JP3999392B2 - Storage device and storage method for stimulable phosphor sheet - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a transport apparatus and a transport method for transporting a stimulable phosphor sheet while changing its transport direction, which is advantageously used in the implementation of a radiation image recording / reproducing method using a stimulable phosphor. It is.
[0002]
[Prior art]
A radiation image recording / reproducing method using a stimulable phosphor is known as an alternative to the conventional radiographic method. This method uses a stimulable phosphor sheet containing a stimulable phosphor (also referred to as a radiation image conversion panel). The phosphor sheet transmits radiation transmitted through a subject or emitted from a subject. The photostimulable phosphor is absorbed, and then the photostimulable phosphor is accumulated in the photostimulable phosphor by exciting the photostimulable phosphor in time series with electromagnetic waves (excitation light) such as visible light and infrared rays. The emitted radiation energy is emitted as fluorescence (stimulated luminescence light), this fluorescence is photoelectrically read to obtain an electrical signal, and a radiographic image of the subject or subject is reproduced as a visible image based on the obtained electrical signal To do. The phosphor sheet that has been read is prepared for the next photographing after the remaining image is erased. That is, the stimulable phosphor sheet is repeatedly used.
[0003]
The stimulable phosphor sheet used in the radiation image recording / reproducing method comprises a support and a photostimulable phosphor layer provided on the surface as a basic structure. However, when the photostimulable phosphor layer is self-supporting, a support is not necessarily required. In addition, a transparent protective film is usually provided on the surface of the photostimulable phosphor layer (the surface not facing the support) so that the phosphor layer can be protected from chemical alteration or physical impact. Protect.
[0004]
The photostimulable phosphor layer is usually composed of a photostimulable phosphor and a binder containing and supporting the phosphor in a dispersed state. However, as the photostimulable phosphor layer, a layer composed only of aggregates of stimulable phosphors without including a binder formed by vapor deposition or sintering is also known. Further, an accumulative phosphor sheet having a stimulable phosphor layer in which a polymer substance is impregnated in a gap between aggregates of stimulable phosphors is also known. In any of these phosphor layers, the photostimulable phosphor has the property of exhibiting photostimulated luminescence when irradiated with excitation light after absorbing radiation such as X-rays. The radiation emitted from the specimen is absorbed by the stimulable phosphor layer of the stimulable phosphor sheet in proportion to the radiation dose, and the radiation image of the subject or the subject is stored on the phosphor sheet. Formed as. This accumulated image can be emitted as stimulated emission light by irradiating with the excitation light, and by reading this stimulated emission light photoelectrically and converting it into an electrical signal, the accumulated image of radiation energy is imaged. Can be realized.
[0005]
When carrying out the radiation image recording / reproducing method, the stimulable phosphor sheet is inserted into the radiation image recording / reproducing apparatus and shielded against light from the outside. It is repeatedly used for recording and reproduction of radiation images by a cycle of irradiation of excitation light (reading of recorded radiographic images) and irradiation of erasing light (erasing of remaining radiographic images).
[0006]
In the early radiation image recording / reproducing apparatus, the radiation image recording apparatus, the radiation image reading apparatus, and the residual radiation image erasing apparatus were designed as independent apparatuses. Therefore, movement of the stimulable phosphor sheet between the apparatuses is mainly performed by a human hand, and most of the movement of the stimulable phosphor sheet in each apparatus is performed in the horizontal direction using a conveyance belt or the like. It was limited to moving. However, after that, the radiation image recording in which each device is integrated together by various improvements considering the reduction of the space required for installation of the device and the demand for automation of delivery of the stimulable phosphor sheet between the devices. A playback device was developed. In recent years, the demand for such space saving has further increased, and it is therefore necessary to further reduce the size of the integrated radiation image recording / reproducing apparatus.
[0007]
In order to further reduce the size of the integrated radiation image recording / reproducing device, it is necessary to reduce the size of each unit device such as a radiation image recording device, a radiation image reading device, and a residual radiation image erasing device. At the same time, it is necessary to save space in the transport system of the stimulable phosphor sheet disposed between the unit devices. In an integrated radiation image recording / reproducing apparatus designed in recent years, in order to arrange each unit device not only in the horizontal direction but also in the vertical direction, the transport system has the stimulable phosphor sheet in the vertical direction. In addition to transporting, from vertical to horizontal, and further from vertical to reverse vertical (ie, upside down), from horizontal to reverse horizontal (ie, front to back), etc. There has been a demand for a complicated conveyance form including a change in the conveyance direction. In recent radiological image recording / reproducing apparatuses, it is necessary to change the transport direction as described above at a steep angle in response to the demand for miniaturization.
[0008]
As for the improvement of the storage phosphor sheet in the vertical direction of the storage phosphor sheet and the improvement of the storage phosphor sheet that can be advantageously used in the vertical transfer system, various inventions have been disclosed in JP-A-60-40599, JP-A-60-40600, JP-A-60-212398, JP-A-60-211399, JP-A-60-213897, JP-A-60-213898, JP-A-60- No. 213899 and JP-A-60-213900. The vertical conveyance of the stimulable phosphor sheet described in these publications is performed by bringing the phosphor layer surface of the stimulable phosphor sheet into contact with the driving roller.
[0009]
However, in the radiation image recording / reproducing apparatus, there is no known method for continuously and safely transporting the stimulable phosphor sheet while changing the transport direction at a steep angle. That is, when the stimulable phosphor sheet is transported with a sudden change in the transport direction (turns such as 90 ° turn and 180 ° turn), the stimulable phosphor layer of the stimulable phosphor sheet is damaged such as cracks. There is a problem that the surface of the photostimulable phosphor sheet is easily generated, and damage such as scratches and cuts is easily generated. When such damage occurs in the stimulable phosphor layer, light scattering occurs at the damaged portion, resulting in a deterioration in the image quality of the reproduced radiographic image. Therefore, unless a conveyance system capable of turning the stimulable phosphor sheet at a steep angle while avoiding such damage as much as possible is developed, it is difficult to sufficiently miniaturize the radiation image recording / reproducing apparatus.
[0010]
[Problems to be solved by the invention]
The present invention relates to a stimulable phosphor sheet that is necessary for enabling a sufficient miniaturization of a radiation image recording / reproducing apparatus for carrying out a radiation image recording / reproducing method using a stimulable phosphor sheet as a radiation image recording material. Provides a transport device and a transport method for realizing a sudden change in the transport direction (turns such as 90 ° turn and 180 ° turn) while avoiding various damages that are likely to occur in the stimulable phosphor sheet. The purpose is to do.
[0011]
[Means for Solving the Problems]
The present invention provides a storage phosphor sheet that has only the same curved surface on the inside and that is in contact with the vicinity of both side edges of the storage phosphor sheet to guide the sheet forward in the plane of the sheet. A pair of stimulable phosphor sheet side edge guides arranged so that the respective side faces face each other with a slightly narrower width than the lateral width, and accumulation along each curved surface inside each of the side edge guides A plurality of rollers arranged at sufficient intervals for the fluorescent phosphor sheet to pass through, rotating rollers that contact the vicinity of both side edges of the stimulable phosphor sheet and guide the conveyance forward in the sheet plane direction , And at least the position of the stimulable phosphor sheet side edge guide close to the stimulable phosphor sheet introduction side edge, and the extended position of the guide and the extended position of the curve formed by the plurality of rotating rollers, respectively. The stimulable phosphor sheet, characterized in that in contact only in the vicinity of the side edges of the stimulable phosphor sheet comprising a pair of stimulable phosphor sheet drive roller for guiding the conveyance of the sheet plane forward In the storage device of the stimulable phosphor sheet for transporting while changing the transport direction.
[0012]
The present invention also advances the stimulable phosphor sheet by a driving roller that contacts only the vicinity of both side edges of the stimulable phosphor sheet and conveys it forward in the sheet plane direction . Guides forward conveyance in the sheet plane direction by contacting only the vicinity of both side edges, and has the same curved surface inside, with a slightly narrower interval than the lateral width of the stimulable phosphor sheet to be conveyed, respectively. A pair of stimulable phosphor sheet side edge guides arranged so that the side faces of each other face each other, and inside each of the side edge guides, the stimulable phosphor sheet passes along each curved surface are plurality placed over a sufficient distance, the stimulable phosphor in contact only in the vicinity of the side edges of the sheet consists of a rotating roller for guiding the conveyance of the sheet plane direction forward stimulable phosphor sheet guide There is also a method of conveying while changing the conveying direction of the stimulable phosphor sheet, characterized in that for moving within the interval location.
[0013]
The stimulable phosphor sheet transported by the transport device and transport method of the present invention comprises a sheet-like support, a stimulable phosphor layer provided on the surface of one side of the support, and a protective film, The stimulable phosphor layer in which the stimulable phosphor layer and the protective film do not exist in the vicinity of both side edges of the support, and instead, a reinforcing member whose top is higher than the upper surface of the protective film is attached. Sheets are advantageous .
[0014]
DETAILED DESCRIPTION OF THE INVENTION
The present invention will be described in more detail with reference to the accompanying drawings.
FIG. 1 is a side view showing the overall configuration of a radiation image recording / reproducing apparatus incorporating a storage phosphor sheet conveying apparatus (hereinafter also referred to as a phosphor sheet turn conveying apparatus) according to the present invention.
[0015]
The outside of the integrated radiation image recording / reproducing apparatus is constituted by a housing 2 provided with a top plate 1 for X-ray imaging on the front surface. Inside the top plate 1 for X-ray imaging, a stimulable phosphor sheet (hereinafter also simply referred to as a phosphor sheet) 3 and the phosphor sheet 3 are kept in contact with the top plate 1 during X-ray imaging. A presser plate 4 is provided. After the X-ray imaging is completed, the presser plate 4 is slightly tilted while rotating around the lower end portion thereof, and the upper end portion is separated from the X-ray imaging top plate 1. That is, the upper part of the phosphor sheet 3 is opened immediately after the X-ray imaging is completed. The phosphor sheet 3 is pushed up by a push-up tool provided at the lower part of the presser plate 4 and introduced into the phosphor sheet turn conveying device.
[0016]
FIG. 2 is a perspective view showing in detail the configuration of the phosphor sheet turn conveying device. That is, the phosphor sheet turn conveying device has a pair of fluorescent materials that have the same curved surface on the inside and are arranged so that the side surfaces face each other with an interval slightly narrower than the lateral width of the phosphor sheet 3 to be conveyed. A plurality of body sheet side edge guides 5 (5a, 5b) and side edge guides 5 are arranged inside each of the side edge guides 5 along the respective curved surfaces with a sufficient interval for the phosphor sheet 3 to pass therethrough. The rotating roller 6 and at least a position close to the phosphor sheet introduction side edge of the phosphor sheet side edge guide 5, and an extended position of the guide and an extended position of a curve formed by the plurality of rotating rollers 6, respectively. It is introduced into the conveying device including the pair of phosphor sheet driving rollers 7 by the rotation of the driving roller 7. The pair of phosphor sheet drive rollers 7 are arranged in a connected state via the shaft core 8 along each of the phosphor sheet side edge guides 5 a and 5 b, and is applied from the drive motor 9 via the timing belt 10. The phosphor sheet 3 is moved forward by the applied rotational force. The phosphor sheet 3 is transported in the opposite direction after the radiation image reading operation and the residual radiation energy erasing operation are completed and returned to the position on the back side of the original X-ray imaging top plate 1. It is preferable that the sheet driving roller 7 can be arbitrarily switched in the rotation direction. A plurality of rotating rollers 6 are provided independently along the inner sides of the phosphor sheet side edge guides 5a and 5b, respectively, and are usually free rollers. That is, the rotating roller 6 serves to assist the smooth movement of the phosphor sheet 3 along the curved surface of the inner wall of the phosphor sheet side edge guide without giving a driving force to the phosphor sheet 3.
[0017]
FIG. 3 is a diagram showing a state in which the phosphor sheet 3 is introduced into the phosphor sheet turn conveying device and is conveyed while changing the conveying direction.
[0018]
Normally, a pair of phosphor sheet driving rollers 11 similar to the phosphor sheet driving roller 7 on the inlet side is also provided on the phosphor sheet side on the outlet side (discharge side for sending out the phosphor sheet) of the phosphor sheet turn conveying device. Along the respective edge guides 5a and 5b, they are arranged in a connected state via an axis. Then, the phosphor sheet 3 introduced into the phosphor sheet turn conveying device by the driving force of the driving roller 7 is now sandwiched between the driving rollers 11 and further advanced. The phosphor sheet turn conveying device shown in the figure is designed to change the conveying direction of the phosphor sheet 3 by 180 degrees. Therefore, as shown in FIG. 4, the phosphor sheet 3 that has passed through the conveying device is conveyed downward while being held by the driving roller 11.
[0019]
When the front end portion of the phosphor sheet 3 is lowered and conveyed while being held by the drive roller 11, the phosphor sheet 3 is disposed below the drive roller 11 so as to be surely inserted into the next radiation image reading device. A pair of side edge guides 12 can be provided at positions along the traveling direction.
[0020]
The configuration of the radiation image reading apparatus is shown in many publications and is already known. The radiation image reading apparatus shown in FIG. 1 includes a semiconductor laser light source 13, a polygon 14, a laser beam direction changing mirror 15, a condensing mirror 16, and a photomultiplier tube 17.
[0021]
The phosphor sheet 3 descending along the side edge guide 12 continues to descend while being reliably supported by the drive rollers 18 and 19 disposed before and after the radiation image reading device, and the fluorescence image is read by the radiation image reading device. The radiation image recorded on the body sheet 3 is read and continues to descend further.
[0022]
A side edge guide 20 similar to that described above is optionally provided below the drive roller 19 to reliably guide the moving direction of the descending phosphor sheet 3. And this time, the conveyance device for changing the conveyance of the phosphor sheet 3 in the downward direction to the conveyance in the upward direction by 180 degrees (with the same configuration as described above, arranged upside down) Next, the moving direction of the phosphor sheet 3 is changed to the ascending direction by the conveying device 21 and is introduced into the erasing device 22 (see FIG. 5).
[0023]
The configuration of the erasing device 22 is already known. That is, the erasing device is composed of an erasing lamp and a light-shielding cover that covers the erasing lamp. It is a device that releases energy. A phosphor sheet guide holding plate 23 is preferably provided at a position opposite to the erasing lamp of the erasing device 22.
[0024]
In the erasing device 22, the phosphor sheet 3 that has released the residual radiation energy is then transported in the direction opposite to the transport direction so far for the next use (see FIG. 5). Of course, in the transfer process in this case, the operation of reading out the radiation image is not performed. The phosphor sheet 3 is returned to the imaging position shown in FIG. 1 and used for the next X-ray imaging operation.
[0025]
The method for transporting the stimulable phosphor sheet of the present invention can be advantageously implemented using the transport device described above.
[0026]
As the stimulable phosphor sheet to be conveyed while changing the direction by the conveying method of the present invention, a known phosphor sheet can be used. As described above, a typical structure of a known stimulable phosphor sheet is basically composed of a support and a photostimulable phosphor layer provided on the surface thereof. A transparent protective film is provided on the surface of the phosphor layer.
[0027]
The support is a layer mainly composed of a transparent or opaque plastic sheet, and optionally provided with various functional layers (stimulated emission light reflection layer, excitation light absorption layer, adhesive layer, etc.).
[0028]
The photostimulable phosphor layer is usually formed from photostimulable phosphor particles and a binder that supports and disperses them. A stimulable phosphor is a phosphor that exhibits stimulating light emission when irradiated with excitation light after irradiation with radiation as described above. However, from a practical aspect, a stimulable phosphor has a wavelength in the range of 400 to 900 nm. It is desirable for the phosphor to exhibit stimulated emission in the wavelength range of 300 to 500 nm by light. Examples of stimulable phosphors used in the method of the present invention include those described in detail in JP-A-2-193100 and JP-A-4-310900. Among known stimulable phosphors, europium or cerium activated alkaline earth metal halide phosphors and cerium activated rare earth oxyhalide phosphors are particularly preferred because they exhibit particularly high-stimulated stimulating luminescence. . However, the photostimulable phosphor used in the present invention is not limited to the above-mentioned phosphors, but can accumulate the irradiated radiation, and when the excitation light is irradiated at any time thereafter, the photostimulable light emission is performed. Any phosphor may be used as long as it exhibits the following.
[0029]
As a transparent protective film generally provided on the surface of the photostimulable phosphor layer, a transparent organic polymer substance such as cellulose derivative, polymethyl methacrylate, organic solvent-soluble fluororesin, etc. is dissolved in an appropriate solvent. The phosphor layer is formed by coating the prepared solution on the phosphor layer, or separately forming a protective film forming sheet such as an organic polymer film such as polyethylene terephthalate or a transparent glass plate. A material provided on the surface of the phosphor layer using an appropriate adhesive or a material obtained by depositing an inorganic compound on the phosphor layer by vapor deposition or the like is used. Various additives such as light scattering fine particles such as magnesium oxide, zinc oxide and titanium oxide, slipping agents such as perfluoroolefin resin powder and silicone resin powder, and crosslinking agents such as polyisocyanate are dispersed in the protective film. It may be contained.
[0030]
In the transport method that involves changing the direction of the stimulable phosphor sheet of the present invention, a method is used in which the surfaces of both side edges of the stimulable phosphor sheet are transported while being in contact with the drive rotation roller. Because the contact of the drive member to the surface of the photostimulable phosphor layer is due to the contact of only the edge as in the transport method of the present invention, it is easy to give a physical impact to the phosphor layer. It is desirable to avoid it as much as possible. Therefore, it is desirable that the stimulable phosphor sheet used in the conveying method with the direction change of the present invention has a structure in which the stimulable phosphor layer does not extend to both side edges.
[0031]
An example of the structure of the stimulable phosphor sheet that is preferable for use in the conveying method of the present invention is shown in FIG. In FIG. 6, the stimulable phosphor sheet 3 has a configuration in which a stimulable phosphor layer 62 and a protective layer 63 are laminated on a support 61 in this order. However, both the stimulable phosphor layer 62 and the protective layer 63 are removed in the region of both side edge portions (based on the transport direction) of the phosphor sheet, and the region portion has both side edges instead. The portion reinforcing members (transport direction reinforcing members) 64 a and 64 b are provided in such a configuration that the tops thereof are higher than the height of the surface of the protective film 63. The material of the side edge reinforcing members is preferably a flexible material so that the stimulable phosphor sheet conveyed in a turn can be bent with a smooth curve. Examples of such materials include polyolefins such as high density polyethylene, polymers such as polyesters such as polyethylene terephthalate and polyethylene naphthenate, and polyamides. The side edge reinforcing members can be fixed on the support using an adhesive. The installation of the side edge reinforcing members and the configuration of the reinforcing members are advantageous for the conveying method using the both edge driving method of the stimulable phosphor sheet of the present invention, but such a configuration is necessarily required. It is not something to do.
[0032]
On the lower side (the side where the photostimulable phosphor layer is not provided) of the front end portion and the rear end portion (the front end portion and the rear end portion with respect to the transport direction) of the stimulable phosphor sheet 3. Further, width direction reinforcing members 65a and 65b provided along the end portions are attached. That is, in the transport method that involves changing the direction of the stimulable phosphor sheet of the present invention, a method is used in which only the surfaces of both side edges of the stimulable phosphor sheet are brought into contact with the drive rotation roller. Accordingly, there is a problem that when the direction is changed, there is a tendency that the vicinity of the center of the side in the width direction ahead of the storage direction of the stimulable phosphor sheet swells to the side along the direction before the change. Since such a deformation may cause the stimulable phosphor sheet to come into contact with the conveying device at the swollen portion, it is desirable to suppress the occurrence of such a deformation as much as possible. For this reason, it is desirable to install a reinforcing member extending in the width direction at the front end portion and / or the rear end portion of the stimulable phosphor sheet to reduce deformation.
[0033]
The reinforcing member in the width direction with the stimulable phosphor sheet can be formed from a normal plastic material, but is preferably formed from a material having rigidity. As the width direction reinforcing member, a long plate-like member that is long in one direction is usually used, but the bending elastic modulus in the width direction is preferably larger than the bending elastic modulus in the vertical direction. Is preferably in the range of 5000 to 50000 kg / mm ² . Examples of such highly rigid materials include fiber reinforced plastic sheets (FRP), particularly glass fiber reinforced plastic sheets (GFRP), or carbon fiber composite sheets. These sheets can also be used by laminating a plurality of sheets by a method of sequentially changing the direction in which the bending elastic modulus is high. Or the laminated body of metal sheets, such as an aluminum sheet, and a plastic sheet may be sufficient.
[0034]
【The invention's effect】
According to the transport apparatus and the transport method of the present invention, the storage of the stimulable phosphor sheet is performed in the radiation image recording / reproducing apparatus with the direction change such as 90 degree turn or 180 degree turn of the stimulable phosphor sheet. The present invention can be carried out with almost no deterioration in characteristics. Therefore, it greatly contributes to miniaturization of the radiation image recording / reproducing apparatus.
[Brief description of the drawings]
FIG. 1 is a side view showing an overall configuration of a radiation image recording / reproducing apparatus incorporating a storage phosphor sheet conveying device (phosphor sheet turn conveying device) according to the present invention, at the time of X-ray imaging; The position of the stimulable phosphor sheet is shown.
FIG. 2 is a perspective view showing in detail an internal configuration of a storage phosphor sheet transport device (phosphor sheet turn transport device) according to the present invention.
3 is a side view showing a state in which the stimulable phosphor sheet after X-ray imaging is introduced into the phosphor sheet turn conveying device in the radiation image recording / reproducing apparatus of FIG. 1. FIG.
4 is a side view showing a state in which the stimulable phosphor sheet after X-ray imaging is fed from the phosphor sheet turn conveying device and introduced into the radiation image reading device in the radiation image recording / reproducing apparatus of FIG. is there.
FIG. 5 is a schematic diagram of the radiation image recording / reproducing apparatus shown in FIG. 1, in which a stimulable phosphor sheet from which a radiation image has been read is sent out from a lower phosphor sheet turn conveying device and introduced into a residual radiation energy erasing device. It is a side view which shows a state.
FIG. 6 is a perspective view showing an example of the configuration of a stimulable phosphor sheet that can be advantageously used in a transport method using the transport device (phosphor sheet turn transport device) of the stimulable phosphor sheet of the present invention. .
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 X-ray imaging top plate 2 Radiation image recording / reproducing apparatus housing | casing 3 Storage phosphor sheet | seat 4 Holding plate 5 Side edge guide 5a Side edge guide 5b Side edge guide 6 Rotating roller (free roller)
7 Phosphor sheet drive roller 8 Phosphor sheet drive roller axis 9 Drive motor 10 Timing belt 11 Phosphor sheet drive roller 12 Side edge guide 13 Semiconductor laser light source 14 Polygon 15 Laser beam direction changing mirror 16 Condensing mirror 17 Photomultiplier tube 17
18 Phosphor sheet drive roller 19 Phosphor sheet drive roller 20 Side edge guide 21 Phosphor sheet turn conveying device 22 Erasing device 23 Phosphor sheet guide holding plate 61 Support 62 Storage phosphor layer 63 Protective layer 64a Both side edges Reinforcing member 64b Both-side edge reinforcing member 65a Width direction reinforcing member 65b Width direction reinforcing member

Claims (8)

  Guides forward conveyance in the sheet plane direction by contacting only the vicinity of both side edges of the stimulable phosphor sheet, and has the same curved surface inside, slightly smaller than the lateral width of the stimulable phosphor sheet to be conveyed A pair of stimulable phosphor sheet side edge guides arranged so that the respective side surfaces face each other with a narrow interval, and inside each of the side edge guides, along each curved surface, the stimulable phosphor sheet A plurality of rollers arranged at sufficient intervals to pass through, rotating rollers that contact only the vicinity of both side edges of the stimulable phosphor sheet and guide the sheet forward in the plane of the sheet, and at least the stimulator The phosphor sheet side edge guide is disposed at a position close to the storage phosphor sheet introduction side edge, and at the extension position of the guide and the extension position of the curve formed by the plurality of rotating rollers, respectively. A conveying direction of the stimulable phosphor sheet comprising a pair of stimulable phosphor sheet driving rollers that contact only the vicinity of both side edges of the phosphor sheet and guide the sheet forward in the sheet plane direction. A storage device for a stimulable phosphor sheet to be transferred while being changed.   A pair of stimulable phosphor sheets at a position near the end of the stimulable phosphor sheet feed-out portion of the stimulable phosphor sheet side edge guide, and also at the extended position of the guide and the extended position of the curve formed by the plurality of rotating rollers. 2. The storage phosphor sheet conveying apparatus according to claim 1, further comprising a body sheet driving roller.   3. The storage device for a stimulable phosphor sheet according to claim 1, wherein any of the stimulable phosphor sheet driving rollers is capable of arbitrarily changing the rotation direction thereof.   The stimulable phosphor sheet is advanced by a driving roller that contacts only the vicinity of both side edges of the stimulable phosphor sheet and transports forward in the sheet plane direction, and then the vicinity of both edges of the stimulable phosphor sheet. Guides the sheet forward in the plane of the sheet, and has the same curved surface on the inside so that the sides face each other with an interval slightly narrower than the lateral width of the stimulable phosphor sheet to be conveyed A pair of stimulable phosphor sheet side edge guides disposed on the inner edge of each of the side edge guides, and a space sufficient for the stimulable phosphor sheet to pass along each curved surface inside each of the side edge guides. Within the interval of the stimulable phosphor sheet guide device, which is arranged in plural, and includes a rotating roller that contacts only the vicinity of both side edges of the stimulable phosphor sheet and guides the conveyance forward in the sheet plane direction. How to convey while changing the conveying direction of the stimulable phosphor sheet for causing moved.   The storage phosphor sheet to be transported is composed of a sheet-like support, a storage phosphor layer provided on the surface of one side of the support, and a protective film, in the vicinity of both side edges of the support. 5. The method for conveying a stimulable phosphor sheet according to claim 4, wherein the stimulable phosphor sheet is free of a stimulable phosphor layer and a protective film.   6. The stimulable phosphor sheet in which a reinforcing member is disposed in a portion where the stimulable phosphor layer and the protective film in the vicinity of both side edges of the stimulable phosphor sheet are not present. 2. A method for conveying the stimulable phosphor sheet according to 1.   The method for conveying a stimulable phosphor sheet according to claim 6, wherein the reinforcing member is a reinforcing member whose top is positioned higher than the upper surface of the protective film.   The stimulable phosphor sheet to be transported is a stimulable phosphor sheet having reinforcing members arranged along the respective end portions in the vicinity of the front end portion and / or the rear end portion in the transport direction. A method for conveying a stimulable phosphor sheet according to any one of claims 4 to 7.

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