Clinical significance of MRA,DWI combined with carotid duplex ultrasound in the evaluation of watershed cerebral infarction
Objective To investigate the clinical significance of magnetic resonance angiography(MRA),diffusion weighted imaging(DWI)combined with carotid duplex ultrasound in evaluating watershed cerebral infarction.Methods The clinical data of 164 patients with cerebral infarction who were admitted to Dafeng Hospital of Chaoyang District from July 2021 to December 2022 were collected and analyzed.According to the location of cerebral infarction,the patients were divided into control group(n=82,non-watershed cerebral infarction)and study group(n=82,watershed cerebral infarction).All the patients were received MRA,DWI and carotid duplex ultrasound.The characteristics of MRA,DWI and carotid duplex ultrasound were compared between the two groups.Receiver operating characteristic(ROC)curve was plotted,and the area under the curve(AUC)was used to evaluate the diagnostic value of MRA and DWI combined with carotid duplex ultrasound for watershed cerebral infarction.Results The proportion of patients with moderate and above middle cerebral artery stenosis in the observation group was higher than that in the control group(P<0.05).The partial anisotropy index(rFA)of the observation group was higher than that of the control group(P<0.05),and the mean diffusion index(rMD)of the observation group was lower than that of the control group(P<0.05).The proportion of patients with carotid plaques in the observation group was higher than that in the control group(P<0.05).The AUC values of MRA,DWI,carotid duplex ultrasound and their combination for the diagnosis of watershed cerebral infarction were 0.774,0.677,0.732 and 0.884,respectively.The AUC value of the combined diagnosis of the three tests was higher than that of the single diagnosis(P<0.05).Conclusion MRA,DWI and carotid duplex ultrasound have important value in the diagnosis of watershed cerebral infarction,and their combined value is even higher.
Magnetic resonance angiographyDiffusion weighted imagingCarotid duplex ultrasoundWatershed cerebral infarction
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