Evaluation of charge -sharing effects on the spatial resolution of the PICASSO detector

被引：4

作者：

Rigon, L. ^{[1
]}

Arfelli, F. ^{[1
,2
]}

Bergamaschi, A. ^{[3
]}

Chen, R. C. ^{[1
,4
]}

Dreossi, D. ^{[1
,5
]}

Longo, R. ^{[1
,2
]}

Menk, R. -H. ^{[5
]}

Schmitt, B. ^{[3
]}

Vallazza, E. ^{[1
]}

Castelli, E. ^{[1
,2
]}

机构：

[1] Ist Nazl Fis Nucl, Sez Trieste, I-34127 Trieste, Italy

[2] Univ Trieste, Dipartimento Fis, I-34127 Trieste, Italy

[3] Paul Scherrer Inst, CH-5232 Villigen, Switzerland

[4] Chinese Acad Sci, Shanghai Inst Appl Phys, Shanghai 201800, Peoples R China

[5] Sincrotrone Trieste SCpA, I-34012 Basovizza, TS, Italy

来源：

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT | 2010年 / 617卷 / 1-3期

关键词：

Silicon microstrip; Photon counting; Digital mammography; Synchrotron radiation; Charge sharing; SYNCHROTRON-RADIATION; CLINICAL MAMMOGRAPHY;

D O I：

10.1016/j.nima.2009.09.007

中图分类号：

TH7 [仪器、仪表];

学科分类号：

0804 ; 080401 ; 081102 ;

摘要：

A double -layer "edge-on" silicon microstrip detector has been designed and realized in the frame of the PICASSO (Phase Imaging for Clinical Application with Silicon detector and Synchrotron radiatiOn) project at the SYRMEP (SYnchrotron Radiation for MEdical Physics) beamline of Elettra (Trieste, Italy). The detector meets the requirements for synchrotron radiation mammography with patients inregarding: (a) size, since it covers the full beam width (210 mm); (b) spatial resolution, determined by the 0.05 mm strip pitch; (c) single-photon counting capabilities, because it is able to handle more than 106 photons/(pixel x s); (d) contrast resolution, thanks to a threshold trim DAC that equalizes the channel sensitivity; (e) efficiency, due to the high absorption in the 15-20 mm sensor depth. Experimental measurements evidence charge sharing, though not compromising the spatial resolution. (C) 2009 Elsevier By. All rights reserved.

引用

页码：244 / 245

页数：2

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