Abstract
In any gamma-ray detector, each event produces electrical signals on one or more circuit elements. From these signals, we may wish to determine the presence of an interaction; whether multiple interactions occurred; the spatial coordinates in two or three dimensions of at least the primary interaction; or the total energy deposited in that interaction. We may also want to compute listmode probabilities for tomographic reconstruction. Maximum-likelihood methods provide a rigorous and in some senses optimal approach to extracting this information, and the associated Fisher information matrix provides a way of quantifying and optimizing the information conveyed by the detector. This paper will review the principles of likelihood methods as applied to gamma-ray detectors and illustrate their power with recent results from the Center for Gamma-ray Imaging.
Original language | English (US) |
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Article number | 5075989 |
Pages (from-to) | 725-735 |
Number of pages | 11 |
Journal | IEEE Transactions on Nuclear Science |
Volume | 56 |
Issue number | 3 |
DOIs | |
State | Published - Jun 1 2009 |
Keywords
- Depth of interaction
- Gamma-ray detectors
- Maximum-likelihood estimation
- Scintillation cameras
- Semiconductor arrays
ASJC Scopus subject areas
- Nuclear and High Energy Physics
- Nuclear Energy and Engineering
- Electrical and Electronic Engineering