JPS60153000A - Pack for carrying accumulating phosphor sheet at high speed - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of the Invention) The present invention relates to a stimulable phosphor sheet used in a radiation image information recording and reproducing system that stores and records radiation image information and then reproduces it on a high-speed imaging stand. The present invention relates to a pack for high-speed transport used during transport, and particularly to a pack for high-speed transport that has excellent workability when noise erasing of a reused stimulable phosphor sheet is performed immediately before photographing.

(Technical Background of the Invention and Prior Art) High-speed imaging tables have been used for angiography and the like. This is a method of sequentially projecting xIil transmission images onto a large number of X-ray films. Especially when the diffusion speed of the contrast agent differs depending on the patient, such as in angiography, it is sometimes necessary to It is suitable for sequentially photographing angiographic images that change moment by moment.

In the above-mentioned high-speed imaging platform, the X-ray film is used in the form of, for example, sandwiched between two intensifying screens and stored in a flexible light-shielding pack, so that it will not be exposed to light or scratched during transportation. This is taken into consideration.

The high-speed imaging platform that uses the pack containing the X-ray film has a first storage section that stores the pack that has not yet been imaged, and an imaging platform that moves the pack from this storage section and exposes the X-ray transmitted image onto the X-ray film. a transport mechanism that sequentially transports photographed packs at high speed to positions and exposed at the photographing positions; and a second transport mechanism that stores photographed packs that have been transported at high speed.
It has a storage section so that a subject can be placed above the photographing stand.・Since X-ray film is extremely photosensitive,
A good image cannot be obtained unless a complete light shielding condition is maintained from before removal to the time of development. Therefore, the pack used in the above-mentioned type of imaging stand is formed into a bag-like shape using a black plastic sheet that sufficiently shields the X-ray film from light.

On the other hand, recently, a radiation image recording and reproducing system using a stimulable phosphor as described below has been proposed.

Here, storage fluorophores are radiation (X-rays, α-rays, β-rays, γ-rays,
When it is irradiated with radiation (rays, ultraviolet rays, etc.), it accumulates a portion of this radiation energy, and then when it is irradiated with excitation light such as visible light, it exhibits stimulated luminescence according to the accumulated energy.
A fluorescent substance. The above-mentioned radiation image recording and reproducing system utilizes this stimulable phosphor, and once the radiation image information of the human body, etc. ), this stimulable phosphor sheet is scanned with excitation light such as a laser beam to generate stimulated luminescent light, and the resulting stimulated luminescent light is read out photoelectrically to generate an image signal. Based on this image signal, the radiation image is reproduced as a visible image on a recording material Y1 such as a photographic light-sensitive material or on a display device such as a CRT. (
JP-A-55-12429, JP-A-56-11395, etc. ) This system has the practical advantage of being able to record and reproduce images over a much wider radiation exposure range than conventional radiographic systems using intensifying screens and X-ray film. However, in the case of storage fluorophores,
It has been recognized that the amount of emitted light that is stimulated and emitted by excitation after accumulation is proportional to the amount of radiation exposure over an extremely wide range. Therefore, even if the amount of radiation exposure varies considerably depending on various imaging conditions, The light intensity of the emitted light is read by a photoelectric conversion means with the reading gain set to an appropriate value and converted into an electrical signal, and this electrical signal is used to display a radiation image on a recording material such as a photographic light-sensitive material or a display device such as a CRT. By reproducing the image as a visible image, it is possible to obtain a radiation image that is not affected by fluctuations in radiation exposure.

In addition, according to this system, the radiation image information stored and recorded in the stimulable phosphor is converted into an electrical signal, then subjected to appropriate signal processing, and this electrical signal is used to transfer the radiation image to a recording material such as a photographic light-sensitive material. , suitable for observation and interpretation (appropriate for diagnosis) by reproducing it as a visible image on a display device such as a CRT.
The extremely large effect of being able to obtain excellent radiographic images can also be obtained.

Even in a radiographic image recording and reproducing system using this stimulable phosphor sheet, if a high-speed imaging platform like that used in the conventional X1Jllfl shadow can be adopted, it will be possible to capture a large number of radiographic images with excellent diagnostic suitability as described above at high speed. The diagnostic effect is extremely large. In particular, since the high-speed imaging table is suitable for angiography as mentioned above, if it is adopted in a radiographic image recording and reproducing system using this stimulable phosphor sheet, the diagnostic performance of angiography can be further improved. The contribution it makes to medical diagnosis is extremely large.

Therefore, the conventionally used X-ray film pack described above was adopted for the high-speed imaging stand used in the radiation image recording and reproducing system described above, and the stimulable phosphor sheet was housed in a light-shielding pack. It is possible to load it into.

By the way, in the radiation image recording and reproducing system using the above-mentioned stimulable phosphor sheet, it is economical to use the stimulable phosphor sheet repeatedly. In order to prevent the generation of noise caused by the radiation energy of the imaging and the radiation accumulated in the sheet 1 while left until the next imaging (1) IFA energy (environmental radiation energy, etc.), the sheet is heated immediately before the imaging. Excitation light is irradiated to erase the radiation energy accumulated in the sheet (hereinafter referred to as "noise erasure" -0). (Refer to Japanese Patent Application Laid-Open No. 116300/1983, Japanese Patent Application No. 83797/1983, etc.).

Therefore, in a high-speed imaging stand applied to a radiation image recording and reproducing system using a stimulable phosphor sheet, the conventional
When using a light-shielding pack for line film as a pack for stimulable phosphor sheets, the stimulable phosphor sheet is removed from the pack, the noise is eliminated, and then the sheet is put back into the pack and exposed to high-speed X-rays. Since line photography must be performed, there are difficulties in workability. Moreover, in a system using a stimulable phosphor sheet, there is no need to block light from the stimulable phosphor sheet before radiography (that is, before a radiation image is stored and recorded); Since the light-shielding property required of the light sheet is extremely low compared to that of X-ray film, it is not a good idea to use conventional packs for X-ray film as they are.

Therefore, in consideration of the special characteristics of the radiation image recording and reproducing system that uses this stimulable phosphor sheet, we have developed a stimulable phosphor sheet that can be used to easily eliminate noise from the stimulable phosphor sheet before imaging. A transport pack is desired.

(Objective of the Invention) In light of the technical background as mentioned above, the object of the present invention is to provide a high-speed photographic stand that can perform noise cancellation with the stimulable phosphor sheet stored. An object of the present invention is to provide a suitable novel stimulable phosphor sheet transport pack.

(Structure of the Invention) The high-speed conveyance pack of the present invention consists of two sheets, an upper sheet and a lower sheet, which are large enough to accommodate a stimulable phosphor sheet in a manner that allows it to be taken in and out. The present invention is characterized in that at least one of the sheets is made of a material that transmits noise erasing light and X-rays.

Here, the upper sheet and the lower sheet may be separate bodies,
Alternatively, it may be formed by folding one sheet and arranging two upper and lower sheets in series.

The term "noise erasing light" refers to light used during noise erasing, and specifically, it is light whose light source is a tungsten lamp, a fluorescent lamp, a sodium lamp, a xenon discharge lamp, a xenon flash lamp, or the like.

(Operations and Effects of the Invention) As described above, in the high-speed conveyance pack of the present invention, at least one of the upper sheet and the lower sheet constituting the pack is formed of a material that transmits noise-eliminating light and X-rays. Therefore, if the stimulable phosphor sheet is stored in the pack so that the stimulable phosphor layer faces the side of the sheet made of the material, noise can be eliminated in that state before high-speed X-ray imaging. can be done. After photographing, the stimulable phosphor sheet requires some degree of light shielding until it is read, but it is sufficient to store and transport the sheet in a dark box or the like as a pack.

Since the pack of the present invention does not require the insertion and removal of the stimulable phosphor sheet when erasing noise, it not only has superior workability when erasing noise compared to the light-shielding pack described above, but also eliminates the stimulable phosphor sheet. There is less possibility that the body sheet will be damaged, and therefore a better reproduced image can be obtained.

(Embodiments) Hereinafter, embodiments of the high-speed transport pack of the present invention will be described with reference to the drawings.

FIG. 1 and FIG. 2 show an embodiment of the pack of the present invention.
It is a perspective view which does not show the state in which the mouth is closed and the state in which the mouth is opened. In this embodiment, an upper sheet 1A and a lower sheet 1B, both of which are made of a flexible material that passes through noise-cancelling light and X-rays, are arranged such that - side 10 and two sides 11. It is formed by heat-sealing the parts 11a and 128 that are close to the - side 10, and accommodates one side 13 opposite to the - side 10 and the parts 11b and 12b of the two sides that are close to the opposite side 13. The sheet is partially exposed. Among this released part, on the released side 13, there are many gllIll
A so-called hook-and-loop fastener consisting of a fiber side 13A with hook-shaped fibers and a B-side 13B with a large number of fine loop-shaped fibers is provided, and the open side 13 is removably closed, and the upper and lower sheets 1A and 1B can be separated from each other at this part. is prevented. moreover,
On the back side of this open side 13, there is a flap 13 facing inward.
A flap 13C is provided so that the stored stimulable phosphor sheet comes into contact with or is locked to this flap 13C, thereby making it even more reliable to prevent sheets from being pulled out, and to prevent excess sheets from being stored in the pack. It regulates movement.

By providing this pack with an ID display section 14 (see Figures 1 and 2) made of lead or a material that does not transmit or is difficult to transmit X-rays, the I'D No. at the time of imaging can be displayed at the same time as the imaging. The ID No. can be recorded on a stimulable phosphor sheet.

FIGS. 3 and 4 are perspective views of another embodiment of the pack of the present invention, showing the closed and open states, respectively. In this embodiment, sheets 2A and 2B, both of which are made of a material that transmits noise-cancelling light and X-rays, are heat-sealed on three sides 20, 21, and 22 to form a bag shape with only one side open. The open side is provided with mouth edges 2a and 2b that open up and down, and these mouth edges 2
A hook-and-loop fastener 2C is provided on the back surfaces of a and 2b. The stimulable phosphor sheet 25 is accommodated, handled, and conveyed inside the seal portions 20, 21, 22 on three sides and the hook-and-loop fastener 2C, as shown by the dashed lines.

It goes without saying that the high-speed transport pack of the present invention is not limited to the embodiments described above, and various modifications can be made.

For example, noise light and X-rays can be transmitted through both the upper and lower sheets.
It is not necessary to form the upper sheet with a material that is resistant to water, and it is sufficient to form only the upper sheet with the material. In this case, the stimulable phosphor sheet is stored in the pack so that the stimulable phosphor layer faces the upper sheet side.

In addition, -[the adhesive part of the lower sheet, the attached film part and the adhesive/
The attachment/detachment means may be configured in any manner as long as the stimulable phosphor sheet can be freely stored in and out of the pack without damaging it and the sheet is not separated from the pack during high-speed conveyance. may have been done.

By fixing these transport packs on the transport belt in a high-speed photographing device, it is possible to transport them within the photographing device at high speed, but for this purpose, for example, as shown in FIG. Hook-and-loop fasteners 15, 15 are installed on the surface of 2B, and these hook-and-loop fasteners are placed on the conveyor belt.
15, 15 are provided, and by using these hook and loop fasteners, the pack can be attached and detached freely＼ Transport, it may be fixed to the belt, or it can be attached to two opposing belts. It may be sandwiched.

[Brief explanation of drawings]

FIG. 1 is a perspective view showing an embodiment of the stimulable phosphor sheet high-speed conveyance pack of the present invention, FIG. 2 is a perspective view showing the open state, and FIG. Another fruit of phosphor sheet high-speed transport pack 1
FIG. 4 is a perspective view showing the JIiii embodiment, FIG. 4 is a perspective view showing the mouth open state, and FIG. 5 is a rear view of the embodiment shown in FIG. 1 or 3. 1A...Top sheet 1B...Bottom sheet 10...Sealed one side 11.12...Partially released, partially sealed two sides 13
... released sides 13A, 13B ... hook and loop fastener 13C ... flap 14 ... ID display section 15 ...
・Loop fastener 2A...Top sheet 2B...Lower sheet 2a12b...Edge 2c...Loop fastener 20, 21, 22...Three sealed sides 25...Accumulative fireflies light sheet

Claims (1)

[Claims] (1) A pack in which a stimulable phosphor sheet is stored between two sheets larger than the stimulable phosphor sheet, in which the stimulable phosphor sheet can be taken in and out, and at least one of the two sheets is exposed to a noise erasing light. A pack for high-speed conveyance of a stimulable phosphor sheet, characterized in that it is made of a material that transmits X-rays.