title: Low-bandwidth tele-ultrasound.
abstract: We examined the acceptability and diagnostic accuracy of dynamic ultrasound images transmitted at 128 kbit/s and 384 kbit/s. The gold standard was the direct recording of 200 ultrasound examinations on video-tape. The taped images were later transmitted at both 128 kbit/s and 384 kbit/s and recorded, resulting in three tapes for each case. Four observers viewed each tape individually. Ninety per cent of images transmitted at 384 kbit/s were rated as diagnostically acceptable compared with 32% of images transmitted at 128 kbit/s. Diagnostic agreement between tapes transmitted at 384 kbit/s and the gold standard was 85%, compared with 78% for 128 kbit/s transmissions. Observers were not satisfied with low-bandwidth transmission of ultrasound images despite adequate diagnostic accuracy. Dynamic ultrasound images transmitted at 384 kbit/s were viewed as both diagnostically acceptable and accurate.
authors.affiliation: Department of General Practice and Primary Care, University of Aberdeen, UK. j.a.brebner@abdn.ac.uk
authors.forename: J A
authors.initials: JA
authors.lastname: Brebner
authors.forename: H
authors.initials: H
authors.lastname: Ruddick-Bracken
authors.forename: E M
authors.initials: EM
authors.lastname: Brebner
authors.forename: F J
authors.initials: FJ
authors.lastname: Gilbert
authors.forename: J R
authors.initials: JR
authors.lastname: Maclean
authors.forename: L D
authors.initials: LD
authors.lastname: Ritchie
authors.forename: P
authors.initials: P
authors.lastname: Smith
authors.forename: A
authors.initials: A
authors.lastname: Thompson
mesh_terms: D004581:Electronics; D006801:Humans; D012680:Sensitivity and Specificity; D013686:Telemetry / Q000295:instrumentation*; D014463:Ultrasonography; D014743:Videotape Recording