Just for information:

Handbook of Imaging the Alzheimer Brain
Editors: J.W. Ashford, A. Rosen, M. Adamson, P. Bayley,  
O. Sabri, A. Furst, S.E. Black and M. Weiner  
July 2011, 824 pp., hardcover 
ISBN 978-1-60750-792-5 (print) 

The chapter that describes the usage of FreeSurfer in AD is "Automated Volumetric Methods to Detect Alzheimer's Disease" / Pedro Paulo de Magalhães Oliveira Jr. et al.