Issue with Displaying FDR-Corrected Data on SUMA (striping artifacts and background not removed)

[Tealog0]

I performed a paired 3dttest++ on my data (track counts mapped onto std.60.smoothwm nodes), followed by multiple comparison correction using 3dFDR. After mapping the results onto lh:MNI_N27:ld60:inflated in SUMA, I noticed some unexpected behavior. When I pressed the background toggle ('b'), the background was not removed as expected, and the mapped data appeared with abnormal striped artifacts (see attached image).

I would like to know whether this issue is related to my data or if it is a problem with SUMA. Any guidance or suggestions would be greatly appreciated.

[dglen]

I think this was a bug in the software last year that has since been fixed. If you can't upgrade to a newer version of AFNI, then consider the workarounds in this post:

SUMA background color toggle (b key), not working properly.

We are aware of that bug, and we are working on it. In the meantime, there are a couple workarounds. Use the 'a' key to hide background coloring on nodes above threshold. Change the coloring of the background convexity to show only one color with "Switch Dset" to Convexity, I Range Min and Max to 0. You will have to do this for both hemispheres separately or click the 'I' to the left of the Min, Max range to set both hemispheres at the same time. [image]

[Tealog0]

@SUMA background color toggle (b key)

We are aware of that bug, and we are working on it. In the meantime, there are a couple workarounds. Use the 'a' key to hide background coloring on nodes above threshold. Change the coloring of the background convexity to show only one color with "Switch Dset" to Convexity, I Range Min and Max to 0. You will have to do this for both hemispheres separately or click the 'I' to the left of the Min, Max range to set both hemispheres at the same time.

Thank you so much for the helpful explanation and workarounds! I really appreciate your quick response and the clear instructions. This will definitely help until I can upgrade AFNI. Thanks again!