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(Radiology. 2000;216:291-297.)
© RSNA, 2000

Technical Developments

Mesial Temporal Sclerosis and Temporal Lobe Epilepsy: MR Imaging Deformation-based Segmentation of the Hippocampus in Five Patients1

Robert E. Hogan, MD, Kevin E. Mark, DSc, Lei Wang, PhD, Sarang Joshi, PhD, Michael I. Miller, PhD and Richard D. Bucholz, MD

1 From the Department of Neurology (R.E.H.) and the Division of Neurosurgery (R.D.B.), Saint Louis University, 3635 Vista Ave, St Louis, MO 63110; IntellX, Broomfield, Colo (K.E.M., S.J., R.D.B.); the Department of Psychiatry, Washington University School of Medicine, St Louis, Mo (L.W.); and the Center for Imaging Science, Whiting School of Engineering, Johns Hopkins University, Baltimore, Md (M.I.M.). Received May 17, 1999; revision requested July 19; final revision received October 12; accepted October 26. Address correspondence to R.E.H. (e-mail: hoganr2@slu.edu).

In five patients with mesial temporal sclerosis, the authors verified the precision and reproducibility of hippocampal segmentations with deformation-based magnetic resonance (MR) imaging. The overall percentage overlap between automated segmentations was 92.8% (SD, 3.5%), between manual segmentations was 73.1% (SD, 9.5%), and between automated and manual segmentations was 74.8% (SD, 10.3%). Deformation-based hippocampal segmentations provided a precise method of hippocampal volume measurement in this patient population.

Index terms: Brain, volume, 1341.839 • Epilepsy • Hippocampus, 1341.92 • Magnetic resonance (MR), image processing, 1341.121412 • Magnetic resonance (MR), volume measurement, 1341.12141 • Schizophrenia




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