Dear SPM experts,
while reviewing the tensor-based morphometry literature, I've come across different approaches to preprocess the Jacobian determinants and grey matter (GM) images before statsitical analysis.
Some authors calculate (Jacobian-1)*GM, others calculate log(Jacobian) and proceed to stats without GM multiplication I've no difficulty understandig the log, but haven't been able to derive the rationale for the first formula. Also, wouldn't GM multiplication also be desirable in the log-case?
Thanks for any help in these basic questions
Regards
Eugenio
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