The main things you need to know are:

1. 3D reconstructions are still generated by DicomImage objects.  This enables them to be viewed on DicomViewer controls via insertion to DicomImageCollection.
2. These 3D images are represented by DicomImage3D class.
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 accessible within the DicomImage3D class, which lists all 3D specific operations of that image.