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Proceedings Paper

Physical and psychophysical characterization of a GE senographe DS clinical system
Author(s): Nico Lanconelli; Stefano Rivetti; Paola Golinelli; Raffaele Sansone; Marco Bertolini; Giovanni Borasi
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Paper Abstract

Indirect-conversion FFDM systems usually present a lower spatial resolution, with respect to the direct-conversion one. This can put serious issues in mammography, since high resolution is required. Digital software has been developed for restoring the losses in spatial resolution caused by blurring in the scintillation phosphor. GE Senographe DS system gives users the possibility of using such restoration. Basically, a filtering can be performed on the acquired images, by activating the FineView software option. In this work we present a complete characterization of a clinical system, in terms of MTF, NPS, DQE, and contrast-detail analysis. Figures of merit have been calculated on images acquired with and without the FineView software. The effects of the restoration software are investigated, both on image quality parameters, and on contrast-detail visibility. The MTF of the FFDM system is improved when FineView is activated. On the other hand, NPS presents noticeably changes, especially at high frequencies. DQE is fairly independent from the exposure, when FineView filter is not activated, whereas it presents a clear spread over the exposures, when FineView is activated. CDMAM analysis does not show significant differences between images with or without the restoration filter. Besides, the Mo/Mo beam seems to provide slightly better results than the Rh/Rh one.

Paper Details

Date Published: 15 March 2007
PDF: 9 pages
Proc. SPIE 6510, Medical Imaging 2007: Physics of Medical Imaging, 65104K (15 March 2007); doi: 10.1117/12.710025
Show Author Affiliations
Nico Lanconelli, Univ. of Bologna (Italy)
Stefano Rivetti, Azienda USL di Modena (Italy)
Paola Golinelli, Azienda USL di Modena (Italy)
Raffaele Sansone, Azienda USL di Modena (Italy)
Marco Bertolini, Arcispedale Santa Maria Nuova (Italy)
Giovanni Borasi, Arcispedale Santa Maria Nuova (Italy)

Published in SPIE Proceedings Vol. 6510:
Medical Imaging 2007: Physics of Medical Imaging
Jiang Hsieh; Michael J. Flynn, Editor(s)

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