title: Embolus differentiation using multifrequency transcranial Doppler.
authors.forename: David H
authors.initials: DH
authors.lastname: Evans
mesh_terms: D004618:Embolism, Air / Q000000981:diagnostic imaging*; D006801:Humans; D020766:Intracranial Embolism / Q000145:classification / Q000000981:diagnostic imaging*; D017585:Ultrasonography, Doppler, Transcranial / Q000379:methods*