The aim of this paper is to investigate the properties of a clinical FFDM unit (Giotto-Image MD, IMS Italy). The digital detector consists of a flat panel using the amorphous selenium technology (ANRAD Corporation, Canada). The active area of the imager is 17.4 cm x 23.9 cm (2048 x 2816 pixels) with a pixel pitch of 85 gm. The direct conversion of X-rays into charge provides excellent imaging performance. In this work we present an objective and complete characterization of such system: detector response, MTF, NPS and DQE calculation will be presented. MTF and DQE at Nyquist frequency (5.88 lp/mm) are equal to 38% and 15%, respectively. The detector linearity is very good under the typical mammographic tested exposure conditions.
Albanese, A., Bevilacqua, A., Campanini, R., Iampieri, E., Lanconelli, N., Rossi, M., et al. (2003). Characterization of an FFDM unit based on a-Se direct conversion detector. Springer, Berlin, Heidelberg [10.1007/978-3-642-59327-7_15].
Characterization of an FFDM unit based on a-Se direct conversion detector
Alessandro Bevilacqua;Renato Campanini;Nico Lanconelli;Massimo Rossi;Davide Romani;
2003
Abstract
The aim of this paper is to investigate the properties of a clinical FFDM unit (Giotto-Image MD, IMS Italy). The digital detector consists of a flat panel using the amorphous selenium technology (ANRAD Corporation, Canada). The active area of the imager is 17.4 cm x 23.9 cm (2048 x 2816 pixels) with a pixel pitch of 85 gm. The direct conversion of X-rays into charge provides excellent imaging performance. In this work we present an objective and complete characterization of such system: detector response, MTF, NPS and DQE calculation will be presented. MTF and DQE at Nyquist frequency (5.88 lp/mm) are equal to 38% and 15%, respectively. The detector linearity is very good under the typical mammographic tested exposure conditions.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
