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Rapid Emission Tomography Reconstruction

Abstract

We present new implementations of the Maximum Likelihood Expectation Maximization (EM) algorithm and the related Ordered Subset EM (OSEM) algorithm. Our implementation is based on modern graphics hardware and achieves speedups of over eight times current software implementation, while reducing the RAM required to practical amounts for today?s PC?s. This is significant as it will make this algorithm practical for clinical use. In order to achieve a large speed up, we present bit splitting over different color channels as an accumulation strategy. We also present a novel hardware implementation for volume rendering emission data without loss of accuracy. Improved results are achieved through incorporation of attenuation correction with only a small speed penalty.

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Supplemental Material
Citation
Category
Paper in Conference Proceedings or in Workshop Proceedings (Full Paper in Proceedings)
Event Title
Eurographics/IEEE TVCG Workshop on Volume graphics
Divisions
Visualization and Data Analysis
Subjects
Computergraphik
Event Location
Tokyo, Japan
Event Type
Workshop
Event Dates
July 07 - 08
Date
July 2003
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