{HEAD ~ NMR data} indicative of the motion of the anterior abdominal wall of a subject is acquired just prior to each image data pulse sequence in {TAIL ~ an NMR} scan 
{ HEAD ~ NMR data } indicative of the motion of the anterior abdominal wall of a subject is acquired just prior to each image data pulse sequence in { TAIL ~ an NMR } scan
HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH