For 3dvolreg, the file [
afni.nimh.nih.gov] contains some information on the methods used. Also, the paper
RW Cox and A Jesmanowicz.
Real-time 3D image registration for functional MRI.
Magnetic Resonance in Medicine, 42:1014-1018, 1999
[
afni.nimh.nih.gov]
describes in detail the algorithm used in 3dvolreg. As for AIR, you'll have to lookup Roger Wood's papers. Also, there have been a few papers published already comparing various registration software for FMRI - the one below is an example:
Ardekani, BA, Bachman, AH, and Helpern, JA, "A Quantitative Comparison of Motion Detection Algorithms in fMRI," Mag. Res. Imag., Vol. 19, No. 7, pp. 959-963, Sep. 2001.
bob cox
