The method 8, wherein {HEAD ~ the third difference image} is displayed relative to {TAIL ~ the anatomy} of the organ 
is displayed relative to
The method 8 , wherein { HEAD ~ the third difference image } is displayed relative to { TAIL ~ the anatomy } of the organ
OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH