The value of susceptibility-weighted imaging in diagnosis and treatment of acute cerebral infarction complicating brain bleeding

Objective:To investigate the imaging feature of susceptibility-weighted imaging(SWI) in acute cerebral infarction(ACI) complicating brain bleeding,and to elaborate the clinical applications of SWI in ACI.Methods:48 cases of patients with ACI were performed with computer tomography(CT),and within 12 hours conventional MRI,magnetic resonance angiography(MRA),diffusion weighted imaging(DWI) and susceptibility-weighted imaging(SWI) were performed simultaneously.The related data were analyzed by statistics.Results:18 in 48 cases with ACI complicated brain bleeding showed by SWI,while no definite brain bleeding showed by CT,conventional MRI and DWI.Inhomogeneous signal showed by DWI,which refer to SWI,were thought to be brain bleeding in 5 cases.CT showed ACI in 34 cases;Conventional MRI showed in 40;DWI showed in 48;SWI showed in 39,and the size of focus was smaller than DWI,the fringe of focus unclear.Veins in the area of infarction showed by SWI reduced in 38 cases,increased in 4 and normal in 6.MRA manifested the stenosis,obliteration or reduction in branch of anterior cerebral artery,middle cerebral artery and posterior cerebral artery in 13 cases.Conclusion:SWI can manifest the specificity in ACI complicating brain bleeding,and can be used to estimate the activity of brain tissue of infarction zone,which significantly influence the decision for clinic treatment.SWI should be used to be a routine examination for the diagnosis of ACI.