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Abstract #4734

Mean diffusivity measurement in gray matter: a potential image-based biomarker of MCI and AD

Sung-han Lin 1 , Wen-Chiun Hsu 2,3 , Yao-Liang Chen 4 , and Jiun-Jie Wang 5,6

1 Graduate Institute of Clinical Medicine, Chang Gung University, Taoyuan County, Taiwan, 2 Department of Neurology, ChangGung Memorial Hospital, Linkou, Taoyuan County, Taiwan, 3 Dementia Center, Chang Gung Memorial Hospital, Linkou, Taoyuan County, Taiwan, 4 Department of Medical Imaging and Intervention, Chang Gung Memorial Hospital, Linkou, Taoyuan County, Taiwan, 5 Department of Medical Imaging and Radiological Sciences, Chang Gung University, Taoyuan County, Taiwan, 6 Neuroscience Research Center, Chang Gung Memorial Hospital, Linkou, Taoyuan County, Taiwan

The changes of mean diffusivity in cortical gray matter were compared among 121 participants, divided into three groups: healthy, mild cognitive impairment and Alzheimers disease. The percentage changes in frontal and temporal lobes between Alzheimers disease and healthy is approximately equal to that in Alzheimers disease with mild cognitive impairment and mild cognitive impairment with healthy. The involved regions of Alzheimers disease are overlapped with that by mild cognitive impairment and normal. Combining the changes and involved regions of mean diffusivity, it could be suggested that mild cognitive impairment is a transition stage between healthy and Alzheimers disease.

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