{TAIL ~ System} for marking the locations of imaged tissue with respect to the surface of {HEAD ~ the tissue} 
{ TAIL ~ System } for marking the locations of imaged tissue with respect to the surface of { HEAD ~ the tissue }
TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD