[Mristudio-users] DTI mapping

[susumu mori]

Hi Qiuyun,

I would suggest you to try "pixel rejection" instead of "slice rejection".
You can find a description of the pixel-rejection method here;
https://www.mristudio.org/wiki/changelog/dtistudio-3.0.2

<https://www.mristudio.org/wiki/changelog/dtistudio-3.0.2>This method is
similar to RESTORE. We are working on the paper, but meanwhile you can refer
to the RESTORE paper by Pierpaoli.

I hope Hangyi can elaborate how we avoid FA>1.


On Thu, Dec 16, 2010 at 10:33 AM, Qiuyun Fan <qiuyun.fan at vanderbilt.edu>wrote:

> Dear DTIstudio experts,
>
> I was using DTI studio to calculate FA maps. I tried both standard
> linear fitting and automatic outlier rejection by slices. I was
> expecting FA>1 at some locations where there're serious artifacts, but
> I found 0<FA<1 nicely across the volume. I was wondering if there's
> regularization on FA when fitting signals to the tensor. If you can
> possibly recommend a reference paper for the outlier rejection method
> used in DTI mapping, it'll be very helpful.
>
> Any comments will be highly appreciated.
>
> Qiuyun
>
> --
> Qiuyun Fan
> Research Assistant
> Education and Brain Research Lab
> Institute of Imaging Science
> Biomedical Engineering
> Vanderbilt University
> Email: qiuyun.fan at vanderbilt.edu
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