[Mristudio-users] Background noise level

[susumu mori]

The brain masking by a simple threshold does not guarantee suppression of
all extra-cranial signals. It is very common that a threshold level that
doesn't mask any brain tissues leave some pixels outside the brain.
If you want a very clean brain extraction, you can try region growing or
skull-strip tools in RoiEditor or other software.

On Mon, Nov 29, 2010 at 10:42 AM, Chunxiao Zhou <czhou4 at gmail.com> wrote:

> Dear DTIstudio experts,
>
> When I move my cursor over the DWIs, I found the intensity values of most
> brain region are large. And background intensities range from 0-30. But a
> few pixels have intensity range from 3-10. I am wondering if I still can set
> the background noise level to 10, or even higher? Does the background noise
> level should guarantee to keep whole brain or allow exclusion of a few
> pixels within brain?
>
> Thank you!
>
> Chunxiao(Andrew)
>
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