What Luis is saying makes perfect sense. And it becomes even more complicated when the Neuromorphometrics data is only a surrogate of the data that is actually used for analysis/clinical trials (the target subject's segmentations, volumes, etc...).

While the CC-BY-NC does allow derivatives, the license itself does not say anything about our ability to use these derivatives in a commercial fashion.
For example, our department is acts as a contract research organization (CRO) when it analyses data from clinical trials. The Neuromorphometrics data will be used to create derivatives (the subject's segmentations themselves), and then extract biomarkers from them (volumes, shape, etc..). Can we use the Neuromorphometrics data to generate these derivatives and then use the derivatives in a commercial way? What if, instead of our CRO activities, we are just analysing clinical data from the hospital? Would it then be considered non-commercial use of derivatives? Probably not.

What I'm trying to say is that one might not make commercial use of theNeuromorphometrics data but only of its derivatives. So the big question is actually: Are we able to use the derivatives commercially? Are derivatives still protected by the NC clause? 

If the NC condition limits our ability to provide support to drug-trials and collaborate with hospitals and clinics by providing them with segmentations and derived biomarkers, then it would be impossible for use to use the data.

Jorge Cardoso