[Mristudio-users] FA stats question

[susumu mori]

I have to confirm Hangyi, but my understanding is;


> Slice
> #_Of_Fibers: the number of reconstructed streamlines that penetrate the
> given slice
> Max_Val: The maximum pixel value (if you chose FA, then the FA value) that
> contains the streamlines in the given slice
> Min_Val
> Mean_Val: The mean of the pixel values that contain the streamlines in the
> given slice
> Std_Dev
>
> Pixel#--: The number of pixels that contain the streamlines in the given
> slice
> Max#--      : The maximum number of the streamlines a pixel holds in the
> given slice
> Min#--
> Mean#--     The mean number of the streamlines of the pixels that contain
> the streamlines in the given slice
> Std_Dev-- (Fiber/Pixel)
>
>
>
> Inorder to calculate a mean FA for a selected number of slices, would the
> following be correct?: (ie for slice 1, 2, 3...)
>

This number is already calculated in "Mean Val" column.

>
> ((Pixel#)(Mean_val))1+((Pixel#)(Mean_val))2+((Pixel#)(Mean_val))3.......  /
> total # of pixels
>
>
> Or....
>
> ((#_Of_Fibers)(Mean_val))1+((#_Of_Fibers)(Mean_val))2+((#_Of_Fibers)(Mean_val))3.......
> / total #_Of_Fibers
>
>
>
> Also, could you possibly explain what the rest of the values are?
> (especially beyond pixel #)
>
> Thank you again, I really appreciate the help
> Matt Gnirke
>
>
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>
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