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Two Algorithms for Use with an Orthogonal-View Coded-Aperture System

Arizona Health Sciences Center, Tucson, Arizona

Correspondence: For reprints contact: R. G. Paxman, Dept. of Radiology, Div. of Nucl. Med., Arizona Health Sciences Center, Tucson, AZ 85724.

ABSTRACT

The goal of single photon emission computerized tomography is to map out a three-dimensional distribution of a radionuclide that is concentrated in a structure of interest. There are a number of imaging modalities that achieve this goal with varying degrees of success. In this study, computer simulation is used to explore a novel imaging modality, orthogonal-view coded-aperture imaging. Furthermore, a comparison is made between two reconstruction algorithms, one being an iterative back-projection algorithm and the other a Monte Carlo algorithm. Finally, evidence is presented suggesting that a deficiency in the projection data due to multiplexing is less disturbing than that due to limited angular range.