StrainR values are 2x higher than StrainJ in general. As for acceptable values, keep in mind things like areal distortion/StrainJ are Log2 of the number. That means that +/-2 means 4 fold expansion or contraction. What is acceptable might vary from application to application. In general, one wants accurate alignment without severe distortions for a functional alignment (different from a folding alignment where one wants to constrain distortions so as to avoid overfitting folding patterns).
Matt. From: Moataz Assem <moataz.as...@mrc-cbu.cam.ac.uk> Date: Monday, May 27, 2019 at 8:48 PM To: "hcp-users@humanconnectome.org" <hcp-users@humanconnectome.org>, "Glasser, Matthew" <glass...@wustl.edu> Subject: Re: *WU-SPAM* [suspect][HCP-Users] assessing MSMAll quality Thanks Matt. and are acceptable ranges for values of those files less than 2 also? Moataz On Mon, May 27, 2019 at 5:47 AM +0100, "Glasser, Matthew" <glass...@wustl.edu<mailto:glass...@wustl.edu>> wrote: Hi Moataz, I check the StrainJ (isotropic areal distortion) and StrainR (shape distortion) and the overall alignment. Beyond that, there isn’t currently a quantitative way to do this. Matt. From: <hcp-users-boun...@humanconnectome.org> on behalf of Moataz Assem <moataz.as...@mrc-cbu.cam.ac.uk> Date: Sunday, May 26, 2019 at 10:03 AM To: "hcp-users@humanconnectome.org" <hcp-users@humanconnectome.org> Subject: *WU-SPAM* [suspect][HCP-Users] assessing MSMAll quality Hi, What are the recommended quality assessment steps for MSMAll? I currently check areal distortion maps (and make sure the values aren’t too large, e.g. more/less than 2/-2) and visually compare individual RSN and myelin maps to the atlas ones though this involves a bit of subjective judgment and doesn’t take into account subjects with genuine atypical topographies. Is there a more quantitative approach available? Thanks Moataz _______________________________________________ HCP-Users mailing list HCP-Users@humanconnectome.org http://lists.humanconnectome.org/mailman/listinfo/hcp-users _______________________________________________ HCP-Users mailing list HCP-Users@humanconnectome.org http://lists.humanconnectome.org/mailman/listinfo/hcp-users
