Patent ID: 6890098
Filing Date: 2005-05-10
Classification: G01N

Abstract:
1. An imaging system comprising: an x-ray detection array comprising a plurality of x-ray detectors, each x-ray detector generating a signal indicative of the x-ray energy absorbed by said x-ray detector and being located at a location in said detection array; a point x-ray source that moves relative to said detection array, each x-ray detector subtending at said point source a solid angle that depends on a relative position of said point source and said detection array and on said location of said detector in said detection array; and a controller, wherein said signal generated by each x-ray detector depends on a calibration parameter that is independent of said solid angle subtended by that x-ray detector at said point source, wherein said controller comprises a memory that stores a table of calibration values that determines said calibration parameter for each of said x-ray detectors, and wherein said controller corrects said signals generated by said x-ray detectors for variations in said solid angle subtended by each of said x-ray detectors and for variations in said calibration parameter.