{HEAD ~ The displacement values} may be employed to produce {TAIL ~ a signal} indicative of a respiration phase that can be used in connection with motion artifact reduction techniques 
employed to produce
{ HEAD ~ The displacement values } may be employed to produce { TAIL ~ a signal } indicative of a respiration phase that can be used in connection with motion artifact reduction techniques
HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH