title: Introductory remarks on the history and current applications of TCS.
authors.affiliation: Parkinson's Disease and Movement Disorders Center, University of Pennsylvania, Philadelphia, PA, USA.
authors.forename: Matthew B
authors.initials: MB
authors.lastname: Stern
mesh_terms: D003937:Diagnosis, Differential; D049673:History, 20th Century; D049674:History, 21st Century; D006801:Humans; D009069:Movement Disorders / Q000000981:diagnostic imaging / Q000266:history*; D010300:Parkinson Disease / Q000000981:diagnostic imaging / Q000266:history; D017585:Ultrasonography, Doppler, Transcranial / Q000266:history* / Q000639:trends