Maximum-likelihood Estimation of 3D Event Position in Monolithic Scintillation Crystals: Experimental Results

S K Moore; W C J Hunter; L R Furenlid; H H Barrett

doi:10.1109/NSSMIC.2007.4436923

Maximum-likelihood Estimation of 3D Event Position in Monolithic Scintillation Crystals: Experimental Results

IEEE Nucl Sci Symp Conf Rec (1997). 2007:5:3691-3694. doi: 10.1109/NSSMIC.2007.4436923. Epub 2007 Oct 26.

Authors

S K Moore¹, W C J Hunter¹, L R Furenlid¹, H H Barrett¹

Affiliation

¹ Biomedical Engineering Program, the Department of Radiology and the College of Optical Sciences, University of Arizona, Tucson, AZ 85724 USA.

Abstract

We present a simple 3D event position-estimation method using raw list-mode acquisition and maximum-likelihood estimation in a modular gamma camera with a thick (25mm) monolithic scintillation crystal. This method involves measuring 2D calibration scans with a well-collimated 511 keV source and fitting each point to a simple depth-dependent light distribution model. Preliminary results show that angled collimated beams appear properly reconstructed.

Keywords: Depth of interaction (DOI); Emission tomography; PET; SPECT; gamma camera; gamma ray; maximum likelihood; monolithic scintillation crystal.

Grants and funding

P41 EB002035/EB/NIBIB NIH HHS/United States