Comparing 3T and 1.5T MRI for Mapping Hippocampal Atrophy in the Alzheimer's Disease Neuroimaging Initiative ============================================================================================================ * N. Chow * K.S. Hwang * S. Hurtz * A.E. Green * J.H. Somme * P.M. Thompson * D.A. Elashoff * C.R. Jack * M. Weiner * L.G. Apostolova