[Mristudio-users] Noise level setting for AIR in DTI Studio

[susumu mori]

If you have two repeated sets of DTI, yu can easily see the degree of
motion by showing substraction images. When AIR is working, you can
see that the subtraction images become just noises. The subtraction
images can be created by the "mean, STD" button.

The threshold for AIR is empirical. When it's too low, AIR trys to
match noises and motion may not be corrected. When it's too high, the
brains are not well defined and the results deteriorates. In between
these is a range of values AIR works. You have to figure it out
although once you find it you can keep using the same value for other
data from the same scanner.

On 9/9/09, [Seongjin] <choisj70 at gmail.com> wrote:
> Dear all,
>
> I heard of that empirical noise level is 40 for AIR in DTI Studio and AIR
> is
> sensitive to the noise level.What kind of differences we should know about
> AIR between using higher noise level and lower noise level?
>
> -SC
>

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