Lead 168 corresponds to lead 68, illustrated in FIG 1, with {HEAD ~ sensor} 164 corresponding to {TAIL ~ sensor} 64 
corresponding to
Lead 168 corresponds to lead 68 , illustrated in FIG 1 , with { HEAD ~ sensor } 164 corresponding to { TAIL ~ sensor } 64
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD OTH REL REL TAIL TAIL TAIL TAIL TAIL OTH