| 摘要 |
<p>A radiation-image reading apparatus using a phosphor layer (1) in the form of a disk (9) for recording a radiation image and capable of rotating. The phosphor layer is scanned with the excitation light (2) while it is rotated and the irradiation spot of the excitation light is moved in the radial direction (A) of the phosphor layer, thereby reading an intensity I of light emitted from the phosphor layer at each of different points thereon and the position of this emission represented by, for example, a radius R and an angle of rotation theta of the disk. The scanning is effected along concentric circles on the phosphor layer so that items of information thereon are successively read. If a certain significant image has been recorded on a concentric circle, it is not always necessary to scan the entire area of the phosphor layer, and the image can be read by being circularly scanned only one or several times.</p> |
