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Please use this identifier to cite or link to this item: http://hdl.handle.net/10261/15973
Title: Depth of interaction detection for gamma-ray imaging
Authors: Lerche, Christoph W.; Döring, Michael; Ros García, Ana; Herrero Bosch, Vicente; Gadea, R.; Aliaga Varea, Ramón José; Colom, Ricardo; Mateo, F.; Monzó Ferrer, José María; Ferrando, N.; Toledo, J. F.; Martínez, J. D.; Sebastiá, Ángel; Sánchez Martínez, Filomeno; Benlloch Baviera, José María
Keywords: Depth of interaction detection
γ-Ray imaging
Center of gravity algorithm
Issue Date: 25-Dec-2008
Publisher: Elsevier
Citation: Nuclear Instruments and Methods in Physics Research A 600: 624–634 (2009)
Abstract: A novel design for an inexpensive depth of interaction capable detector for gamma-ray imaging has been developed. The design takes advantage of the strong correlation between the width of the scintillation light distribution in monolithic crystals and the interaction depth of gamma-rays. We present in this work an inexpensive modification of the commonly used charge dividing circuits which enables the instantaneous and simultaneous computation of the second order moment of light distribution. This measure provides a good estimate for the depth of interaction and does not affect the determination of the position centroids and the energy release of gamma-ray impact. The method has been tested with a detector consisting of a monolithic LSO block sized 42 x 42 x 10 mm(3) and a position-sensitive photomultiplier tube H8500 from Hamamatsu. The mean spatial resolution of the detector was found to be 3.4 mm for the position centroids and 4.9 mm for the DOI. The best spatial resolutions were observed at the center of the detector and yielded 1.4 mm for the position centroids and 1.9 mm for the DOI. (C) 2008 Elsevier B.V. All rights reserved.
Publisher version (URL): hhtp://dx.doi.org/10.1016/j.nima.2008.11.151
URI: http://hdl.handle.net/10261/15973
ISSN: 0168-9002
DOI: 10.1016/j.nima.2008.11.151
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