@inproceedings{5d50bdaeb6264206813091b48040ff49,
title = "Effective emission tomography image reconstruction algorithms for SPECT data",
abstract = "Medical image reconstruction from projections is computationally intensive task that demands solutions for reducing the processing delay in clinical diagnosis applications. This paper analyzes reconstruction methods combined with pre- and post-filtering for Single Photon Emission Computed Tomography (SPECT) in terms of convergence speed and image quality. The evaluation is performed by means of an image database taken from a concurrent study investigating the use of SPECT as a diagnostic tool for the early onset of Alzheimer-type dementia. Filtered backprojection (FBP) methods combined with frequency sampling 2D pre- and post-filtering provides a good trade-off between image quality and delay. Maximum likelihood expectation maximization (ML-EM) improves the quality of the reconstructed image but with a considerable increase in processing delay. To overcome this problem the ordered subsets expectation maximization (OS-EM) method is found to be an effective algorithm for reducing the computational cost with an image quality similar to ML-EM.",
author = "J. Ram{\'i}rez and G{\'o}rriz, {J. M.} and M. G{\'o}mez-R{\'i}o and A. Romero and R. Chaves and A. Lassl and A. Rodr{\'i}guez and Puntonet, {C. G.} and F. Theis and E. Lang",
year = "2008",
doi = "10.1007/978-3-540-69384-0_79",
language = "English",
isbn = "3540693831",
series = "Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics)",
number = "PART 1",
pages = "741--748",
booktitle = "Computational Science - ICCS 2008 - 8th International Conference, Proceedings",
edition = "PART 1",
note = "8th International Conference on Computational Science, ICCS 2008 ; Conference date: 23-06-2008 Through 25-06-2008",
}