Rapid emission tomography reconstruction
- 7 July 2003
- proceedings article
- Published by Association for Computing Machinery (ACM)
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.Keywords
This publication has 11 references indexed in Scilit:
- Unmatched projector/backprojector pairs in an iterative reconstruction algorithmIEEE Transactions on Medical Imaging, 2000
- Rapid 3-D cone-beam reconstruction with the simultaneous algebraic reconstruction technique (SART) using 2-D texture mapping hardwareIEEE Transactions on Medical Imaging, 2000
- Optical models for direct volume renderingIEEE Transactions on Visualization and Computer Graphics, 1995
- Quantitative cardiac SPECT reconstruction with reduced image degradation due to patient anatomyIEEE Transactions on Nuclear Science, 1994
- Accelerated volume rendering and tomographic reconstruction using texture mapping hardwarePublished by Association for Computing Machinery (ACM) ,1994
- Accelerated image reconstruction using ordered subsets of projection dataIEEE Transactions on Medical Imaging, 1994
- Footprint evaluation for volume renderingPublished by Association for Computing Machinery (ACM) ,1990
- A rendering algorithm for visualizing 3D scalar fieldsACM SIGGRAPH Computer Graphics, 1988
- Positron emission tomographic images and expectation maximization: a VLSI architecture for multiple iterations per secondIEEE Transactions on Nuclear Science, 1988
- Maximum Likelihood Reconstruction for Emission TomographyIEEE Transactions on Medical Imaging, 1982