Therapeutic or diagnostic isodose analysis - using tomography appts. with single X=ray tube and scintillators or multipliers for energy detection

摘要

Therapeutic or diagnostic isodose analysis is carried out by means of X-ray computer tomography. A tomography appts. with a single X-ray tube is provided on the detector side with scintillators and multipliers for detecting the energies of individual quanta. These are detected separately in certain energy zones in multi-channel analysers, to provide information on the distribution patterns of the absorptions coeffts. for two or more energy zones. The X-ray tube does not produce quanta is a sharply defined energy zone, but provides a continuous spectrum covering the whole range between very low energy levels and the max. quantum energy corresponding to operating voltage.