Guerra, P., Santos, A., Darambara, D. G. (2008) Development of a simplified simulation model for performance characterization of a pixellated CdZnTe multimodality imaging system. PHYSICS IN MEDICINE AND BIOLOGY, 53 (4). pp. 1099-1113. ISSN 0031-9155

Full text not available from this repository.

Abstract

Current requirements of molecular imaging lead to the complete integration of complementary modalities in a single hybrid imaging system to correlate function and structure. Among the various existing detector technologies, which can be implemented to integrate nuclear modalities ( PET and/ or singlephoton emission computed tomography with x- rays ( CT) and most probably with MR, pixellated wide bandgap room temperature semiconductor detectors, such as CdZnTe and/ or CdTe, are promising candidates. This paper deals with the development of a simplified simulation model for pixellated semiconductor radiation detectors, as a first step towards the performance characterization of a multimodality imaging system based on CdZnTe. In particular, this work presents a simple computational model, based on a 1D approximate solution of the Schockley - Ramo theorem, and its integration into the Geant4 application for tomographic emission ( GATE) platform in order to perform accurately and, therefore, improve the simulations of pixellated detectors in different configurations with a simultaneous cathode and anode pixel readout. The model presented here is successfully validated against an existing detailed finite element simulator, the multi- geometry simulation code, with respect to the charge induced at the anode, taking into consideration interpixel charge sharing and crosstalk, and to the detector charge induction efficiency. As a final point, the model provides estimated energy spectra and time resolution for Co-57 and F-18 sources obtained with the GATE code after the incorporation of the proposed model.

Item Type:	Article
Authors (ICR Faculty only):	Darambara, Dimitra
All Authors:	Guerra, P., Santos, A., Darambara, D. G.
Uncontrolled Keywords:	GAMMA-RAY DETECTORS; RADIATION DETECTORS; 3-DIMENSIONAL MODEL; CHARGE-TRANSPORT; GATE; PET; CDTE; SPECTROMETER; VALIDATION; RESOLUTION
Research teams:	ICR divisions > Radiotherapy and Imaging > Multimodality Molecular Imaging
Depositing User:	Users 13 not found.
Date Deposited:	18 Apr 2008 09:37
Last Modified:	10 Feb 2010 11:50
URI:	http://publications.icr.ac.uk/id/eprint/5945

Actions (login required)

View Item