An x-ray shielding system includes a beam controller configured to surround an x-ray source and includes a detector shield configured to position behind an x-ray detector. The beam controller includes a source shield and an aperture. The source shield and the detector shield are adapted to block x-rays,...http://www.google.co.uk/patents/US6618465?utm_source=gb-gplus-sharePatent US6618465 - X-ray shielding system and shielded digital radiographic inspection system and method
