| 摘要 |
A read-out system for a luminescent storage screen, in which a latent x-ray image is stored, includes a read-out radiation source formed by a bank of light emitting diodes which are respectively individually coupled to picture elements to be scanned, such as those in a line of the storage screen. A control circuit is connected to the light emitting diodes which drives the diodes in coded fashion on the basis of a transformation, such as a Hadamard-Walsh transformation, so that a number of light emitting diodes are simultaneously energized. The total stimulated light emitted by a corresponding number of picture elements is detected, and is used to form coefficients for the transformation. A calculating stage is connected to the light detector, which calculates brightness values for each picture element from these coefficients by reverse transformation. The brightness values are displayed on an image reproduction system.
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