Would be really nice to have a 3D rendered image (e.g., MIP image of a PET) in the same view (i.e., as a panel) as the MPR slices. Double points if it has a localizer function (click on a feature on the 3d rendering and MPR slices automatically localize to that location)!

Great product. Use it almost daily.

+1
It would be a really useful feature.

Here are my suggestions for new features:

MPR synchronization of two sequences - both within a single study and between different studies of the same patient. This would make it easier to assess the progression of changes. Some DICOM viewers can already recognize anatomical structures and align MPR accordingly, but I understand this is quite an advanced feature. Perhaps as a starting point, it would be beneficial to enable MPR comparison within a single "frame" in the study.
The ability to save and restore the state of all windows - like a "Screenshot," but one that remembers positions, zoom levels, window settings, etc.
Would it be possible to make the MPR axes thinner and semi-transparent? Currently, they're too thick and obstruct the image. Additionally, the MPR axes should have a central "dead zone" where rotation isn't registered - sometimes I accidentally brush the mouse near the center, and everything flips over.

These are my current suggestions. I'm looking forward to future versions. You've created a fantastic program - please keep developing it!