I'm working on a voxel-based modelling application and one of the features that I've implemented is a method to do a 3D mesh reconstruction from a series of 2D image slices (similar to an MRI). I've got a basic brain scan image set that I've been working on, but ultimately I'd like to release a small demo example showing how to do the mesh reconstruction. However, in order to do this I need the images to be legally open source so that I'm not distributing images that have copy right restrictions. I've scoured the net trying to find a suitable image set but haven't been able to find anything.
Does anyone have any resources they could point me to that I could use for my application?