期刊
MEDICAL IMAGE ANALYSIS
卷 6, 期 2, 页码 77-92出版社
ELSEVIER
DOI: 10.1016/S1361-8415(02)00052-X
关键词
neural networks; cortical sulci; folding patterns; automatic recognition system
This paper describes a complete system allowing automatic recognition of the main sulci of the human cortex. This system relies on a preprocessing of magnetic resonance images leading to abstract structural representations of the cortical folding patterns. The representation nodes are cortical folds, which are given a sulcus name by a contextual pattern recognition method. This method can be interpreted as a graph matching approach, which is driven by the minimization of a global function made up of local potentials. Each potential is a measure of the likelihood of the labelling of a restricted area. This potential is given by a multi-layer perceptron trained on a learning database. A base of 26 brains manually labelled by a neuroanatomist is used to validate our approach. The whole system developed for the right hemisphere is made up of 265 neural networks. The mean recognition rate is 86% for the learning base and 76% for a generalization base, which is very satisfying considering the current weak understanding of the variability of the cortical folding patterns. (C) 2002 Elsevier Science B.V. All rights reserved.
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