CERN Accelerating science

Article
Title	A Medipix2-based imaging system for digital mammography with silicon pixel detectors
Author(s)	Bisogni, M G ; Delogu, P ; Fantacci, M E ; Mettivier, G ; Montesi, M C ; Novelli, M ; Quattrocchi, M ; Rosso, V ; Russo, P ; Stefanini, A
Affiliation	(Dipartimento di Fisica, Pisa Univ, Italy)
Publication	2004
In:	50th IEEE 2003 Nuclear Science Symposium, Medical Imaging Conference, 13th International Workshop on Room Temperature Semiconductor Detectors and Symposium on Nuclear Power Systems, Portland, OR, USA, 19 - 25 Oct 2003, pp.1509-12 (Vol.3)
Subject category	Health Physics and Radiation Effects
Abstract	In this paper we present the first tests of a digital imaging system based on a silicon pixel detector bump-bonded to an integrated circuit operating in single photon counting mode. The X-rays sensor is a 300 mu m thick silicon, 14 by 14 mm/sup 2/, upon which a matrix of 256 * 256 pixels has been built. The read-out chip, named MEDIPIX2, has been developed at CERN within the MEDIPIX2 Collaboration and it is composed by a matrix of 256 * 256 cells, 55 * 55 mu m/sup 2/. The spatial resolution properties of the system have been assessed by measuring the square wave resolution function (SWRF) and first images of a standard mammographic phantom were acquired using a radiographic tube in the clinical irradiation condition. (5 refs).