The collimation system null electron beam for the duplex slice electron beam tomogram

摘要

PROBLEM TO BE SOLVED: To collimate X-ray fan beam at a plurality of slice widths using a single collimator in a duplex slice EBT (electron beam tomography).;SOLUTION: The collimator 36 has an inner wall and an outer wall which are disposed concentrically with each other to enclose a patient inspection region. The inner wall and the outer wall are respectively provided with a first set of apertures positioned to form a beam after a first collimate having a first width and a beam after a second collimate having a second width by collimating X-ray fan beam 38. The respective collimated beams can form both a single tomographic slice and double tomographic slice. These collimated beams are detected by a pair of detector arrays 20, 21.;COPYRIGHT: (C)2004,JPO