Dear Kathleen,
you can try to change the skull-stripping method to the gcut method. In the newest CAT12 release the options for skulls-tripping are limited to the SPM and gcut-approach. However, in older version or the cat12 expert mode you can also select more approaches.
While the SPM approach is the most stable one, the gcut approach might help in some cases, but sometimes it's too aggressive.
Best,
Christian
On Tue, 5 Jun 2018 00:19:54 +0000, Hupfeld,Kathleen E <[log in to unmask]> wrote:
>Dear SPM experts,
>
>
>After preprocessing my longitudinal data with CAT12, I am getting some "bulges" in the surfaces, but only for certain subjects at some of their time points. For instance:
>
>
>1) Using all of the defaults for "segment longitudinal data" + surface and thickness estimation:
>
>[cid:8f887e4a-bb80-4ab2-96af-6ecb43e4b543]
>
>
>2) Changing strength of skull stripping to "strong" and strength of final clean up to "strong" improves the results for some but not all subjects; same subject/time point as above:
>
>[cid:8e742cd7-67f4-4132-9490-5a86955c7366]
>
>
>Any advice regarding other settings to change or methods to try would be greatly appreciated.
>
>
>Best wishes,
>Kathleen Hupfeld
>
>
>Kathleen Hupfeld
>
>PhD Student, Biobehavioral Science
>Neuromotor Behavior Lab
>Department of Applied Physiology & Kinesiology
>University of Florida
>
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