REMOVAL OF SPECTRAL ARTIFACTS AND UTILIZATION OF SPECTRAL EFFECTS IN COMPUTERIZED TOMOGRAPHY

摘要

PATENT APPLICATIONOFEDWARD J . SEPPIforREMOVAL OF SPECTRAL ARTIFACTS AND UTILIZATION OFSPECTRAL EFFECTS IN COMPUTERIZED TOMOGRAPHYAbstractIn an instrument for reconstructing computerizedtomograms utilizing penetrating radiation, typically % orgamma radiation,an apparatus and technique are disclosedfor removing spectral artifacts and utilizing spectral effectsto create output pictures which represent facsimiliesof the distribution of molecules according to atomicnumber and electron density within the object beingpictured. Combinations of these pictorial representationsare also obtained. Reconstruction errors caused bypanchromaticity in the radiation source are avoided.Attenuation within the object by means of photoelectricabsorption, Compton scattering and Rayleigh scattering areisolated and analyzed separately.