ENHANCED LIGHT DETECTOR FOR COMPUTED RADIOGRAPHY

摘要

A scanning apparatus for obtaining an image from a phosphor sheet has a cylindrical drum having an inner axis and having an inner surface that is concave with respect to the axis. A light collector is coupled to a transport mechanism that is actuable to translate the light collector along a direction parallel to the axis. The light collector has a beam generator with a light source and a rotatable beam deflector that is actuable to provide a rotating scanning beam. There are first and second cylindrical hoops circumferentially disposed about the axis and spaced apart from each other along the direction of the axis to define a slot aligned with the rotating scanning beam as it scans the phosphor sheet. At least one light detector is disposed to detect light stimulated from the phosphor sheet by the scanning beam.