It is an object of {HEAD ~ the invention} to reduce {TAIL ~ the risk} of microembolic cereberal vessel occlusion when treating a stenosed cerebral artery 
to reduce
It is an object of { HEAD ~ the invention } to reduce { TAIL ~ the risk } of microembolic cereberal vessel occlusion when treating a stenosed cerebral artery
OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH