Thank You Douglas. I figured out that multiplicating by a fixed value could
make the trick.
Have a good weekend.
Dorian
2013/10/29 Douglas N Greve gr...@nmr.mgh.harvard.edu
What is the problem with small values? You can multiply them by 100 to
give you percent of brain. Or multiply them by
What is the problem with small values? You can multiply them by 100 to
give you percent of brain. Or multiply them by 1000 to give you tenths
of percents
doug
On 10/24/2013 12:58 PM, Dorian P. wrote:
Thank you Douglas.
The eTIV has values like 1543825. Dividing ROIs by this value would
Dear all,
Excuse if these are simple questions but I am a bit confused on the
significance of the volume measures.
1. Are the volumes of ROIs calculated after normalization?
2. If volumes are calculated post-normalization, why is correction for eTIV
needed?
3. What is the quickest way to
On 10/24/2013 10:37 AM, Dorian P. wrote:
Dear all,
Excuse if these are simple questions but I am a bit confused on the
significance of the volume measures.
1. Are the volumes of ROIs calculated after normalization?
No, everything is done in native space.
2. If volumes are calculated
Thank you Douglas.
The eTIV has values like 1543825. Dividing ROIs by this value would create
very small values.
Is there a standard TIV (i.e. from the talairach brain) to use as
denominator for creating a ratio value? Or what is the best way to create a
reasonable factor (i.e. 0.7-1.3) to
Why is a small # a problem? It simply represents the fraction of the
total intracranial volume occupied by that structure.
cheers
Bruce
On Thu, 24 Oct 2013,
Dorian P. wrote:
Thank you Douglas.
The eTIV has values like 1543825. Dividing ROIs by this value would create
very small values.
