{HEAD ~ System} and method to determine the location and {TAIL ~ orientation} of an indwelling medical device 
to determine
{ HEAD ~ System } and method to determine the location and { TAIL ~ orientation } of an indwelling medical device
HEAD HEAD HEAD HEAD HEAD OTH OTH REL REL OTH OTH OTH TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH