Automatic construction of an attributed relational graph representing the cortex topography using homotopic transformations

Jean-Francois Mangin; Vincent Frouin; Isabelle Bloch; Jean Regis; Jaime Lopez-Krahe

doi:10.1117/12.179275

8 July 1994 Automatic construction of an attributed relational graph representing the cortex topography using homotopic transformations

Jean-Francois Mangin, Vincent Frouin, Isabelle Bloch, Jean Regis, Jaime Lopez-Krahe

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Proceedings Volume 2299, Mathematical Methods in Medical Imaging III; (1994) https://doi.org/10.1117/12.179275
Event: SPIE's 1994 International Symposium on Optics, Imaging, and Instrumentation, 1994, San Diego, CA, United States

Abstract

We propose an algorithm allowing the construction of a high level representation of the cortical topography from a T1-weighted 3D MR image. This representation is an attributed relational graph (ARG) inferred from the 3D skeleton of the object made up of the union of gray matter and cerebro-spinal fluid enclosed in the brain hull. In order to increase the robustness of the skeletonization, topological and regularization constraints are included in the segmentation process using an original method: the homotopically deformable regions. This method is halfway between deformable contour and Markovian segmentation approaches. The 3D skeleton is segmented in simple surfaces (SSs) constituting the ARG nodes (mainly sulcus parts). The ARG relations are of two types: first, the SSs pairs connected in the skeleton; second, the SSs pairs delimiting a gyrus. The described algorithm has been developed in the frame of a project aiming at the automatic detection and recognition of the main cortical sulci. Indeed, the ARG is a synthetic representation of all the information required by the sulcus identification. This project will contribute to the development of new methodologies for the human brain functional mapping.

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Jean-Francois Mangin, Vincent Frouin, Isabelle Bloch, Jean Regis, and Jaime Lopez-Krahe "Automatic construction of an attributed relational graph representing the cortex topography using homotopic transformations", Proc. SPIE 2299, Mathematical Methods in Medical Imaging III, (8 July 1994); https://doi.org/10.1117/12.179275

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