-7-
¥Intra-subject, inter-session registration (for multi-day studies
on same subject)
²Longitudinal or learning studies;
re-use of cortical surface models
²Transformation between sessions is
calculated by registering high-resolution anatomicals from each session
åto3d defines defines relationship
between EPI and SPGR in each session
å3dvolreg computes relationship between
sessions
åSo can transform EPI from session 2 to
orientation of session 1
²Issues in inter-session
registration:
åSubjectÕs head will be
positioned differently (in orientation and location)
íxyz-coordinates and anatomy
donÕt correspond
åAnatomical coverage of EPI
slices will differ between sessions
åGeometrical relation between
EPI and SPGR differs between session
åSlice thickness may vary
between sessions (try not to do this, OK?)