Cadmium zinc telluride (Cd0.8Zn0.2Te) is nowadays one of the most promising room temperature semiconductors for X- and γ-ray detection. Indeed, its physical characteristics make this detector very suitable for operating under high-intensity fluxes, such as those produced by linear accelerators. For this reason, CdZnTe has been chosen for the set-up of a tomographic facility based on a 12-MeV linear accelerator. This system is a first generation tomograph; it has already been used for preliminary phantoms image acquisition, showing rather good imaging capabilities. The polychromaticity of the source may induce severe beam-hardening artifacts in the final tomographic images. Extensive experimental studies have been carried out to optimize correction algorithms able to reduce such artifacts. A set of images of relevant samples have been acquired in order to evaluate the relationship between the absorption coefficients and the resulting CT numbers.
High energy tomography using cadmium zinc telluride detectors / Rossi M.; Baldazzi G.; Querzola E.; Guidi G.; Scannavini M.G.; Chirco P.; Zanarini M.; Casali F.; Azevedo S.. - In: NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH. SECTION A, ACCELERATORS, SPECTROMETERS, DETECTORS AND ASSOCIATED EQUIPMENT. - ISSN 0168-9002. - STAMPA. - 380:1-2(1996), pp. 419-422. [10.1016/S0168-9002(96)00385-3]
High energy tomography using cadmium zinc telluride detectors
Rossi M.;Baldazzi G.;Guidi G.;Chirco P.;Zanarini M.;Casali F.;
1996
Abstract
Cadmium zinc telluride (Cd0.8Zn0.2Te) is nowadays one of the most promising room temperature semiconductors for X- and γ-ray detection. Indeed, its physical characteristics make this detector very suitable for operating under high-intensity fluxes, such as those produced by linear accelerators. For this reason, CdZnTe has been chosen for the set-up of a tomographic facility based on a 12-MeV linear accelerator. This system is a first generation tomograph; it has already been used for preliminary phantoms image acquisition, showing rather good imaging capabilities. The polychromaticity of the source may induce severe beam-hardening artifacts in the final tomographic images. Extensive experimental studies have been carried out to optimize correction algorithms able to reduce such artifacts. A set of images of relevant samples have been acquired in order to evaluate the relationship between the absorption coefficients and the resulting CT numbers.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.