I haven't used Jim, I have used OsiriX to do some 3D reconstruction in the past It is a fantastic free and open-source Dicom viewer, but a terribly blunt tool for this kind of reconstruction.

The nice thing about MoI being a front-end to reconstruction is having the full power of a fast, efficient modeller instead of a basic 2D spline interface. The trick is keeping the units, etc, but that seems trivial!

It also occurred to me that the same general concept could be used to import, view and edit slices of gcode generated for 3d printing, although tools already exist for that... it might be useful to overlay gcode with original models.I should stop before I draw us off-topic :)

-FDP