Jérémy Lecoeur

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Graph Cuts have been shown as a powerful interactive segmentation technique in several medical domains. We propose to automate the Graph Cuts in order to automatically segment Multiple Sclerosis (MS) lesions in MRI. We replace the manual interaction with a robust EM-based approach in order to discriminate between MS lesions and the Normal Appearing Brain(More)
We present a new tool for segmenting multiple sclerosis le-sions that can take advantage of the complementary modalities we usually use for this purpose. Based on the integration of multi channel information in a scale-space paradigm, its optimization by graph cuts provides a powerful and accurate tool. After presenting the mathematical and physical(More)
We present an optimized supervised segmentation method from multispectral MRIs. As MR images do not behave as natural images , using a spectral gradient based on a psycho-visual paradigm is sub-optimal. Therefore, we propose to create an optimized spectral gradient using multi-modalities MRIs. To that purpose, the algorithm learns the optimized parameters(More)
BACKGROUND Advances in white matter tractography enhance neurosurgical planning and glioma resection, but white matter tractography is limited by biological variables such as edema, mass effect, and tract infiltration or selection biases related to regions of interest or fractional anisotropy values. OBJECTIVE To provide an automated tract identification(More)
In this paper, we present a paradigm for alleviating the challenge of fiber tracking through edematous brain regions. This new framework of fiber tracking is applied to the brain tumor datasets 1, 2 and 3 provided as part of the 3 rd MICCAI DTI Tractography Challenge. Although the data was single shell, b = 1000s/mm 2 , we were able to successfully fit a(More)
Otologic surgery is performed for a variety of reasons including treatment of recurrent ear infections, alleviation of dizziness, and restoration of hearing loss. A typical ear surgery consists of a tympanomastoidectomy in which both the middle ear is explored via a tympanic membrane flap and the bone behind the ear is removed via mastoidectomy to treat(More)