【摘要】 目的 观察5.0T MR磁敏感加权成像(SWI)显示脑小静脉及检测脑微出血(CMB)的价值。方法 前瞻性对30例疑因脑小血管病致脑卒中患者行3.0T及5.0T头颅MR检查，对比不同场强下SWI图像质量、显示脑小静脉及检出CMB效果。结果 5.0T SWI图像质量评分、信噪比、对比度噪声比、显示脑深部静脉及皮层下静脉评分、检测CMB数量及脑皮质表面铁沉积检出率均高于3.0T SWI(P均<0.05)。3.0T及5.0T SWI评估CMB位置一致性极好(Kappa=1.0)。结论 5.0T SWI显示脑小静脉及检测CMB效果均优于3.0T SWI,可用于评估脑小血管病所致脑卒中。更多还原

【Abstract】 Objective To observe the value of 5.0T MR susceptibility weighted imaging(SWI) for displaying cerebral small veins and detecting cerebral microbleeds(CMB). Methods Head MR examinations were prospectively performed using both 3.0T and 5.0T MR scanner in 30 stroke patients suspected caused by cerebral small vessel disease. The image quality, effect of displaying cerebral small veins and detecting CMB were compared between 3.0T and 5.0T SWI. Results The image quality scores, signal-to-noise ratios, contrast-to-noise ratios, scores of displaying deep cerebral veins and subcortical veins, the counts of detecting CMB and iron deposition on cortical surface of 5.0T SWI were all higher than those of 3.0T SWI(all P<0.05). High consistency of CMB positions was found between 3.0T and 5.0T SWI(Kappa=1.0). Conclusion The effect of 5.0T MR SWI for displaying cerebral small veins and detecting cerebral microbleeds were better than 3.0T MR SWI, which could be used to assess stroke caused by cerebral small vascular disease.更多还原