The DDT file contains the eigenvalues and eigenvectors, which can be easily extracted from the DDT in Matlab. The steps are:
Specific values from a map can be viewed by loading the map of interest (select the map by ticking a box in the Browse VMP window). If you move the mouse, the values will be shown in the "info tab" in BrainVoyager. Note that although the info tab will display "FA: <value>", the displayed value is in fact the map value (i.e. Eigenvalue, radial/axial diffusivity, trace etc depending on the selected map).
Values in a VOI can also be shown, by selecting the map of interest, then go to Analysis > Region of interest analysis. Select the VOI, and then go to ROI Analysis > Options > VOI details and a text box will pop up showing the values. Again these are the values of the selected map and not FA as is indicated in the text box.
In this example the second eigenvalue map was selected. The values of the test voi are displayed below.