Abstract: In a radiation image read-out apparatus, a phosphor sheet (70), represented by the formula Gd.sub.2 O.sub.2 S:Tb.sup.3+, is located facing a stimulable phosphor sheet (10) in such a manner that when it is exposed to x-rays (44) it produces fluorescence (71) having a wavelength that fall within the stimulation wavelength range of the stimulable phosphor. When the stimulable phosphor sheet (10) is exposed to the fluorescence (71), part of the energy stored on the layer of stimulable phosphor during its exposure to the x-rays (44) is released. In this manner, the stimulable phosphor sheet (10) is approximately simultaneously subjected to the operation for recording the radiation image and the operation for slightly erasing the energy store thereon during its exposure to the x-rays (44).

Abstract: A method and apparatus for recording the information from the slidable sheet (5) of a RIM cassette (2). The information included on the sheet, used especially in X-ray photography, is read from the sheet surface drawn out of the cassette with the aid of a laser beam focused on it, after which the sheet is emptied of information with the aid of a powerful light and returned to the cassette. According to the invention, the reading is effected during the linear withdrawal of the slidable sheet (5) in the reading position (9) past which the sheet surface including the information is guided, and the removal of the information is effected during the linear return travel of the slidable sheet in the emptying position (10) past which the sheet surface travels while the sheet is being pushed back into the cassette (2).

Abstract: Multiple x-ray images are encoded onto a single storage phosphor screen detector for later scanning, processing, and viewing. The x-ray images are encoded using spatial frequency multiplexing onto high frequency carriers. The encoding process relies only on light with no mechanical motion. The light erases selected portions of the image data but leaves sufficient information to reconstruct the original images. The reconstruction process relies on conventional sampling theory with the additional step of solving a system of equations for the individual x-ray image information.

Abstract: A stimulable phosphor sheet cassette has a light-tight casing which has an opening through which a stimulable phosphor sheet can be got in and out of the casing by moving the stimulable phosphor sheet in a direction parallel to the surface thereof and a light shielding member provided at the opening to prevent light from entering the casing but to permit the stimulable phosphor sheet to move through the opening. The casing is in such a size that it receives the stimulable phosphor sheet with one end portion of the stimulable phosphor sheet projecting outside the casing through the opening.

Abstract: The present invention relates to a method of erasing a radiation image information which remains on a stimulable phosphor sheet on which the radiation image information is stored and recorded. This method is employed in a medical diagnosis system. The medical diagnosis system basically comprises a console, an X-ray controller, a radiation image information recording and reading apparatus, and an image output apparatus. Further, the residual radiation image information erasing method referred to above comprises the steps of specifying an area for recording the radiation image information stored and recorded on the stimulable phosphor sheet, based on exposure information, and erasing only radiation image information which remains in the specified recording area on the stimulable phosphor sheet.