Reference : Maximum-likelihood reconstruction with ordered subsets in bone SPECT
Scientific journals : Article
Human health sciences : Radiology, nuclear medicine & imaging
http://hdl.handle.net/2268/4903
Maximum-likelihood reconstruction with ordered subsets in bone SPECT
English
Blocklet, Didier mailto [Hôpital Erasme - Université Libre de Bruxelles - ULB > > Service des Radioisotopes > >]
Seret, Alain mailto [Hôpital Erasme - Université Libre de Bruxelles - ULB > > Service des Radioisotopes > >]
Popa, Niculaie [Hôpital Erasme - Université Libre de Bruxelles - ULB > > Service des Radioisotopes > >]
Schoutens, André [Hôpital Erasme - Université Libre de Bruxelles - ULB > > Service des Radioisotopes > >]
Dec-1999
Journal of Nuclear Medicine : Official Publication, Society of Nuclear Medicine
Society of Nuclear Medicine
40
12
1978-1984
Yes (verified by ORBi)
International
0161-5505
1535-5667
Reston
VA
[en] Bone SPECT ; Reconstruction ; Filtered backprojection ; Iterative ; MLEM ; OSEM
[en] This study was aimed at determining whether the ordered-subset expectation maximum (OSEM) is more effective than filtered backprojection (FBP) for bone SPECT in the routine clinical context. Methods. Fifty-seven consecutive bone SPECT studies were analyzed. They included pelvic and lumbar spine, thoraco lumbar spine, head and neck, feet and shoulders. A 64-projection SPECT study was acquired over 360° by single-head cameras 2–3h after the injection of 750 MBq 99mTc-methylene diphosphonate. Three observers compared the OSEM and FBP reconstructed images. Results. Streak artifacts, always present with FBP, were rarely generated with the OSEM. When present (n = 24), artifacts associated with negative values near hyperactivities in FBP were not generated with the OSEM in 67% of the cases (n = 16), permitting a satisfactory interpretation of these regions. In half of the other cases (17%, n = 4/24), interpretation was precluded. In only one case did the three observers agree that more hyperactivities were seen with the OSEM. Ninety-six percent of the OSEM pictures were superior or equal to FBP for anatomic resolution and were clearly better in 12% of the cases. The extent of the lesion with the OSEM seemed better or equally defined in 96% and clearly better in 14% of the cases. The low-activity regions were better or equally visualized in all cases and were clearly better seen in 23% of the cases. The quality of the pictures was found to be better or superior with the OSEM in 98% of the cases and definitely better in 65% of the cases. Conclusion: Replacement of FBP by the OSEM in bone SPECT would be beneficial to clinical practice.
Researchers ; Professionals ; Students
http://hdl.handle.net/2268/4903
http://jnm.snmjournals.org/cgi/content/abstract/40/12/1978?maxtoshow=&HITS=10&hits=10&RESULTFORMAT=&fulltext=Seret&searchid=1&FIRSTINDEX=0&sortspec=relevance&resourcetype=HWCIT
An article published in the Journal of Nuclear Medicine (JNM) is free and open to the public six months after its publication: http://jnm.snmjournals.org/

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