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