IMPROVED IMAGING SYSTEM

摘要

An X-ray scanning system for high speed imaging of an object using an X-ray source for generating a fan shaped X-ray beam (12) for traversing a linear section or slice of the object, and a linear array of detectors (14) on the opposite side of the object (10) from the source which generate light depending on the X-ray image incident thereon, wherein optical fibres (16) link the detectors to the input of an image intensified CCD camera (18), the fibre ends forming a planar array having an aspect ratio which is different from that of the linear array of detectors and which matches the aspect ratio of the camera, the detector array having an addressable array of NXM pixels which during read-out are addressed in groups (superpixels) to enable a higher read-out speed to be obtained than if the pixels were read out individually, and each said superpixel having an aspect ratio of A to B (where A/B is greater than 1), the orientation of the superpixels being selected so as to produce a higher scanning resolution between regions of the CCD camera which correspond to signals from detectors which are widely spaced and a lower scanning resolution in the perpendicular direction.