Automatic segmentation of left and right cerebral hemispheres from MRI brain volumes using the graph cuts algorithm

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An automated algorithm has been developed to segment stripped (non-brain tissue excluded) T1-weighted MRI brain volumes into left and right cerebral hemispheres and cerebellum+brainstem. The algorithm, which uses theGraph Cutstechnique, performs a fully automated segmentation in approximately 30 s following pre-processing. It is robust and accurate and has been tested on datasets from two scanners using different field strengths and pulse sequences. We describe theGraph Cutsalgorithm and compare the results ofGraph Cutssegmentations against “gold standard” manual segmentations and segmentations produced by three popular software packages used by neuroimagers: BrainVisa, CLASP, and SurfRelax.

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