You should not need to increase the the number of iterations. Most of the problems with the hi-res stream was due to the extra vertices. The new stream decimates the mesh down to the number of vertices that would have been in a 1mm scan.

On 7/28/2020 8:37 PM, Salvatore Torrisi wrote:

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Hi there FS gurus-

We have fairly standard 7T structural data (0.7mm iso) and are using the -hires flag for recon-all. Per the old-ish page "Recon with native submillimeter resolution" we've also been using a higher mris_inflate value in an expert options file, which seemed to help some with FS6. However, we're not sure if this is still recommended with FreeSurfer 7.1. Is it? The recent release notes indicate "better" surface reconstruction but it's not clear in what way(s). Any tips on other expert options to test *with 7.1* for even further improvements would also be greatly appreciated (assuming MPRAGE or MP2RAGE T1s). Thanks in advance!

-Salvatore (Sam) Torrisi

Advanced MRI Technologies, LLC Helen Wills Neuroscience Institute University of California, Berkeley

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