Time: 5/7/2017 4:39:51 PM

<1> is a noninvasive method for the detection of cerebral vascular diseases using Doppler ultrasound to detect the hemodynamics of the main cerebral artery and the physiological parameters of the blood flow. T, its penetration is relatively superior to the neck color, TCD. TCD can be used to detect extracranial vessels, so that the success rate of extracranial artery detection increased transcranial Doppler (Transcranialdoppler)