Matches in SemOpenAlex for { <https://semopenalex.org/work/W2505885677> ?p ?o ?g. }
Showing items 1 to 89 of
89
with 100 items per page.
- W2505885677 abstract "Computed tomography (CT) equivalent information is needed for attenuation correction in PET imaging and for dose planning in radiotherapy. Prior work has shown that Gaussian mixture models can be used to generate a substitute CT (s-CT) image from a specific set of MRI modalities. This work introduces a more flexible class of mixture models for s-CT generation, that incorporates spatial dependency in the data through a Markov random field prior on the latent field of class memberships associated with a mixture model. Furthermore, the mixture distributions are extended from Gaussian to normal inverse Gaussian (NIG), allowing heavier tails and skewness. The amount of data needed to train a model for s-CT generation is of the order of 100 million voxels. The computational efficiency of the parameter estimation and prediction methods are hence paramount, especially when spatial dependency is included in the models. A stochastic Expectation Maximization (EM) gradient algorithm is proposed in order to tackle this challenge. The advantages of the spatial model and NIG distributions are evaluated with a cross-validation study based on data from 14 patients. The study show that the proposed model enhances the predictive quality of the s-CT images by reducing the mean absolute error with 17.9%. Also, the distribution of CT values conditioned on the MR images are better explained by the proposed model as evaluated using continuous ranked probability scores." @default.
- W2505885677 created "2016-08-23" @default.
- W2505885677 creator A5001017767 @default.
- W2505885677 creator A5032786866 @default.
- W2505885677 creator A5048584953 @default.
- W2505885677 creator A5053535927 @default.
- W2505885677 creator A5054112077 @default.
- W2505885677 creator A5071699856 @default.
- W2505885677 creator A5072395055 @default.
- W2505885677 date "2018-10-01" @default.
- W2505885677 modified "2023-09-23" @default.
- W2505885677 title "Whole-brain subsitute CT generation using Markov random field mixture models" @default.
- W2505885677 hasPublicationYear "2018" @default.
- W2505885677 type Work @default.
- W2505885677 sameAs 2505885677 @default.
- W2505885677 citedByCount "0" @default.
- W2505885677 crossrefType "posted-content" @default.
- W2505885677 hasAuthorship W2505885677A5001017767 @default.
- W2505885677 hasAuthorship W2505885677A5032786866 @default.
- W2505885677 hasAuthorship W2505885677A5048584953 @default.
- W2505885677 hasAuthorship W2505885677A5053535927 @default.
- W2505885677 hasAuthorship W2505885677A5054112077 @default.
- W2505885677 hasAuthorship W2505885677A5071699856 @default.
- W2505885677 hasAuthorship W2505885677A5072395055 @default.
- W2505885677 hasConcept C105795698 @default.
- W2505885677 hasConcept C107673813 @default.
- W2505885677 hasConcept C11413529 @default.
- W2505885677 hasConcept C115961682 @default.
- W2505885677 hasConcept C121332964 @default.
- W2505885677 hasConcept C122342681 @default.
- W2505885677 hasConcept C124504099 @default.
- W2505885677 hasConcept C153180895 @default.
- W2505885677 hasConcept C154945302 @default.
- W2505885677 hasConcept C163716315 @default.
- W2505885677 hasConcept C177769412 @default.
- W2505885677 hasConcept C182081679 @default.
- W2505885677 hasConcept C2778045648 @default.
- W2505885677 hasConcept C33923547 @default.
- W2505885677 hasConcept C41008148 @default.
- W2505885677 hasConcept C49781872 @default.
- W2505885677 hasConcept C54170458 @default.
- W2505885677 hasConcept C61224824 @default.
- W2505885677 hasConcept C62520636 @default.
- W2505885677 hasConceptScore W2505885677C105795698 @default.
- W2505885677 hasConceptScore W2505885677C107673813 @default.
- W2505885677 hasConceptScore W2505885677C11413529 @default.
- W2505885677 hasConceptScore W2505885677C115961682 @default.
- W2505885677 hasConceptScore W2505885677C121332964 @default.
- W2505885677 hasConceptScore W2505885677C122342681 @default.
- W2505885677 hasConceptScore W2505885677C124504099 @default.
- W2505885677 hasConceptScore W2505885677C153180895 @default.
- W2505885677 hasConceptScore W2505885677C154945302 @default.
- W2505885677 hasConceptScore W2505885677C163716315 @default.
- W2505885677 hasConceptScore W2505885677C177769412 @default.
- W2505885677 hasConceptScore W2505885677C182081679 @default.
- W2505885677 hasConceptScore W2505885677C2778045648 @default.
- W2505885677 hasConceptScore W2505885677C33923547 @default.
- W2505885677 hasConceptScore W2505885677C41008148 @default.
- W2505885677 hasConceptScore W2505885677C49781872 @default.
- W2505885677 hasConceptScore W2505885677C54170458 @default.
- W2505885677 hasConceptScore W2505885677C61224824 @default.
- W2505885677 hasConceptScore W2505885677C62520636 @default.
- W2505885677 hasLocation W25058856771 @default.
- W2505885677 hasOpenAccess W2505885677 @default.
- W2505885677 hasPrimaryLocation W25058856771 @default.
- W2505885677 hasRelatedWork W1716278069 @default.
- W2505885677 hasRelatedWork W1816473710 @default.
- W2505885677 hasRelatedWork W1964237985 @default.
- W2505885677 hasRelatedWork W1965380641 @default.
- W2505885677 hasRelatedWork W2073008711 @default.
- W2505885677 hasRelatedWork W2091046854 @default.
- W2505885677 hasRelatedWork W2091115339 @default.
- W2505885677 hasRelatedWork W2115887459 @default.
- W2505885677 hasRelatedWork W2133946415 @default.
- W2505885677 hasRelatedWork W2151410539 @default.
- W2505885677 hasRelatedWork W2153480371 @default.
- W2505885677 hasRelatedWork W2156378435 @default.
- W2505885677 hasRelatedWork W2290554571 @default.
- W2505885677 hasRelatedWork W2544177979 @default.
- W2505885677 hasRelatedWork W2544764950 @default.
- W2505885677 hasRelatedWork W2544993917 @default.
- W2505885677 hasRelatedWork W2907257006 @default.
- W2505885677 hasRelatedWork W2981408934 @default.
- W2505885677 hasRelatedWork W3196770680 @default.
- W2505885677 hasRelatedWork W91971967 @default.
- W2505885677 isParatext "false" @default.
- W2505885677 isRetracted "false" @default.
- W2505885677 magId "2505885677" @default.
- W2505885677 workType "article" @default.