JPH0275536A - Storage-type fluorescent material sheet and its takeoff method - Google Patents

Abstract

PURPOSE:To engage securely a seat extruding claw with a storage-type fluores cent material seat and perform the takeoff of the seat surely by providing a projecting part in the storage-type fluorescent material seat and enlarging the height of the seat extruding claw by the height of the projecting part than the thickness of the seat. CONSTITUTION:If a projecting part 2 is provided in a storage-type fluorescent material seat, the height of a seat extruding claw 4 can be near the height which summed up the thickness of the storage-type fluorescent material seat 1 and the height of the projecting part 2, and the seat extruding claw 4 is well engaged with the storage-type fluorescent material seat 1 so as to surely perform the takeoff of the seat. Since respective storage-type fluorescent mate rial seat contacts to each other with only the projecting part formed outside of the picture image forming area and the rear surface of the seat, the noncon formity like that the picture image forming area is damaged with the scratch when the seat is taken off is eliminated.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of the Invention) The present invention relates to a stimulable phosphor sheet that is taken out one by one from a magazine and a method for taking out the stimulable phosphor sheet. The present invention relates to a phosphor sheet and a method for taking out the same.

(Conventional technology) Certain phosphors are exposed to radiation (X-rays, α-rays, β-rays.

When irradiated with γ-rays, electron beams, ultraviolet rays, etc., a portion of this radiation energy is accumulated in the phosphor, and when this phosphor is irradiated with excitation light such as visible light, the phosphor changes depending on the accumulated energy. is known to exhibit stimulated luminescence, and phosphors exhibiting this property are called stimulable phosphors (stimulable phosphors).

Using this stimulable phosphor, radiation image information of a subject such as a human body is partially recorded on a sheet of stimulable phosphor, and this stimulable phosphor sheet is scanned with excitation light such as a laser beam to make it shine. The resulting stimulated luminescent light is generated and photoelectrically read to obtain an image signal, and based on this image signal, the radiation image of the subject is recorded as a visible image on a recording material such as a photographic light-sensitive material, a CRT, etc. The applicant has already proposed a radiation image information recording and reproducing system for outputting radiation image information. (Unexamined Japanese Patent Publication No. 55
-12429, 56-11395, 55-18
No. 3472.

No. 5B-104645, No. 55-116340, etc. ) Moreover, the above-mentioned stimulable phosphor sheet is used not only as a means for recording medical images in the above-mentioned radiation image information recording and reproducing system, but also in various fields. He first proposed a method for recording and reproducing electron microscope images using the above-mentioned stimulable phosphor sheet in an electron microscope (Japanese Patent Laid-Open No. 61-51
No. 738, JP-A-61-93539, etc.). This electron microscope image recording and reproducing method basically stores and records the electron beam that has passed through the sample in a vacuum state on a stimulable phosphor sheet that stores electron beam energy, and then uses excitation light on the stimulable phosphor sheet. The energy accumulated through irradiation is emitted as stimulated luminescence light, this emitted light is detected photoelectrically to obtain an image signal, and this image signal is used to reproduce the transmitted radiation image of the sample. .

In this case, the above-mentioned stimulable phosphor sheets are stacked vertically and held in a magazine that can store multiple stimulable phosphor sheets, similar to an electron microscope that uses conventional photographic film, and when photographing or reading. It is possible to take out the stimulable phosphor sheets from the magazine one by one from the magazine, but the stimulable phosphor sheets can be taken out from the magazine one by one, starting with the topmost stimulable phosphor sheet, and the other stimulable phosphor sheets can be taken out one by one from the magazine. A case may be considered in which the processing is performed sequentially starting from the sheet. Among these, the magazine from which the stimulable phosphor sheet is taken out from the lowest position has a slit in the side wall that opens to the side of the lowest stimulable phosphor sheet among the plurality of stored stimulable phosphor sheets. and the lowest stimulable phosphor sheet is taken out through the slit by a sheet extrusion claw that slides in the lateral direction by external operation and pushes out the lowest stimulable phosphor sheet from the slit. is possible.

(Problems to be Solved by the Invention) However, the thickness of the stimulable phosphor sheet is extremely thin (the thickness of the stimulable phosphor sheet used in the above-mentioned electron microscope image recording and reproducing method is about 0.35 mm); In addition, the edges of the stimulable phosphor sheet are rounded and pasted with resin to protect the sheet, and only the lowest stimulable phosphor sheet can be distinguished from other stimulable phosphor sheets. It is difficult to hook and pull out the sheet with the sheet extrusion claw, and there is a possibility that the sheet cannot be taken out often.

The present invention has been made in view of the above-mentioned problems, and it is an object of the present invention to provide a stimulable phosphor sheet that can be reliably taken out one by one from the above-mentioned magazine, and a method for taking out the same. .

(Means for Solving the Problems) The stimulable phosphor sheet of the present invention is characterized in that protrusions having the same height are provided at both ends of the surface outside the image forming area. .

Further, the method for taking out a stimulable phosphor sheet of the present invention includes providing protrusions of equal height on both ends of the surface of the stimulable phosphor sheet parallel to the direction of taking out from the magazine outside the image forming area; It is characterized in that the height of the contact surface of the sheet extrusion claw with the stimulable phosphor sheet is greater than the thickness of the stimulable phosphor sheet.

The protrusion functions as a spacer between the vertically adjacent stimulable phosphor sheet, and may be a protrusion provided over the entire area of both ends, or may be provided intermittently at both ends. It may be a curved protrusion. Furthermore, the surface of the stimulable phosphor sheet means either one of both sides of the stimulable phosphor sheet, and the protrusion is provided outside the image forming area of the stimulable phosphor sheet. When the protrusions are provided on the surface of the stimulable phosphor sheet opposite to the surface on which the image is formed, this means that the protrusions do not overlap with the image forming area on the opposite surface in the thickness direction of the sheet. It is something.

(Function) By providing the protrusion on the stimulable phosphor sheet as described above, the height of the sheet pushing claw can be made larger than the thickness of the stimulable phosphor sheet by the height of the protrusion. Therefore, the sheet push-out claw can reliably engage the stimulable phosphor sheet, and by forming the slit in the magazine so that the stimulable phosphor sheet having a protrusion can be taken out, the stimulable phosphor sheet can be removed. Reliable extraction is possible.

In addition, since the protrusions are formed outside the image forming area of the stimulable phosphor sheet, there is no major problem even if the stimulable phosphor sheet rubs against the adjacent stimulable phosphor sheet when taken out. Compared to other methods, this method does not cause the inconvenience of causing scratches in the image forming area of the stimulable phosphor sheet.

(Example) Hereinafter, an example of the present invention will be described with reference to the drawings.

FIG. 1 is a perspective view of a stimulable phosphor sheet according to an embodiment of the present invention, and FIG. 2 is a side view of a magazine that stores the stimulable phosphor sheet.

The stimulable phosphor sheet 1 of this embodiment is provided with protrusions 2 at both ends of its surface. The protrusions 2 are, for example, made of sponge or the like having the same height, and are provided outside the image forming area IA of the stimulable phosphor sheet 1.

The stimulable phosphor sheet 1 as described above, as shown in FIG. 2 and FIG. 3, which is a cross-sectional view taken along the line X--X of FIG.
A plurality of sheets are stored in the magazine 3 in a stacked state with the surface on which the protrusions 2 are formed facing upward. A side wall 3A of the magazine 3 is provided with a slit 3a for laterally taking out the lowest stimulable phosphor sheet among the stored stimulable phosphor sheets. The slit 3a extends over the width of the stimulable phosphor sheet 1, and is formed to have a height slightly larger than the thickness of the stimulable phosphor sheet 1. Further, each stimulable phosphor sheet 1 is stored in the magazine 3 so that the protrusion 2 is perpendicular to the slit 3a.

On the other hand, a sheet pushing claw 4 is provided at the bottom of the magazine 3. The sheet push-out claw 4 slides in the direction of the arrow along the groove 3b provided at the bottom of the magazine by an external operation, and pushes the lowest stimulable phosphor sheet 1 out of the magazine from the slit 3a. The height of the contact surface 4a of this sheet extrusion claw with the stimulable phosphor sheet is slightly smaller than the sum of the thickness of the stimulable phosphor sheet and the height of the protrusion 2. The stimulable phosphor sheet 1 pushed out by the sheet push-out claw is further pulled out by the nip roller 5 disposed adjacent to the slit 3a, as shown by the dashed line, and is conveyed to the next process.

When the tip of the stimulable phosphor sheet 1 is gripped by the nip roller 5, the sheet push-out claw 4 moves in the direction of arrow B by an external operation.
direction and is returned to the initial position in contact with the right edge of the stimulable phosphor sheet 1.

When the protrusions 2 are provided on the stimulable phosphor sheet 1 as described above, even if the thickness of the stimulable phosphor sheet 10 is small, the height of the sheet push-out claw 4 can be set on the stimulable phosphor sheet 1. The height can be close to the sum of the thickness of the stimulable phosphor sheet 1 and the height of the protrusion 2. According to such a sheet extrusion claw 4, it can be well engaged with the stimulable phosphor sheet 1 and the stimulable phosphor sheet 1 can be The body sheet can be reliably taken out. In addition, since the stimulable phosphor sheets are in contact only with the protrusions formed outside the image forming area and the back surface of the sheet, the image forming area may be scratched when the stimulable phosphor sheet is taken out. There will be no inconvenience such as sticking.

Note that the protrusions may be provided on the surface of the stimulable phosphor sheet opposite to the surface on which the image is recorded, and even in that case, the protrusions may be provided on the portion that does not overlap with the image forming area in the thickness direction of the sheet. It is necessary to form a column. In addition, in this case, each stimulable phosphor sheet must be stored in the magazine with the protrusion facing down so that the image recording area of the lowest stimulable phosphor sheet is not rubbed by the bottom of the magazine. The protrusions extend to the rear end of the stimulable phosphor sheet so that the sheet extrusion claws and the stimulable phosphor sheet can be well engaged, and the sheet extrusion claws extend to the rear end of the stimulable phosphor sheet. It is desirable that the device be placed so as to press near the position where it is provided.

Further, it is only necessary that the stimulable phosphor sheet is provided with a protrusion that functions as a spacer to create an interval between the stacked stimulable phosphor sheets. The projections 12 may be formed intermittently as shown in FIG. Further, one protrusion may be formed in each square on the back surface of the stimulable phosphor sheet, and the number and shape thereof can be varied. The material for the protrusions and protrusions may be any material other than sponge as long as it does not hinder the sliding of the stimulable phosphor sheet and does not easily cause scratches (for example, stimulable phosphor sheet A material made of the same material as the sheet may also be attached.

(Effects of the Invention) As explained above, according to the stimulable phosphor sheet and the method for taking out the same of the present invention, the protrusion is provided on the stimulable phosphor sheet to reduce the interval when the stimulable phosphor sheets are stacked. By leaving space open, the sheet push-out claw and the stimulable phosphor sheet can be reliably engaged and the stimulable phosphor sheet can be taken out without failure. Furthermore, since the image forming area of the stimulable phosphor sheet does not come into contact with the adjacent stimulable phosphor sheet, it is possible to prevent the stimulable phosphor sheet from being scratched when taken out.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of a stimulable phosphor sheet according to an embodiment of the present invention, FIG. 2 is a side view of a magazine that stores the stimulable phosphor sheet, and FIG. 3 is taken along line X-X in FIG. 4 is a schematic diagram of a stimulable phosphor sheet according to another embodiment of the present invention. 1... Stimulable phosphor sheet IA... Image forming area 2... Projections 3...
Magazine 3a...Slit 4...Sheet extrusion claw 12...Protrusion Drawing 1 Figure 2

Claims (1)

[Scope of Claims] 1) A stimulable phosphor sheet having protrusions of equal height on both ends of the surface outside the image forming area. 2) A magazine in which stimulable phosphor sheets stacked in the vertical direction are housed, and the side wall has a slit that opens to the side of the lowest stimulable phosphor sheet among the stored stimulable phosphor sheets. The stimulable phosphor sheets are removed one by one by a sheet push-out claw that slides in the lateral direction by an external operation and pushes out the lowest stimulable phosphor sheet from the slit. In the take-out method, protrusions having the same height are provided on both ends of the surface of the stimulable phosphor sheet parallel to the take-out direction outside the image forming area, and the extrusion claws are connected to the stimulable phosphor sheet. A method for taking out a stimulable phosphor sheet, characterized in that the height of the contact surface is greater than the thickness of the stimulable phosphor sheet.