A combined format gamma-ray detector (D) for measuring impinging gamma-rays (10) includes an active upper level coded aperture detector plane member (12) that is suitable for detecting an impinging gamma-ray (10). An active lower level gamma ray detector plane member (14) that is spaced apart from the...http://www.google.es/patents/US7541592?utm_source=gb-gplus-sharePatente US7541592 - Coded aperture compton telescope imaging sensor
