1. Noninvasive transcranial Doppler ultrasound recording of flow velocity in basal cerebral arteries;Aaslid;J Neurosurg,1982
2. Evaluation of cerebrovascular spasm with transcranial Doppler ultrasound;Aaslid;J Neurosurg,1984
3. Power M-mode Doppler (PMD) for observing cerebral blood flow and tracking emboli;Moehring;Ultrasound Med Biol,2002
4. Importance of angle correction in the measurement of blood flow velocity with transcranial Doppler sonography;Krejza;AJNR Am J Neuroradiol,2001
5. Importance of angle correction in transcranial color-coded duplex insonation of arteries at the base of the brain;Lepic;Vojnosanit Pregl,2015