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Hippocampal Volume Measurements Using Magnetic Resonance Imaging in Normal Young Adults
Author(s) -
Honeycutt Nancy A.,
Smith Charles D.
Publication year - 1995
Publication title -
journal of neuroimaging
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.822
H-Index - 64
eISSN - 1552-6569
pISSN - 1051-2284
DOI - 10.1111/jon19955295
Subject(s) - hippocampal formation , magnetic resonance imaging , medicine , hippocampus , atrophy , nuclear medicine , pathology , radiology , anatomy
Volumetric analysis of brain magnetic resonance images (MRIs) measures structural changes associated with neurological and neuropsychiatnc disorders. Several studies investigated the hippocampus specifically, report1ng degrees of atrophy in such disorders. However, the range of normal hippocampal volumes must be known to assess atrophy. In tracings of T1 oblique slice and three‐dimensional MRis 1n 24 normal subjects reported here, the average volume of right and left hippocampus was 2.90 cm3 and 2.78 cm 3 , respectively. On paired analys1s, this difference was significant The literature Indicated these volumes are in the m1ddle of a wide range of hippocampal volumes (1.73–5.68 cml) 1n both MRI‐based and histology‐based studies. Th1s wide variation can be expla1ned by differing hippocampal boundary definitions; technical factors of image processing, segmentation, and display; sample heterogeneity; and interoperator differences.