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LROC analysis of detector-response compensation in SPECT

, : LROC analysis of detector-response compensation in SPECT. IEEE Transactions on Medical Imaging 19(5): 463-473

Localization ROC (LROC) observer studies examined whether detector response compensation (DRC) in ordered-subset, expectation-maximization (OSEM) reconstructions helps in the detection and localization of hot tumors. Simulated gallium (Ga-67) images of the thoracic region were used in the study. The projection data modeled the acquisition of attenuated 93- and 185-keV photons with a medium-energy parallel-hole collimator, but scatter was not modeled. Images were reconstructed with five strategies: 1) OSEM with no DRC; 2) OSEM preceded by restoration filtering; 3) OSEM with iterative DRC; 4) OSEM with an ideal DRC; and 5) filtered backprojection (FBP) with no DRC. All strategies included attenuation correction. There were four LROC studies conducted. In a study using a single tumor activity, the ideal DRC offered the best performance, followed by iterative DRC, restoration filtering, OSEM with no DRC, and FBP. Statistical significance at the 5% level was found between all pairs of strategies except for restoration filtering and OSEM with no DRC. A similar ranking was found for a more realistic study using multiple tumor activities. Additional studies considered the effects of OSEM iteration number and tumor activity on the detection improvement that iterative DRC offered with respect to OSEM with no DRC.


PMID: 11021689

DOI: 10.1109/42.870256

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Clemens, R., 2007: After the ban: the Japanese market for U.S. beef. In the months following the reopening of the Japanese market to imports of U.S. beef on July 26, 2006, Japanese importers were unable to procure adequate supplies. This paper discusses reasons for early supply shortages and some of the policy and...

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Paclt, Jiri, 1951: Fungus and related diseases of the genus Catalpa. A list of 93 fungi reported on Catalpa. including Myxomycetes, Phycomycetes, Ascomycetes, Basidiomycetes, and Fungi Imperfecti, including Septoria macrocatalpae on C. longissima, West Indies. Notes are given on virus and bacterial diseases and tho...

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