Clinical application of MR susceptibility weighted imaging in the diagnosis of cerebral micro-bleedings

Objective:To explore the diagnostic value of MR susceptibility weighted imaging(SWI) in the cerebral micro-bleedings(CMBs),as well as its application in the treatment of cerebral infarction.Methods:Conventional MR sequences including T1WI,T2WI,T2FLAIR and DWI sequences were performed in 232 patients as well as SWI sequence.The numbers of CMB and sensitivity of positive rate on SWI and conventional sequences were compared and statistically analyzed.Results:28 cases had the cerebral CMBs with a total of 186 CMB lesions on SWI,38 CMBs were detected on T2WI,and the sensitivity was 20.4%.21 CMBs were detected on T1WI,and the sensitivity was 11.3%.41 CMBs were detected on T2FLAIR,and the sensitivity was 22%.24 CMBs were detected on DWI,and the sensitivity was 12.0%.There was statistic difference in showing micro hemorrhagic lesions among those sequences,P0.05.CMBs were detected on SWI,and the sensitivity was 100%.SWI was more sensitive than other sequences in showing micro hemorrhagic lesions,P0.05.Of 28 cases,22 had the history of hypertension,and 14 had hemorrhagic stroke,8 had ischemic stroke,and 5 had with both ischemic and hemorrhagic stroke.1 patient happen found the CMB by check-up.Conclusion:SWI has predominant advantage over conventional MRI sequences in detecting CMBs.Detection of CMBs can reflect cerebral micro-vessel disease.SWI provides important reference for the treatment and evaluating prognosis of cerebral infarction.