title: Artifacts and pitfall errors associated with ultrasound-guided regional anesthesia. Part I: understanding the basic principles of ultrasound physics and machine operations.
authors.affiliation: Department of Anesthesiology, Dartmouth Medical School, Dartmouth-Hitchcock Medical Center, Lebanon, NH 03756, USA. brian.sites@hitchcock.org
authors.forename: Brian D
authors.initials: BD
authors.lastname: Sites
authors.forename: Richard
authors.initials: R
authors.lastname: Brull
authors.forename: Vincent W S
authors.initials: VW
authors.lastname: Chan
authors.forename: Brian C
authors.initials: BC
authors.lastname: Spence
authors.forename: John
authors.initials: J
authors.lastname: Gallagher
authors.forename: Michael L
authors.initials: ML
authors.lastname: Beach
authors.forename: Vincent R
authors.initials: VR
authors.lastname: Sites
authors.forename: Gregg S
authors.initials: GS
authors.lastname: Hartman
mesh_terms: D000765:Anesthesia, Conduction / Q000295:instrumentation*; D016477:Artifacts; D006801:Humans; D055585:Physical Phenomena; D010825:Physics; D014465:Ultrasonics; D014463:Ultrasonography; D018615:Ultrasonography, Doppler, Color