Transcranial doppler ultrasonography.
D002545:Brain Ischemia / Q000000981:diagnostic imaging; D002983:Clinical Competence / Q000592:standards; D003406:Credentialing; D004503:Education, Medical, Graduate; D006801:Humans; D008504:Medical Staff Privileges / Q000592:standards; D011871:Radiology / Q000193:education*; D012955:Societies, Medical; D017585:Ultrasonography, Doppler, Transcranial; D014481:United States