[Mristudio-users] Tractography: More decimal places for ADC mean values?

[Helen Carlson]

Hi all,
I am taking FA and ADC measurements of the Cingulum and Fornix in epilepsy patients using tractography in DTI Studio. I have noticed that the ADC values of the selected fibres in the Cingulum are in the region of 0.0007 but that this measurement only goes to 4 decimal places. In order to detect any differences in ADC across patient groups I would need more decimal places.

I have clicked the statistics profile button in the Fiber Statistics window and have gotten a list of ADC values for each slice with a greater number of decimal places (i.e., 7.11e-004 which I assume is 0.000711) for my tract.

So my question is, can I take the mean of all these values in the Statistics Profile window (for a given slice orientation) and use that as my mean ADC value for the selected tract?

OR is there an easier way for me to get the mean ADC for a selected fiber tract with a greater number of decimal places?

Thanks in advance for your help.
Helen.


Helen Carlson, Ph.D.
Neuropsychology
Department of Neurosciences
Alberta Children's Hospital
2888 Shaganappi Trail NW, Calgary


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