Ruan Li-Tao, Duan Yun-You, Cao Tie-Sheng, Zhuang Lei, Huang Lijun
Department of Ultrasonics, Tangdu Hospital, No.1 Xinsi Road, Xi'an, Shaanxi Province, People's Republic of China, 710038.
J Clin Ultrasound. 2006 Feb;34(2):60-9. doi: 10.1002/jcu.20201.
To study the hemodynamic characteristics of moyamoya disease with color Doppler (CD) and power Doppler (PD) sonography.
The hemodynamic parameters of intracranial and extracranial arteries from 17 patients with moyamoya disease confirmed via digital subtraction angiography and 30 healthy controls were studied with conventional and transcranial CD and PD.
The moyamoya vessels were detected as scattered color Doppler signal with low velocity and a low resistance index (RI) at the base of the brain in 10 of the 17 patients. The RI of the common carotid arteries and the internal carotid arteries of the patients was significantly higher, whereas the peak velocity was lower than in controls. The posterior carotid arteries were more frequently involved in children (43.8%) than in adults (5.6%).
Transcranial CD and PD can be used to demonstrate the stenosis and occlusion of intracranial arteries and the abnormal vascular network at the base of the brain in most cases. Combined with the hemodynamic characteristics of extracranial arteries and the symptoms of the patients, an accurate diagnosis of moyamoya disease could be made in the majority of cases using PD.
利用彩色多普勒（CD）和能量多普勒（PD）超声研究烟雾病的血流动力学特征。
采用传统及经颅CD和PD对17例经数字减影血管造影确诊的烟雾病患者及30例健康对照者的颅内和颅外动脉血流动力学参数进行研究。
17例患者中有10例在脑底部检测到烟雾血管为散在的彩色多普勒信号，速度低且阻力指数（RI）低。患者颈总动脉和颈内动脉的RI显著更高，而峰值速度低于对照组。儿童后交通动脉受累情况（43.8%）比成人（5.6%）更常见。
经颅CD和PD在大多数情况下可用于显示颅内动脉狭窄和闭塞以及脑底部异常血管网。结合颅外动脉血流动力学特征及患者症状，多数情况下利用PD可对烟雾病做出准确诊断。
