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偏头痛是临床上常见病、多发病之一，是一种周期性发作性神经?血管功能障碍，以反复发作的偏侧或双侧头痛为特征，间歇期正常。既往对本病的诊断主要依靠临床检查来确诊，缺少客观诊断的依据。经颅多普勒超声(TCD)能直接对颅内外主要动脉的血流速度、频谱形态、脉动指数等进行
Migraine is one of the most common clinical and frequently-occurring diseases in clinic. It is a recurrent neurovascular dysfunction characterized by repeated episodes of bilateral or bilateral headache with normal intermittent periods. Previous diagnosis of the disease rely mainly on clinical examination to confirm the lack of objective basis for diagnosis. Transcranial Doppler ultrasound (TCD) can be directly on the main intracranial artery blood flow velocity, spectral shape, pulse index, etc.