Segmenting Multiple Sclerosis Lesions Using a Spatially Constrained K-Nearest Neighbour Approach
Publikation: Bidrag til bog/antologi/rapport › Konferencebidrag i proceedings › Forskning › fagfællebedømt
We propose a method for the segmentation of Multiple Sclerosis lesions. The method is based on probability maps derived from a K-Nearest Neighbours classification. These are used as a non parametric likelihood in a Bayesian formulation with a prior that assumes connectivity of neighbouring voxels. The formulation is solved using the method of Iterated Conditional Modes (ICM). The parameters of the method are found through leave-one-out cross validation on training data after which it is evaluated on previously unseen test data. The multi modal features investigated are 3 structural MRI modalities, the diffusion MRI measures of Fractional Anisotropy (FA), Mean Diffusivity (MD) and several spatial features. Results show a benefit from the inclusion of diffusion primarily to the most difficult cases. Results shows that combining probabilistic K-Nearest Neighbour with a Markov Random Field formulation leads to a slight improvement of segmentations.
Originalsprog | Engelsk |
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Titel | ICIAR'12 Proceedings of the 9th international conference on Image Analysis and Recognition - Volume Part II |
Redaktører | Aurélio Campilho, Mohamed Kamel |
Antal sider | 8 |
Vol/bind | 2 |
Publikationsdato | 2012 |
Sider | 156-163 |
ISBN (Trykt) | 978-3-642-31297-7 |
ISBN (Elektronisk) | 978-3-642-31297-7 |
DOI | |
Status | Udgivet - 2012 |
ID: 48584336