Patent ID: 7208740
Filing Date: 2007-04-24
Classification: G01T

Abstract:
1. A method for detecting radiation comprising: providing a three-dimensional radiation detector including a plurality of thin semiconductor crystal detector parallax error reduction modules, each of said parallax error reduction modules including first and second oppositely facing planar surfaces and at least one photon receiving edge surface between said planar surfaces, said first planar surface having formed thereon a single monolithic cathode and said second planar surface having formed thereon a two-dimensional array of pixelated anodes, outputs of said two-dimensional array of pixelated anodes containing information useful for determining depth of interaction of photons received at said at least one photon receiving edge surface, the depth of interaction being indicated by a location of an anode sensing photon absorption, said plurality of thin semiconductor crystal detector parallax error reduction modules being arranged in a stack such that photon receiving edge surfaces thereof together define a photon receiving surface extending in two dimensions, and together providing photon impingement location information in said two dimensions, and said depth of interaction indicating information providing photon travel information indicating photon travel having a component in a third dimension, perpendicular to said two dimensions; disposing said detector to receive radiation impinging thereon at said photon receiving surface; determining a depth of interaction of a photon of said radiation; employing said depth of interaction to eliminate parallax error; and employing said depth of interaction to determine a direction of trajectory of photons in said radiation.