¥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?)