Dear Kahori,
> I have a question about DTI topup.
>
> My DTI data is b0+64 direction image with A->P and b0 image with P->A.
> "topup" with both b0 worked fine, but there was an error when I did "applytopup" to whole b0+64 direction data.
>
> I guess the error came from the difference of dimension between two input images; b0+64 dir and b0.
> Do I need b0+64 dir A->P data and b0+64 dir P-A data for applytopup?
> Are there any solution to apply topup with b0 and b0+64dir data?
we no longer recommend using applytopup. We instead recommend feeding the output (the estimated field) from topup into the eddy tool. The eddy tool will do what applytopup used to do (i.e. to apply the field estimated by topup to create undistorted images) _and_ also correct for subject movement, eddy current-induced distortions and signal dropout.
Jesper
>
> Thank you in advance,
> Kahori
|