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Proceedings Paper

Validation of voxel-based morphometry (VBM) based on MRI
Author(s): Xueyu Yang; Kewei Chen; Xiaojuan Guo; Li Yao
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Paper Abstract

Voxel-based morphometry (VBM) is an automated and objective image analysis technique for detecting differences in regional concentration or volume of brain tissue composition based on structural magnetic resonance (MR) images. VBM has been used widely to evaluate brain morphometric differences between different populations, but there isn't an evaluation system for its validation until now. In this study, a quantitative and objective evaluation system was established in order to assess VBM performance. We recruited twenty normal volunteers (10 males and 10 females, age range 20-26 years, mean age 22.6 years). Firstly, several focal lesions (hippocampus, frontal lobe, anterior cingulate, back of hippocampus, back of anterior cingulate) were simulated in selected brain regions using real MRI data. Secondly, optimized VBM was performed to detect structural differences between groups. Thirdly, one-way ANOVA and post-hoc test were used to assess the accuracy and sensitivity of VBM analysis. The results revealed that VBM was a good detective tool in majority of brain regions, even in controversial brain region such as hippocampus in VBM study. Generally speaking, much more severity of focal lesion was, better VBM performance was. However size of focal lesion had little effects on VBM analysis.

Paper Details

Date Published: 5 March 2007
PDF: 8 pages
Proc. SPIE 6512, Medical Imaging 2007: Image Processing, 65121G (5 March 2007); doi: 10.1117/12.709047
Show Author Affiliations
Xueyu Yang, Beijing Normal Univ. (China)
Kewei Chen, Banner Good Samaritan Regional Medical Ctr. (United States)
Xiaojuan Guo, Beijing Normal Univ. (China)
Li Yao, Beijing Normal Univ. (China)

Published in SPIE Proceedings Vol. 6512:
Medical Imaging 2007: Image Processing
Josien P. W. Pluim; Joseph M. Reinhardt, Editor(s)

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