Patent ID: 7026623
Filing Date: 2006-04-11
Classification: A61B,G01T,G06T

Abstract:
1. A method of diagnostic imaging in shortened acquisition time for obtaining a reconstructed diagnostic image of a portion of a body of a human patient who was administered with dosage of radiopharmaceutical substance radiating gamma rays, using SPECT (single photon emission computerized tomography), for determination of functional information thereon, comprising the steps of: (a) acquiring photons emitted from said portion of the body, by means of at least one detector capable of converting the photons into electric signals, said detector comprises a collimator having a plurality of elongated bores, wherein acquiring photons emitted from said portion of the body comprises acquiring adjacent angular projections separated by at least 5 degrees; (b) processing said electric signals by a position logic circuitry and thereby deriving data indicative of positions on said at least one detector, where the photons have impinged the detector; and reconstructing a diagnostic image of a spatial distribution of the pharmaceutical substance within the portion of the body by iteratively processing said data, said iteratively processing comprises utilizing weight values derived from functions of either solid angles or solid angles and distances between different discrete elements of the portion of the body and corresponding discrete elements of the angular projection of the portion of the body on the detector.