Fully 3-D List-Mode OSEM Accelerated by Graphics Processing Units
Molecular Imaging Program, Stanford, Stanford University, CA 94305 USA
IEEE Nuclear Science Symposium Conference Record, 2006
@inproceedings{pratx2006fully,
title={Fully 3-D list-mode OSEM accelerated by graphics processing units},
author={Pratx, G. and Chinn, G. and Habte, F. and Olcott, P. and Levin, C.},
booktitle={Nuclear Science Symposium Conference Record, 2006. IEEE},
volume={4},
pages={2196–2202},
year={2006},
organization={IEEE}
}
Advanced list-mode image reconstruction algorithms such as fully 3D list-mode ordered-subset expectation maximization (OSEM) are needed to exploit the potential performance of high-resolution PET systems with depth-of-interaction capabilities. However, such algorithms are computationally intensive. With the aim to accelerate list-mode 3D-OSEM, we investigated the use of graphics processing units (GPUs). Primarily designed to deliver high-definition graphics for video games in realtime, GPUs are now increasingly being used as cost-effective high-performance coprocessors for scientific computing. Parallelizable algorithms such as list-mode OSEM are drastically accelerated when the 24 programmable units of the GPU are used to carry the heaviest part of the computation: the line forward and backward projections.
July 31, 2011 by hgpu
