Method for calibrating the intensity profile for a movable X-ray source

摘要

An imaging systemÄ50Ü and method for using the same is disclosed. The imaging systemÄ50Ü includes an x-ray detection arrayÄ51Ü or plurality of detection arrays, a point x-ray source, and a controllerÄ54Ü. The point x-ray source moves relative to a detection arrayÄ51Ü, each of the x-ray detectors subtending a solid angle at the point source that depends on the relative position of the point source and the detection arrayÄ51Ü and on the location of the detector in the detection arrayÄ51Ü. The signal generated by each x-ray detector depends on a calibration parameter that is independent of the solid angle subtended by that x-ray detector at the point source. The controllerÄ54Ü stores a tableÄ56Ü of calibration values that determines the calibration parameter for each of the x-ray detectors. The controllerÄ54Ü corrects the signals generated by the x-ray detectors for solid angle and for variations in the calibration parameter. <IMAGE>