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.
