IMAGING DEVICE FOR IMAGING RADIATION

摘要

An imaging device for imaging radiation includes an image cell array (10). The image cell array includes an array of detector cells (18) which generate charge in response to instant radiation (14) and an array of image cell circuits. Each image cell circuit is associated with a respective detector cell. The image cell circuit includes counting circuitry for counting plural radiation hits incident on an associated detector cell. Preferably, the image cell circuit includes threshold circuitry connected to receive signals generated in the associated detector cell and having values dependent on the incident radiation energy. The counting circuitry is then connected to the threshold circuitry for counting only radiation hits within a predetermined energy range or ranges.