Application of susceptibility weighted imaging in diagnosis of acute ischemic stroke

Objective: To investigate the value of susceptibility weighted imaging(SWI) in diagnosis of acute ischemic stroke(AIS) with cerebral microbleeds(CMBs).Methods: Eighty patients with acute ischemic underwent conventional MRI and SWI sequence,to compare and study the relation between acute ischemic and cerebral microbleeds.Results :(1) 28 CMBs occurred in 80 AIS patients,35% of CMBs in AIS;AIS with hemorrhagic transformation(HT) in 10 patients,HT with CMBs in 6 patients;The veins in and periphery AIS increased or decreased.(2) There was no releation between the veins and HT with CMBs;The number of CMBs does not have significant difference with the same side or the opposite side distribution of the AIS region(the P0.05).(3) CMBs showed rounded or ovaled foci of ≤10mm in size that appeared hypointensity or mixted-single intensity in SWI data.Conclusion :SWI has an important value in acute ischemic stroke with CMBs,and SWI sequence should be the first choice in the diagnose of stroke with CMBs.