Clinical Application of 1.5T Magnetic Resonance Arterial Spin Labeling, Diffusion Weighted Imaging and Magnetic Resonance Aangiography in the Diagnosis of Ischemic Cerebrovascular Disease

Objective To explore the value of magnetic resonance diffusion weighted imaging(DWI),arterial spin labeling(ASL) and magnetic resonance angiography(MRA) in the diagnosis of ischemic cerebrovascular disease.Methods A total of 104 patients with ischemic cerebrovascular diseases treated between March 2010 and May 2012 underwent conventional MR,fluid attenuated inversion recovery(FLAIR),DWI and ASL,and MRA sequence inspection.Then we analyzed the signal characteristics,size and vascular relationship of the lesions shown by these various technologies.Results The detection rate of DWI for acute and subacute cerebral infarction was 100%,without any difference in detecting infarction of different lesion sizes.The detection rate of ASL for large-area acute and subacute cerebral infarction was 100%,and for small area of infarction was 70% with a obvious difference.The detection rate of DWI and ASL for transient ischemic attack(TIA) was 0% and 70% respectively.FLAIR was most sensitive to subcortical porphyritic focal ischemia in TIA patients.Conclusions DWI and ASL can both be used for the early diagnosis of acute cerebral infarction.ASL detection rate is different for large and small area acute and subacute cerebral infarction.Combined application of DWI,ASL and MRA can assess ischemia half dark area and collateral vessels conditions accurately,which is of important value in diagnosing ischemic cerebrovascular disease.