Dear Freesurfer,

I am concerned that I may not be processing the MEMPRAGE images to full take advantage of the T2* info in the multi-echos.

I have been separating each echo as 001.mgz, 002.mgz, 003.mgz & 004.mgz when using recon-all. This works well if motion exists in any of the individual echos.

However of late, I have noticed a that a reference was made to the problem of losing T2* info by differential scaling in the archive if a particular file format "memprage_echo0.mgz" was not used.

Here is the link to the archive note: http://www.mail-archive.com/freesurfer@nmr.mgh.harvard.edu/msg15303.html

It has been hard to identify a difference between our standard MPRAGE images and the MEMPRAGE images (we currently collect both on our Siemens 3T 32 channel system).

Am I processing the MEMPRAGE correctly?

Thanks!

--
<<•>>~<>~<<•>>~<>~<<•>>~<>~<<•>>~<>~<<•>>~<>~<<•>>~<>~<<•>>~<>~<<•>>

Carl M. Anderson, Ph.D. (mail stop 204)

Assistant Professor of Psychiatry,

Harvard Medical School &

The Neuroimaging Center,

McLean Hospital 115 Mill St. Belmont, MA 02478

Ph: 617-855-2972; Fax: 617-855-2770

e-mail: remfract@gmail.com; carl_anderson@hms.harvard.edu

<<•>>~<>~<<•>>~<>~<<•>>~<>~<<•>>~<>~<<•>>~<>~<<•>>~<>~<<•>>~<>~<<•>>