Method of and apparatus for calibration of CT scanners

摘要: In an improved CT scanner calibration method and apparatus, a radiation beam, for example x-ray is directed at plurality of detectors. The beam attenuated by phantom known attenuation characteristics. detectors generate measured data from the beam. back-projected to image. image converted ideal forward projected data. Calibration values each detector channel in are generated cross-referencing preferred embodiment, this cross-referenced compressed stored look-up table referencing during later interrogation subjects. This technique takes advantage inherent mechanical accuracy perform calibration, rather than imposing requirements geometry precision or exact placement