there are many DICOM viewers available, ranging from the fairly horrible plugins for imageJ to very sophisticated things with maya or COMSOL or whatnot.
Sadly, it's MacOS-only. Would be nice to have something Qt or GTK-based.
There are many free DICOM viewer in the Ubuntu/Debian/Pop_OS repositories. I don't remember which one I used, but at least some of them allow to visit your organs in 3D :)