Diagnostic Advances
Copyright ©The Author(s) 2016.
World J Cardiol. Jul 26, 2016; 8(7): 383-400
Published online Jul 26, 2016. doi: 10.4330/wjc.v8.i7.383
Figure 1
Figure 1 Circle of Willis and Ultrasonographic study by transcranial Doppler ultrasound. A: Circle of Willis; B: Transmission of ultrasound beam through skull using pulsed Doppler sectorial probe with a 2.0-3.5 MHz emission frequency. Probe is positioned on temporal window. MCA: Middle cerebral artery.