Several small things:

1. If you draw a ROI, it should be a child node of the image in the datamanager.

2. If you draw a ROI, it should be selected in the datamanager afterwards

3. The "Fiber Processing" group box should in fact be a separate view in the synthetic images perspective.

4. The logical constructs using and/or/not are very non-intuitive. One way to improve on this would be to allow hitting "NOT" and then drawing the ROI, which would then already be inverted. Redesign of combining logical operator, to make it usable for medical personell.