Maximum likelihood reconstruction for pinhole SPECT with a displaced center-of-rotation
Journal Article
·
· IEEE Transactions on Medical Imaging
OSTI ID:79438
- Duke Univ. Medical Center, Durham, NC (United States). Dept. of Radiology
In this paper, the authors describe the implementation of a maximum likelihood (ML), algorithm using expectation maximization (EM) for pin-hole SPECT with a displaced center-of-rotation. A ray-tracing technique is used in implementing the ML-EM algorithm. The proposed ML-EM algorithm is able to correct the center of rotation displacement which can be characterized by two orthogonal components. The algorithm is tested using experimentally acquired data, and the results demonstrate that the pinhole ML-EM algorithm is able to correct artifacts associated with the center-of-rotation displacement.
- DOE Contract Number:
- FG05-89ER60894
- OSTI ID:
- 79438
- Journal Information:
- IEEE Transactions on Medical Imaging, Journal Name: IEEE Transactions on Medical Imaging Journal Issue: 2 Vol. 14; ISSN 0278-0062; ISSN ITMID4
- Country of Publication:
- United States
- Language:
- English
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