Method for removing artifact and for correcting sensitivity of single photon emission computerized tomography and apparatus thereof

摘要

In a single photon emission computerized tomographic (SPECT) image acquiring method by receiving via a fan-beam collimator (7) radiation emitted from a radio isotope (RI) supplied into a biological body under medical examination with employment of a gamma camera (8), there are provided the steps of: acquring first projection image data by receiving via the fan-beam collimator (7) radiation emitted from reference RI source means (9); processing said first projection image data to obtain first correction data; acquiring second projection image data by receiving via said fan-beam collimator (7) said radiation emitted from said radio isotope injected into the biological body; correcting said second projection image data with said first correction data so as to obtain third projection image data from which an artifact component has been eliminated; and, reconstructing a SPECT image of the biological body under medical examination based upon said third projection image data free from the artifact component.