We are developing a digital radiography system based on double sided microstrip silicon crystal. The read-out system consists of a VLSI integrated circuit that has the following properties: low noise preamplification, pulse shaping, threshold discrimination. The current signals coming out of the integrated circuit are converted into TTL level signals by discrete component electronics. A Time-to-Digital-Converter+Transputer-based acquisition system reads the TTL signals and reconstructs the impact point of the incident photon. We made a study of the spatial resolution by measuring the Square Wave Resolution Function. To test the imaging capability of the system, we made some radiographs of low contrast (< 10%) phantoms. Moreover, an image of a small sample of bone tissue has been obtained by scanning technique (average contrast of the phantom is 20%).
Development of a digital radiography system based on silicon microstrip detector / Beccherle, R.; Bertolucci, E.; Bisogni, M. G.; Bottigli, U.; Collins, T.; Conti, M.; Del Guerra, A.; Fantacci, M. E.; Gambaccini, M.; Kipnis, I.; Marchesini, R.; Marziani, M.; Rosso, V.; Russo, P.; Russo, S.; Stefanini, A.; Taibi, A.; Tripiccione, R.. - In: PHYSICA MEDICA. - ISSN 1120-1797. - 12:1(1996), pp. 17-24.
Development of a digital radiography system based on silicon microstrip detector
Russo P.;Russo S.;
1996
Abstract
We are developing a digital radiography system based on double sided microstrip silicon crystal. The read-out system consists of a VLSI integrated circuit that has the following properties: low noise preamplification, pulse shaping, threshold discrimination. The current signals coming out of the integrated circuit are converted into TTL level signals by discrete component electronics. A Time-to-Digital-Converter+Transputer-based acquisition system reads the TTL signals and reconstructs the impact point of the incident photon. We made a study of the spatial resolution by measuring the Square Wave Resolution Function. To test the imaging capability of the system, we made some radiographs of low contrast (< 10%) phantoms. Moreover, an image of a small sample of bone tissue has been obtained by scanning technique (average contrast of the phantom is 20%).I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.