18 Mar
2014
18 Mar
'14
11:11 p.m.
Hello FreeSurfer experts,
I have a question regarding DTI analysis.
I understand that FA values ranges 0-1, and the values are often thresholded by 0.2. Now I am asked to report ADC, RD, AD values in my ROIs, and wondering what would be the most reasonable way.
[1] Do not apply thresholds, just average the values within a ROI. [2] Use some arbitrary thresholds to each of ADC, RD, AD. [3] create a mask that contains voxels of the above-threshold-FAvalues, then, calculate mean within the mask.
Any suggestions?
Best, Yuko Yotsumoto