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Dear Freesurfers,

while acquiring our fMRI data we stumbled upon an artifact in our structural data none of us has ever seen before.
I wanted to ask, if maybe you have seen something like this and have an idea about its origin?

We followed your suggesed morphometry protocol (without multiecho, based on a standard MRAGE siemens protocol --> MailScanner has detected a possible fraud attempt from "secure-web.cisco.com" claiming to be https://surfer.nmr.mgh.harvard.edu/fswiki/FreeSurferWiki?action=AttachFile&do=get&target=FreeSurfer_Suggested_Morphometry_Protocols.pdf ).
Our structural acquisition parameters were:

192 slices, voxel size = 1 x 1 x 1 mm, TR = 1600 ms, TE = 2360 ms, TI = 1200 ms, flip angle = 9 °, FOV = 256 mm, bandwidth = 250 Hz/ Px, echo spacing = 6.78 ms.

We were using a 3 Tesla Magnetom Vida scanner with a 64-channel head coil.


There's a picture of the artifact attached.

Thanks a lot, we'd be really curious to know, whether you've seen somehting like this before!

Best,
Marilena Wilding