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目的探讨彩色多普勒和磁共振血管成像(MRA)对颈动脉粥样硬化的诊断价值。方法用CDFI及MRA 2种方法检查42例缺血性脑梗塞患者和40例对照组的颈动脉。超声检查颈动脉内径、测量颈动脉内膜-中层厚度(IMT)、最狭窄处管径,了解斑块情况,观察颈动脉狭窄程度。MRA检查颈动脉内径,测量病变动脉信号缺失情况,判断颈动脉狭窄程度。结果超声检查显示缺血性脑梗塞患者颈动脉病变发生率明显高于对照组(P<0.001)。本组病例轻度、重度狭窄的MRA与超声诊断完全符合。1例血管闭塞超声低估为重度狭窄,1例超声判断为中度狭窄MRA高估为重度狭窄。MRA和超声结果具有极好的一致性。结论超声与MRA在诊断颈动脉狭窄中具有互补作用,两者结合使用能提高评估狭窄程度的准确性。
Objective To investigate the diagnostic value of color Doppler and magnetic resonance angiography (MRA) for carotid atherosclerosis. Methods The carotid arteries of 42 ischemic cerebral infarction patients and 40 control subjects were examined by CDFI and MRA. The diameter of the carotid artery was examined by ultrasound. The carotid intima - media thickness (IMT) and the diameter of the narrowest part of the carotid artery were measured. The plaque status was observed and the degree of carotid artery stenosis was observed. MRA examination of carotid artery diameter, measurement of diseased artery signal loss, to determine the degree of carotid artery stenosis. Results Ultrasound examination showed that the incidence of carotid artery lesions in patients with ischemic cerebral infarction was significantly higher than that in the control group (P <0.001). This group of patients with mild, severe stenosis MRA and ultrasound in full compliance with the diagnosis. One case of vascular occlusion was underestimated as severe stenosis, one case of moderate stenosis as MRA overestimated as severe stenosis. MRA and ultrasound results have excellent consistency. Conclusion Ultrasound and MRA in the diagnosis of carotid artery stenosis have a complementary effect, the combination of the two can improve the accuracy of assessment of stenosis.