Handy C4D Diacom image reader plug-in developed by Kent Barber at GameLogicDesign Ltd in New Zealand.
Free Dicom image viewer:
http://www.gamelogicdesign.com/dicom.html
My C4D set up file for faking volume-metric look , after downloading plug-in from GameLogicDesign, can be downloaded at: https://www.dropbox.com/s/u69rzcy83imy877/Dicom-set-up-Minus-plug-in.zip?dl=0
I was having trouble using a cloner and random effector to get the images to stack in the correct order, so I went with a shader effector instead, and it seems to be working!