and the stimulated emission light emitted along the line light source is on the same side as the light source and / or Alternatively, by providing pixel-divided photoelectric reading means that detects pixels by dividing them from the surface opposite to the light source, the laser light is mainly detected while detecting the image information in the extending direction of the line light source corresponding to the pixels. A scanning optical system such as a rotary polygon mirror and an fθ lens necessary for scanning is unnecessary, and an inexpensive and compact radiation image information reading apparatus can be provided. Moreover, since the pixel division photoelectric reading means is used, an inexpensive linear light source can be used as the excitation light source. That is, in the past, pixel-by-pixel reading was performed by time-division reading in accordance with the scanning timing of the laser beam. However, in the present invention, it is not necessary to use an expensive device such as a laser light source, and the light source itself can be made inexpensive. You can also
[0014]
Furthermore, by providing excitation light separating means between the sheet and the pixel-divided photoelectric reading means, excitation light mixed with the stimulated emission light is not detected by the pixel-divided photoelectric reading means, and the excitation light is accurately detected. The emitted light can be detected.
[0015]
Here, the pixel-divided photoelectric reading means includes a photoelectric conversion means in which a large number of photoelectric conversion elements are two-dimensionally arranged, and each incident end face is linearly opposed to a portion where the photostimulated light is emitted. An optical fiber bundle composed of a number of optical fibers arranged so as to be aligned in the length direction of the irradiated portion and each emitting end face facing a different photoelectric conversion element, and each optical fiber and each photoelectric conversion element on the incident end face Based on the correspondence table set in advance in the reference table and each electrical signal detected by each photoelectric conversion element based on the correspondence relationship set in the reference table, it is reconfigured into an arrangement according to the arrangement of the optical fibers on the incident end face. And the reconfiguring means, the incident end face of each optical fiber, that is, the end face facing the sheet is a line along the extending direction of the line light source. But they are arranged in a row, whereas, not only there is no need to be arranged in the same order as the emission end face is always incident end face, not even need to be arranged in a row in a linear, may be arranged in any shape.
[0016]
Therefore, it is not necessary to use a high-cost line-shaped photoelectric conversion means due to difficulty in manufacturing.
[0017]
Therefore, it is appropriate to use a general-purpose product in which photoelectric conversion elements are arranged two-dimensionally as the photoelectric conversion means. Photoelectric conversion means such as a CCD (charge-coupled device) in which such photoelectric conversion elements are two-dimensionally arranged are generally inexpensive because they are generally easy to manufacture. As described above, the linear stimulated emission light emitted from the sheet can be easily guided to the two-dimensional surface of the photoelectric conversion means by using the optical fiber bundle.
[0018]
In this case, since the optical fiber bundle alone does not need to know in advance the positional relationship of the individual optical fibers in the entire fiber bundle at the entrance end face and the exit end face, the cost of manufacturing the fiber bundle is It can be made very cheap compared to the fiber bundle used.
[0019]
That is, in a set state in which the optical fiber bundle and the photoelectric conversion means are combined, the correspondence between the position of each fiber on the incident end face of the optical fiber bundle and each photoelectric conversion element constituting the photoelectric conversion means is obtained, and this is referred to as a reference table. By referring to this reference table after acquiring image data and rearranging this data digitally according to the arrangement order on the incident end face of the optical fiber, Data can be obtained according to the order.
[0020]
Here, the correspondence relationship between the position of each fiber on the incident end face of the optical fiber bundle and each photoelectric conversion element constituting the photoelectric conversion means is such that laser light or the like (about the diameter of the optical fiber) spot light is a plurality of What is necessary is just to scan along the incident end face of the optical fiber bundle which arranged the optical fiber in 1 row, and to obtain | require based on the time-sequential photoelectric detection result by each photoelectric conversion element which comprises the photoelectric conversion means at this time.
[0021]
An image recorded on the stimulable phosphor sheet is generally represented by image data of about 2000 pixels in the horizontal direction (main scanning direction) × 2000 pixels in the vertical direction (sub-scanning direction). Here, a line light source is arranged along the main scanning direction in the conventional radiographic image information reading apparatus, and 2000 optical fibers corresponding to 2000 pixels are arranged along this direction so that the incident ends thereof are in a line. In this case, the 2000 optical fibers are bundled so that the emission end face extends in a two-dimensional shape such as a substantially rectangular shape or a substantially circular shape, and this is configured to be photoelectrically detected by a 250,000 to 400,000 pixel CCD that is widely used. If this is done, the number of CCD pixels that one fiber (one pixel of the stimulable phosphor sheet) can handle is 125 to 200 pixels, and the number of pixels on the CCD side has room, so increase the number of optical fibers. Therefore, it is possible to cope with the improvement of the resolution of the obtained image.
[0022]
Furthermore, when such an optical fiber bundle is applied and a configuration in which an excitation light separation filter is applied as an excitation light separation means is adopted, a refractive index distribution in which a large number of refractive index distribution lenses are arranged between the excitation light separation filter and the sheet. By disposing the shaped lens array, it is possible to suppress the scattered emitted light from being scattered in the filter and to efficiently collect the stimulated emitted light on each optical fiber.
[0023]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, specific embodiments of the radiation image information reading apparatus of the present invention will be described with reference to the drawings.
[0024]
FIG. 1 is a block diagram showing an embodiment of a radiation image information reading apparatus according to the present invention, and FIG. 2 is a view showing an example of a radiation image information reading and recording apparatus using the radiation image information reading apparatus shown in FIG.
[0025]
The radiographic image information reading apparatus 20 shown in FIG. 1 has radiation recorded and recorded in IP10 extending in a direction substantially perpendicular to the conveying direction X of the stimulable phosphor sheet (hereinafter referred to as IP) 10 by the conveying belts 28a and 28b. Line light source 21 that irradiates IP10 with excitation light that generates stimulated emission light according to image information, and a large number of photoelectric conversion elements (approximately 400,000 pixels = 632 pixels × 632 pixels) are arranged in a two-dimensional manner. The CCD 25 and each incident end face 22a face the portion on the back side of the IP10 corresponding to the portion of the IP10 irradiated with the excitation light from the line light source 21, and are arranged in a line along the extending direction of the line light source 21. The output end faces 22b are bundled so as to spread in a two-dimensional plane, and are provided on the optical fiber bundle 22 composed of a large number of optical fibers 22i facing the light receiving face of the CCD 25, and on the incident end faces 22a of the optical fibers 22i. excitation Between the light separation filter 23 and the excitation light separation filter 23 and the stimulable phosphor IP10, the stimulated emission light emitted from the portion of the IP10 facing the incident end face 22a of each optical fiber 22i is sent to each optical fiber facing each other. Correspondence between a gradient index lens array 24 'in which a large number of gradient index lenses 24 condensed and incident on 22i are arranged in the extending direction of the line light source 21, and each optical fiber 22i and each photoelectric conversion element at the incident end face The reference table 26 in which the relationship is set in advance and each signal S detected by each photoelectric conversion element are reconfigured into an arrangement corresponding to the arrangement of the optical fibers 22i on the incident end face based on the correspondence set in the reference table 26. The reconfiguration means 27 is provided.
[0026]
Here, the line light source 21 has a configuration in which a fluorescent lamp 21a is provided inside a cylindrical reflecting mirror 21b having a slit 21c along a direction parallel to the central axis on a part of its peripheral surface. The light that has passed through becomes a linear light and irradiates IP10. In order to improve the degree of collection of light emitted from the slit 21c, a cylindrical lens having no power in the extending direction of the slit 21c may be provided along the slit 21c.
[0027]
The excitation light separation filter 23 is a filter set so as to cut the excitation light L emitted from the line light source 21 and transmit the stimulated emission light emitted by being excited by the excitation light L.
[0028]
The optical fiber bundle 22 is composed of, for example, 2000 optical fibers 22i. Each optical fiber 22i has a diameter of 0.1 mm and a core of 90%. As described above, the incident end face of the 2000 optical fibers 22i extends in the extending direction of the line light source 21. Although arranged so as to be arranged in a line in parallel (see FIG. 3 (1)), the emission end faces are randomly bundled as shown in (1) or (2).
[0029]
As a large number of gradient index lenses 24 constituting the gradient index lens array 24 ', for example, "Selfoc Lens" (registered trademark) is used.
[0030]
The CCD 25 is arranged very close to the output end face 22b of the fiber bundle 22, and is arranged so that the light from each optical fiber 22i is substantially evenly incident on the photoelectric conversion surface on which the 400,000-pixel photoelectric conversion elements are arranged. ing. Note that the CCD 25 has an aperture ratio of 50% and a QE of 60%, but these numerical values merely show a desirable example that can collect the photostimulated emission light with high efficiency. It is not restricted to the thing of these aspects.
[0031]
As shown in FIG. 1, in the present embodiment, the line light source 21 and the optical fiber 22 and the like are arranged on different surfaces with the IP 10 interposed therebetween. This is because it is necessary to make the incident end face of the optical fiber 22 very close to the sheet in order to efficiently enter the emitted light into the optical fiber and to prevent crosstalk of the stimulated emitted light from the adjacent pixel portion. Therefore, when the light collection efficiency does not deteriorate or when crosstalk can be effectively prevented, a configuration in which the optical fiber 22 and the like are arranged on the same side as the line light source 21 may be employed. Further, these may be arranged on each side of the IP 10 so that both sides are read.
[0032]
Further, the exit ends of the 2000 optical fibers 22i and the CCD 25 having 400,000 pixels correspond to each other as shown in FIG.
[0033]
A radiographic image information reading / recording apparatus 100 shown in FIG. 2 is a radiographic image information reading / recording apparatus that includes the radiographic image information reading apparatus 20 of the embodiment shown in FIG. An image reading unit 20 that reads an image signal corresponding to the radiation image information from the IP 10 on which the image is stored and recorded, and a signal such as gradation processing and frequency processing for the image signal S obtained by reading by the image reading unit 20 An image processing unit 50 that performs processing, an image output unit 60 that outputs a visible image P ′ represented by the image signal S ′ to the dry film 61 based on the image signal S ′ after the signal processing, IP 10 including a CRT monitor 70 for displaying a visual image P ′ on the display surface, and suction means 41 that sucks IP 10 accommodated in the cassette 11 mounted on the main body and draws it into the main body 90 from the cassette 11. Image reading unit 20, IP In this configuration, a transport means 40 for transporting to the tray 30 and a power source 80 are provided.
[0034]
Here, the power supply 80 and the image processing unit 50 are arranged at the bottom, the image reading unit 20 is arranged at the top, and the image output unit 60 is arranged at the top, so that the operator can stand up. When this apparatus is operated, the dry film 61 on which a visible image is recorded is ejected to a height position where the operator can easily see.
[0035]
The dry printer 60 performs thermal recording on a so-called cut sheet thermal material as a dry film 61. The dry printer 60 adsorbs a large number of dry films 61 housed in a removable magazine 62 one by one. It comprises a transport means 64 including a sheet means 63 to be carried in, and a thermal head device 65 for performing thermal recording on the transported film 61. The thermal head device 65 more specifically records a thermal surface image on a thermal material. A thermal head body (hereinafter, illustration of the configuration of the thermal head device is omitted), a heat sink as a cooling means fixed directly to the thermal head body, and a heat sink. Cooling fan that constitutes the means, sheet heater for heating the thermal head body, sheet shape with cooling fan And a control means for controlling driving of Ta.
[0036]
Next, the operation of the radiation image information reading / recording apparatus 100 of this embodiment will be described.
[0037]
When the IP tray 30 is mounted in the tray mounting port 92 of the main body, and the cassette 11 containing the IP10 in which the radiation image information of the patient is stored and recorded is mounted in the cassette mounting port 91, the lid portion of the cassette 11 is shown in FIG. The suction means 41 is opened as shown in 2), and the IP 10 accommodated in the cassette 11 with the lid portion opened is sucked and pulled out into the main body 90. The extracted IP 10 is carried into the image reading unit 20 by the conveying means 40.
[0038]
The image reading unit 20 carries IP10 on the two conveyor belts 28a and 28b and conveys it in the direction of arrow X. During this time, the surface of the IP 10 (the upper surface in the drawing) is irradiated with excitation light in a linear form from the line light source 21. The linear portion of the IP10 that has been irradiated with the excitation light emits stimulated emission light that emits light with a light amount corresponding to the radiation image information accumulated and recorded in the portion.
[0039]
This stimulated emission light occurs on the front side of the IP10, but also on the back side. Further, from the back surface of the sheet 10, not only the above-mentioned stimulated emission light but also a part of the excitation light that has irradiated the surface of the sheet 10 and transmitted through the sheet 10 is emitted. Then, the light emitted from the back surface of the sheet 10 is incident on the corresponding SELFOC lens 24 for each minute portion generated, and is focused and excited so as to be condensed on the incident end face 22a of each optical fiber 22i. The light enters the light separation filter 23.
[0040]
The excitation light separation filter 23 transmits only the stimulated emission light of the incident light, while the incident light is slightly diffused inside. However, since the light is focused by the SELFOC lens 24 in advance, it reaches the incident end face 22a of each optical fiber 22i without being greatly lost by diffusion. With the above operation, only the stimulated emission light from which the excitation light has been removed is efficiently condensed on the incident end face 22a of each optical fiber 22i and guided to the inside of each optical fiber 22i. As a result, the line-stimulated emission light emitted by irradiating the line-shaped excitation light from the line light source 21 is divided into minute optical signals corresponding to 2000 pixels, which is the number of the optical fibers 22i.
[0041]
The stimulated emission light for each pixel, which is guided to the emission end face 22b by repeating total reflection inside each optical fiber 22i, is emitted from each emission end face 22b, and the light of the CCD 25 provided close to the emission end face 22b. Light is guided onto the detection surface. The image formation state on the light detection surface (photoelectric conversion element surface) of the CCD 25 at this time is, for example, FIG. 4 when the way of bundling the emission end face of the optical fiber bundle 22 is as shown in FIG. It will be as shown in
[0042]
By the way, since the optical fiber bundle 22 is randomly bundled on the exit end face side, it is not known where the single fiber designated on the exit end face side is located on the entrance end face side. Therefore, it is necessary to associate the incident end face side and the exit end face side of the optical fiber bundle 22 in advance. Therefore, in the apparatus according to the present embodiment, if the optical fibers 22i are sequentially replaced and light is incident on the incident end face 22a of each fiber 22i, it is determined based on the detection signal of the CCD 25 which light has exited from which exit end face. The result of this correspondence is often tabulated as a reference table 26. Then, when the image is read later, the detection means for each photoelectric conversion element of the CCD 25 corresponds to the arrangement order of the fibers 22i at the incident end of the optical fiber bundle 22 while the reconstruction means 27 refers to this table 26. Rearrange.
[0043]
Thus, an image signal S ′ corresponding to the spatial position of the sheet 10 can be obtained, and the obtained image signal S ′ is input to the image processing unit 50.
[0044]
The image processing unit 50 performs various signal processes on the input image signal S ′. The image signal S ″ after the signal processing is output to the image output unit 60 and the CRT monitor 70.
[0045]
On the other hand, the IP 10 after the image signal is read by the image reading unit 20 is transported by the transport means 40 and stored in the IP tray 30. A configuration in which an erasing unit for irradiating erasing light is provided in the conveyance path between the image reading unit 20 and the IP tray 30 so that the radiation energy remaining in the IP 10 after reading the image signal is almost completely emitted. It can also be taken.
[0046]
Since the IP tray 30 can store a plurality of IP10s, the IP tray 30 remains attached to the apparatus 100 until a predetermined number of IP10 after image reading is completed. After being removed and the stored IP 10 is discharged, it is attached to the apparatus 100 again.
[0047]
The CRT monitor 70 displays on the display surface a visible image corresponding to the image signal S ″ after the signal processing input from the image processing unit 50, and the operator observes this display to determine the degree of signal processing. Judging the necessity of correction and range specification change.
[0048]
Further, in the image output unit 60, the sheet means 63 sucks a large number of dry films 61 accommodated in the magazine 62 one by one and carries them into the printer 60, and the conveying means 64 thermally transfers the dry films 61. The thermal head device 65 heats the visible image corresponding to the image signal S ″ on the transported dry film 61 based on the image signal S ″ input from the image processing unit 50. Record. More specifically, in this thermal recording, the control means controls the driving of the cooling fan and the planar heater to adjust the temperature of the thermal head body, thereby recording a gradation image.
[0049]
The dry film 61 in which a visible image is recorded is output from the film discharge port 93 to the outside of the apparatus 100. The film discharge port 93 is positioned so that when the operator stands up and operates the apparatus, the dry film 61 on which a visible image is recorded is easy to be noticed by the operator. It is also possible to prevent forgetting to remove the used film.
[0050]
As described above, according to the radiation image information reading and recording apparatus 100 of the present embodiment, the image signal is separated into signals for each pixel without using expensive components such as a conventional laser light source, laser scanning system, and photomultiplier. Therefore, the manufacturing cost can be greatly reduced compared to the conventional apparatus, thereby reducing the price of the apparatus and spreading the apparatus.
[Brief description of the drawings]
FIG. 1 is a block diagram showing an embodiment of a radiographic image information reading apparatus according to the present invention. FIG. 2 is a radiographic image information reading apparatus including a part of the radiographic image information reading apparatus shown in FIG. FIG. 3 is a schematic diagram showing the arrangement of the optical fiber bundle at the entrance end face and the exit end face. FIG. 4 is a diagram showing the relationship between the exit end face of the optical fiber bundle and the photoelectric conversion element of the CCD 25.
10 Storage phosphor sheet
20 Image reader
21 line light source
22 Optical fiber bundle
22a Incident end face
22b Output end face
22i optical fiber
23 Excitation light separation filter (Excitation light cut filter)
24 Selfoc lens
24 ′ Selfoc lens array
25 CCD
26 Reference table
27 Reconfiguration means
28a, 28b Conveyor belt
100 Radiation image information reading and recording device
200 Image transmission equipment

Claims (1)

A line light source for linearly irradiating excitation light on a part of a stimulable phosphor sheet on which radiation image information is accumulated and recorded, a portion of the sheet irradiated with the excitation light and / or a back surface of the irradiated portion The stimulated emission light corresponding to the radiation image information emitted from the portion is divided into pixels in the length direction of the irradiated portion, and a plurality of pixels obtained by the pixel division are photoelectrically expressed in a two-dimensional array. Pixel division photoelectric reading means for reading, scanning means for moving the line light source and the pixel division photoelectric reading means and the sheet in a direction substantially perpendicular to the length direction, and the stimulating light emission of the sheet light is disposed between the portion and the pixel division photoelectric reading means for emitting said to block the passage of the excitation light release that have a pumping light separating means for allowing the passage of the emitted light ray images information reading device Oite,
The pixel-divided photoelectric reading means is
Photoelectric conversion means in which a large number of photoelectric conversion elements are arranged two-dimensionally;
Each incident end face is arranged so as to be aligned in the length direction of the linear irradiation portion so as to face the portion where the photostimulated emission light of the sheet is emitted, and each emission end face is arranged on the photoelectric conversion element different from each other. An optical fiber bundle composed of a large number of optical fibers arranged to face each other;
A reference table in which the correspondence between each optical fiber and each photoelectric conversion element on the incident end face is set in advance,
Reconstructing means for reconfiguring each electric signal detected by each photoelectric conversion element into an arrangement corresponding to the arrangement of the optical fibers on the incident end face based on the correspondence set in the reference table. Yes,
The excitation light separation means is an excitation light separation filter disposed between the incident end of the optical fiber bundle and the sheet;
Refractive index between the excitation light separating filter and the sheet, allowing the stimulated emission light emitted from the portion of the sheet facing the incident end face of each optical fiber to be collected and incident on each facing optical fiber. A radiation image information reading apparatus , further comprising a gradient index lens array in which a number of distributed lenses are arranged .

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