Krejza J, Rudziński W, Mariak Z
Zakładu Radiologii Akademii Medycznej w Białymstoku.
Neurol Neurochir Pol. 2001;35 Suppl 5:101-9.
Transcranial color Doppler sonography, in contrary to conventional transcranial Doppler ultrasound, allows outlining of the parenchymal structures and visualization of the vessel examined. Angle-corrected blood velocities can be obtained which are closer to in-situ values. In this educational assay, we demonstrate cerebral vascular anatomy using 3-D MR angiographic images of the major cerebral arteries to show their relationship to neighboring structures, the acoustic window, and the ultrasound beam. We describe principles of the examination, and discuss the different types of physiological flow velocity spectra. We show how to identify with color Doppler ultrasonography the main intracranial arterial trunks, and how to avoid pitfalls caused by anatomic variability of their course and location. We draw attention on significant age and sex dependency of blood flow parameters which makes standardization of obtained transcranial Doppler results indispensable for clinical valuable concluding.
与传统经颅多普勒超声不同，经颅彩色多普勒超声能够勾勒出实质结构并可视化所检查的血管。可以获得经角度校正的血流速度，其更接近原位值。在本教学分析中，我们使用主要脑动脉的三维磁共振血管造影图像来展示脑血管解剖结构，以显示它们与相邻结构、声学窗口和超声束的关系。我们描述了检查原理，并讨论了不同类型的生理血流速度频谱。我们展示了如何通过彩色多普勒超声识别主要的颅内动脉主干，以及如何避免因其走行和位置的解剖变异所导致的陷阱。我们提请注意血流参数存在显著的年龄和性别依赖性，这使得对获得的经颅多普勒结果进行标准化对于得出具有临床价值的结论必不可少。
