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