PT - JOURNAL ARTICLE AU - R. Takahashi AU - K. Ishii AU - N. Miyamoto AU - T. Yoshikawa AU - K. Shimada AU - S. Ohkawa AU - T. Kakigi AU - K. Yokoyama TI - Measurement of Gray and White Matter Atrophy in Dementia with Lewy Bodies Using Diffeomorphic Anatomic Registration through Exponentiated Lie Algebra: A Comparison with Conventional Voxel-Based Morphometry AID - 10.3174/ajnr.A2200 DP - 2010 Nov 01 TA - American Journal of Neuroradiology PG - 1873--1878 VI - 31 IP - 10 4099 - http://www.ajnr.org/content/31/10/1873.short 4100 - http://www.ajnr.org/content/31/10/1873.full SO - Am. J. Neuroradiol.2010 Nov 01; 31 AB - BACKGROUND AND PURPOSE: DLB is recognized as the second major form of dementia in the elderly. The regional pattern of GM atrophy in DLB highly overlaps that in AD. The aim of this study was to identify the critical pattern of atrophy in DLB by using DARTEL, which provides improved registration accuracy compared with that of conventional VBM. MATERIALS AND METHODS: We evaluated 51 patients with probable AD, 43 patients with probable DLB, and 40 age-matched healthy controls. The pattern of GM atrophy in each group was compared by using conventional VBM and VBM-DARTEL. RESULTS: Regional patterns of atrophy identified by using conventional VBM differed significantly from those identified by using VBM-DARTEL. A decrease in GM volume in the MTLs in both AD and DLB was identified with VBM-DARTEL; the decrease was greater in patients with AD than in those with DLB. Comparisons with healthy controls revealed that the WM volume of the whole brain was preserved in patients with DLB. In contrast, a severe bilateral decrease in WM in the MTLs was detected in patients with AD. CONCLUSIONS: VBM-DARTEL provided more accurate results, and it enabled the identification of more localized morphologic alterations than did conventional VBM. Analysis of WM preservation in DLB could help to differentiate this condition from AD. ADAlzheimer diseaseDARTELDiffeomorphic Anatomical Registration Through Exponentiated Lie algebraDLBdementia with Lewy bodiesGMgray matterLtleftMMSEMini-Mental State ExaminationMTLmedial temporal lobeRtrightSEspin-echoSPGRspoiled gradient-recalledVBMvoxel-based morphometryWMwhite matter