[Rich66]

If only Frank Llloyd Wright was around to chime in

I came across these which may or may not be relevant:
http://radiology.rsnajnls.org/cgi/co...tract/250/1/41

http://www.medscape.com/viewarticle/487388_2

http://books.google.com/books?id=p-u...esult&resnum=5