Gérard Subsol

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The study of temporal series of medical images can be helpful for physicians to perform pertinent diagnoses and to help them in the follow-up of a patient: in some diseases, lesions, tumors or anatomical structures vary over time in size, position, composition, etc., either because of a natural pathological process or under the effect of a drug or a(More)
We present a general scheme for automatically building a morphometric anatomical atlas. We detail each stage of the method, including the non-rigid registration algorithm, three-dimensional line averaging and statistical processes. We apply the method to obtain a quantitative atlas of skull crest lines. Finally, we use the resulting atlas to study a(More)
3D MR data obtained for 10 healthy control subjects have been used to build a brain atlas. The atlas is built in four stages. First, a set of features that are unambiguously definable and anatomically relevant need to be computed for each item in the database. The chosen features are crest lines along which the maximal principal curvature of the surface of(More)
In this research report, we present a general scheme for building entirely automatically a morphometric anatomical atlas from 3D medical images (CT-Scan, Magnetic Resonance Imagery). We detail each step of the method, including the non-rigid registration algorithm, 3D feature lines averaging, and statistical processes. We apply the method to obtain a(More)
In this report, we present a new method of aligning histological sections. First a displacement eld between the two images is computed by block matching. Then we estimate a rigid transformation based on the eld. The process is integrated within a multi-scale scheme. We carefully study the problem of robustness and we propose several ideas to deal with(More)
This paper deals with the difficult task of recognition of a large vocabulary of proper names in a directory assistance application. Rather than augmenting the lexicon with alternate pronunciations. which is unsuitable for very large vocabularies of proper names, a class of distortions of the canonical form is used as knowledge source (KS) for a new(More)
In this paper, the authors present an original method for the automated recognition of tree-ring limits in X-Ray Computed Tomography images of wood. The method is based on two steps: tree-ring tagging, and tree-ring delineation. The first step is performed by analyzing the radial intensity profiles after locating automatically the pith, and the second step(More)
Two facial models corresponding to two deceased subjects have been manually created and the two corresponding skulls have been dissected and skeletonized. These pairs of skull/ facial data have been scanned with a CT scanner, and the computed geometric three-dimensional models of both skulls and facial tissue have been built. One set of skull/facial data(More)
This paper describes a method to automatically generate the mapping between a completely labeled reference image and the 3D medical image of a patient. To a c hieve this, we combined three techniques: the extraction of 3D feature lines, their matching using 3D deformable line models, the extension of the deformation to the whole image space using warping(More)