Hi Wang > hi, > I want to analyse the algrithm of vbm.Who can send an article of the > algorithm. Regarding the segmentation/normalization used in VBM have a look at the last masterpiece ( ;-) ) from John Ashburner: the unified segmentation paper http://www.fil.ion.ucl.ac.uk/spm/doc/biblio/Keyword/SEGMENT.html From there you will get all you need I guess Cyril