[Camino-users] DTI Data Quality and Possible Options (RESTORE)?

[Rowena Chin]

Dear All,

Would like to get some opinions and advice from helpful contributors on
this forum regarding the quality of the DTI data that I have been asked to
process. I have attached some screenshots in this post so it illustrates my
question.

1) The datasets seem to have a similar problem which I'm guessing, is due
to susceptibility artefacts. It seems to be a recurrent issue around the
same areas and slices (around x=125-130, y=119-122, z=8-10).

Based on the images, what would be the ideal way forward? Would using the
RESTORE function help in this case?

2) The following parameters were used:

- 3 T Philips scanner
- 15 directions in the same axial plane using single-shot, spin-echo echo
planar imaging (EPI) sequence, *b* value of 0 and 800 s/mm2, TR/TE should
be 3700/56, matrix 128 × 128, slice thickness 3 mm with no gap and FOV of
240 mm2.

Based on the current parameters, is anyone able to provide advice on what
could be altered to improve data quality? I am definitely not an expert
when it comes to the MR physics - though I hope to understand it better.
Could it be due to the 3mm slice thickness and through-slice dephasing?

Best wishes,
Michiko
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