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. 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 …
Time-modified OSEM algorithm for more robust assessment of …
WebDec 12, 2024 · The PET data were acquired in a list-mode with a digital PET/CT scanner and reconstructed by ordered subset expectation maximization (OSEM) and the HYPER Iterative algorithm with seven penalization factors between 0.03 and 0.5 for acquisitions of 2 and 3 min per bed position (m/b), both including time-of-flight and point of spread function … WebImages were reconstructed with maximum-likelihood expectation maximization (MLEM) and with OSEM using 2-84 subsets. The reconstructions were repeated both with and … dictionary for math words
Ordered subset expectation maximization - Wikipedia
WebOrdered subset expectation maximization. In mathematical optimization, the ordered subset expectation maximization (OSEM) method is an iterative method that is used in … WebFeb 10, 2024 · Evaluate the quantitative, subjective (Deauville score [DS]) and reader agreement differences between standard ordered subset expectation maximization (OSEM) and Bayesian penalized likelihood (BPL) positron emission tomography (PET) reconstruction methods. A retrospective review of 104 F-18 fluorode … WebOct 26, 2007 · Ordered-subset expectation maximization (OS-EM) method is applied as the reconstruction framework. SIMIND Monte Carlo (MC) code is incorporated in the forward projection. Multiple projection sampling convolution-based forced detection (MP-CFD) is used here to accelerate the MC code. The convolution kernels in CFD are generated by the … dictionary format sample