WebNational Center for Biotechnology Information WebApr 12, 2024 · Sensitivity was comparable between the MUS method and the conventional method (ordered subset expectation maximization; OSEM) (51% vs 54%, respectively; (p = 0.366), specificity was significantly higher using the MUS method (87% vs 77%, respectively; p < 0.05), and diagnostic performance was higher using the MUS method (area under …
(PDF) Characterization of ordered-subsets expectation …
WebJul 4, 2024 · PET sections were obtained by an iterative reconstruction algorithm (ordered subset expectation maximization (OSEM)) and corrected for attenuation by the corresponding CT attenuation maps. Maximum intensity projection (MIP) images and reconstructed sections (low-dose CT, attenuation corrected PET, and fused PET/CT) were … Webas ordered-subsets expectation maximization (OSEM) are widely used to accelerate iterative image reconstruction (2– 8). Here, the projection data are divided into subsets that are operated on sequentially during each OSEM iteration. The number of subsets provides the approximate accelera-tion factor—one iteration of OSEM with N subsets provides fiche porte bois
National Center for Biotechnology Information
WebDec 27, 2024 · In ordered subsets expectation maximization (OSEM) reconstruction of electrocardiography (ECG)-gated myocardial perfusion single-photon emission computed tomography (SPECT), it is often assumed that the image acquisition time is constant for each projection angle and ECG bin. WebAbstract Purpose of the study: To establish the most appropriate ordered subset expectation maximization (OSEM) parameters for image reconstruction in Tc-99m … Webon ordered-subset expectation maximization (OSEM) have become the dominant iterative reconstruction procedures in SPECT and PET. The performance of OSEM was com-pared with that of filtered backprojection (FBP) in several experimental and clinical studies ( 1–5); OSEMwasshownto have better noise properties and higher image contrast and fiche porter secours