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A Novel Detection System Consisting of a Large-Area Sensor and a Multicell Si-Pad Array Operated in Spectroscopic Mode for X-Ray Breast Imaging

By D G Darambara, P J Sellin and G Maehlum

Abstract

<p>The ability of coherent X-ray scatter to provide the molecular structure of breast tissues could add a new dimension in X-ray breast imaging capable of tracking the molecular structural changes during disease progression and of improving the sensitivity to low-contrast lesions without increasing the radiation dose. Work is under way to build a laboratory prototype dual-sensor breast-imaging scanning system, which combines the diagnostic information from both the transmitted primary and the forward scattered X-rays. This required the design and development of a coherent X-ray scatter detection system based on a high-resistivity multielement two-dimensional (2-D) Si-pad array, a multichannel low-noise pulse processing front-end electronics chip, the XA1.3, and a new DAQ system. X-rays in the energy range of 17-45 keV can be detected with a FWHM energy resolution of 1-3 keV. Results on the characterization and optimization of the detector-readout electronics-DAQ system and its performance to measure diffraction signatures of most commonly used breast-equivalent materials of interest are presented.</p

Year: 2004
DOI identifier: 10.1109/TNS.2004.832578
OAI identifier: oai:epubs.surrey.ac.uk:1080

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