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I'm curious if there are options to decrease computation time, even at the expense of quality?
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Hey,
Not really reducing the computation time, but if you have enough ram and a good processor, you can run it in parallel. I have a mac with 6 Core Intel Xeon processor and 64 GB RAM. I can run up to 10 iterations on parallel and it works fine without issues.
Kind regards
Mageshwar Selvakumar, M.Sc
Department of Pharmakologische Bildgebung und Bildanalyse
Friedrich Alexander Universität Erlangen Nürnberg
Office: Fahrstr. 17, 91054 Erlangen
Phone: + 49-9131-8522898
________________________________ From: freesurfer-bounces@nmr.mgh.harvard.edu freesurfer-bounces@nmr.mgh.harvard.edu on behalf of Gregory Book gregory.a.book@gmail.com Sent: Wednesday, October 31, 2018 2:58 PM To: freesurfer Subject: [Freesurfer] Options to decrease computation time
External Email - Use Caution
I'm curious if there are options to decrease computation time, even at the expense of quality?
Hi Gregory
I guess, although we don't recommend it. You could use expert opts to do this (increase the tolerance in the mri_ca_register step for example would decrease it). Many of the steps take a -tol <tolerance> switch that can be used to terminate the numerical minimization earlier.
You can alwo run with -openmp <nthreads> on multicore machines and get pretty significant speed increases without sacrificing accuracy. cheers Bruce
On Wed, 31 Oct 2018, Gregory Book wrote:
External Email - Use Caution
I'm curious if there are options to decrease computation time, even at the expense of quality?
freesurfer@nmr.mgh.harvard.edu
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Bruce Fischl -
Gregory Book -
Mageshwar Selvakumar