Methods and apparatus for reducing spectral artifacts in a computed tomograph system

摘要

Methods and apparatus for reducing spectral artifacts in a computed tomography (CT) system (10) are described. In one embodiment, the CT system (10) includes a plurality of multislice detector modules (20), a detector housing (50) and a collimator (62) adjacent the detector modules (20). Each detector module (20) is mounted to the detector housing (50) and includes a scintillator array (56). The collimator (62) includes a plurality of plates (64) that are positioned so that a x-ray beam shadow is centered over gaps in the scintillator array (56). In operation, the collimator (62) separates the x-ray beams (16) so that the scintillator gaps are protected and the x-ray beams (16) are prevented from projecting through the scintillator array elements along a shortened length path.