MRI examination of PART versus AD Lead Investigator: Tiago Oliveira Institution : Universidade do Minho E-Mail : tiagogiloliveira@gmail.com Proposal ID : 1412 Proposal Description: Aim 1 - to compare the in vivo brain MRI findings with neuropathological findings at time of autopsy for patients with Aim 2 - to confirm the in vivo brain MRI findings with neuropathological findings at time of autopsy for patients with AD Aim 3 - to compare the MRI findings between patients with PART ( Aim 4 - to assess which neuropathological domains are specifically correlated with atrophy in the affected brain regions of the aforementioned groups.