The main things you need to know are:

1. 3D reconstructions are still generated by DicomImage objects.  This enables them to be viewed in DicomViewer controls via insertion to DicomImages collections.
2. These 3D images are created by using the Make3D method of a DicomVolume Object.
3. A DicomVolume Object is created from either:
   1. A single multi-frame DicomImage Object
      OR
   2. A set of related single frame images in a DicomImages Collection
4. You then control the viewing of the reconstruction by using the methods and properties of the image's Projection Property.
5. 3D specific operations are accessible with Image's PropertiesFor3D property.