Imitation learning for improved 3D PET/MR attenuation correction
Sign Up to like & getrecommendations! Published in 2021 at "Medical image analysis"
DOI: 10.1016/j.media.2021.102079
Abstract: The assessment of the quality of synthesised/pseudo Computed Tomography (pCT) images is commonly measured by an intensity-wise similarity between the ground truth CT and the pCT. However, when using the pCT as an attenuation map… read more here.
Keywords: pct; pet reconstruction; attenuation; error pct ... See more keywords
A PET reconstruction formulation that enforces non-negativity in projection space for bias reduction in Y-90 imaging.
Sign Up to like & getrecommendations! Published in 2018 at "Physics in medicine and biology"
DOI: 10.1088/1361-6560/aaa71b
Abstract: Most existing PET image reconstruction methods impose a nonnegativity constraint in the image domain that is natural physically, but can lead to biased reconstructions. This bias is particularly problematic for Y-90 PET because of the… read more here.
Keywords: reconstruction; pet reconstruction; reconstruction formulation; non negativity ... See more keywords
Evaluation of Parallel Level Sets and Bowsher’s Method as Segmentation-Free Anatomical Priors for Time-of-Flight PET Reconstruction
Sign Up to like & getrecommendations! Published in 2018 at "IEEE Transactions on Medical Imaging"
DOI: 10.1109/tmi.2017.2767940
Abstract: In this article, we evaluate Parallel Level Sets (PLS) and Bowsher’s method as segmentation-free anatomical priors for regularized brain positron emission tomography (PET) reconstruction. We derive the proximity operators for two PLS priors and use… read more here.
Keywords: pet reconstruction; parallel level; pet; anatomical priors ... See more keywords
PET Reconstruction of the Posterior Image Probability, Including Multimodal Images
Sign Up to like & getrecommendations! Published in 2019 at "IEEE Transactions on Medical Imaging"
DOI: 10.1109/tmi.2018.2886050
Abstract: In PET image reconstruction, it would be useful to obtain the entire posterior probability distribution of the image, because it allows for both estimating image intensity and assessing the uncertainty of the estimation, thus leading… read more here.
Keywords: reconstruction; reconstruction posterior; image; probability ... See more keywords
PET Reconstruction With Non-Negativity Constraint in Projection Space: Optimization Through Hypo-Convergence
Sign Up to like & getrecommendations! Published in 2020 at "IEEE Transactions on Medical Imaging"
DOI: 10.1109/tmi.2019.2920109
Abstract: Standard positron emission tomography (PET) reconstruction techniques are based on maximum-likelihood (ML) optimization methods, such as the maximum-likelihood expectation-maximization (MLEM) algorithm and its variations. Most methodologies rely on a positivity constraint on the activity distribution… read more here.
Keywords: optimization; convergence; hypo convergence; constraint ... See more keywords