The purpose of this study is to evaluate the physical characteristics of various apparatus dedicated to mammography: a film-based cassette system and three clinical digital mammography equipments. Their image quality has been assessed, by performing a physical characterization and a contrast-detail analysis. We considered three different FFDM systems: a Computed Radiography unit, the Fuji “FCR 5000 MA Plus”, and two diverse flat-panel units, the indirect conversion a-Si based GE “Senographe 2000D” and the direct conversion a-Se based IMS “Giotto Image MD”. The physical characterization has been estimated, by measuring the MTF, NPS and DQE of the detectors with no anti-scatter grid and in a clinical range of exposures. The contrast-detail analysis has been achieved, by using a CDMAM 3.4 phantom and an in-house made software, for the automatic computation of the contrast-detail curves. The performance of the different systems are presented, in terms of MTF, DQE and contrast-detail curves.
Physical characterization and contrast-detail analysis of different mammography units
CAMPANINI, RENATO;LANCONELLI, NICO;
2004
Abstract
The purpose of this study is to evaluate the physical characteristics of various apparatus dedicated to mammography: a film-based cassette system and three clinical digital mammography equipments. Their image quality has been assessed, by performing a physical characterization and a contrast-detail analysis. We considered three different FFDM systems: a Computed Radiography unit, the Fuji “FCR 5000 MA Plus”, and two diverse flat-panel units, the indirect conversion a-Si based GE “Senographe 2000D” and the direct conversion a-Se based IMS “Giotto Image MD”. The physical characterization has been estimated, by measuring the MTF, NPS and DQE of the detectors with no anti-scatter grid and in a clinical range of exposures. The contrast-detail analysis has been achieved, by using a CDMAM 3.4 phantom and an in-house made software, for the automatic computation of the contrast-detail curves. The performance of the different systems are presented, in terms of MTF, DQE and contrast-detail curves.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
