[Mristudio-users] Results using analyze format in DTIStudio

[Graeme Schwindt]

Hello,

At the Toronto workshop, it was mentioned that loading analyze format images
into dtistudio is not recommended as the images are loaded in flipped, and
so the gradient tables will not apply properly, as I understood.

We have analyzed a couple of subjects from two separate datasets using both
the raw dicoms in dtistudio (following AIR), but also with some analyze
format images that have been preprocessed in FSL (eddy-current correction).

Surprisingly, the FA maps and colour maps are qualitatively very similar
between the two methods, which is counterintuitive given the improper
mapping between the gradient table and orientation of the analyze imgs.
Also, the FA values are generally *higher* by 0.2 or so in the analyze
version of the analysis. Is it possible that the analyze format is actually
being read properly though its display is wrong? Any thoughts on the
validity of using analyze format would be appreciated.

Thanks,
Graeme



-- 
Graeme C. Schwindt, HBSc
MD/PhD Student
University of Toronto
graeme.schwindt at gmail.com
416.546.5453
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