WebConclusion: Our results would indicate that the uniformity requirements for SPECT are similar for FBP and OSEM reconstruction algorithms. Publication types Comparative Study MeSH terms Algorithms* Artifacts Humans Image Processing, Computer-Assisted / methods* Phantoms, Imaging Technetium Tomography, Emission-Computed, Single … WebReconstruct object from projection data. Parameters: tomo ( ndarray) – 3D tomographic data. theta ( array) – Projection angles in radian. center ( array, optional) – Location of rotation axis. sinogram_order ( bool, optional) – Determins whether data is a stack of sinograms (True, y-axis first axis) or a stack of radiographs (False ...
Noise-Weighted FBP Algorithm for Uniformly Attenuated SPECT …
WebSPECT Filtered Back-Projection FBP based on ideal Radon inversion formula assumes a linear, shift-invariant system and angular symmetry of projections SPECT imaging systems are neither angularly symmetric nor shift-invariant SPECT projection data affected by attenuation, scatter, and spatial WebAs a result, in most SPECT applications, the iterative ML-EM algorithm , instead of an FBP algorithm, is commonly used when attenuation compensation is required. Recently we developed noise-weighted FBP and Bayesian FBP algorithms for the Radon transform for parallel-beam, fan-beam, and cone-beam imaging geometries [ 21 ]–[ 25 ]. jean\\u0027s b9
tomopy.recon.algorithm — TomoPy ...
WebJul 1, 2016 · SPECT (A) and CT axial (B) images obtained with FBP CT (NI25; CTDI vol, 6.4 mGy; DLP, 276 mGy⋅cm; effective dose, 4.1 mSv). SPECT (C) and CT axial (D) images obtained with ASiR CT (NI40; CTDI vol, 2.5 mGy; DLP, 107 mGy⋅cm; effective dose, 1.6 mSv). Attenuation-Corrected SPECT Image Analysis WebAug 24, 2024 · In the early days of SPECT imaging, limitations on computing power, memory, and disk space left few options for reconstructing the tomographic slices. Filtered backprojection (FBP) reconstruction had … www.ncbi.nlm.nih.gov jean\u0027s b5