A scanning radiographic system having reduced scatter and improved tube loading employs a pre-patient slit to form the x-ray beam into a fan beam and a post-patient slot to eliminate scattered rays from the fan beam. A grid incorporated into the slot permits a further reduction of scatter sufficient...http://www.google.fr/patents/US5418832?utm_source=gb-gplus-shareBrevet US5418832 - Scanning radiographic device with slit, slot and grid
Scanning radiographic device with slit, slot and grid
