title: Interlaboratory comparison of ultrasonic backscatter, attenuation, and speed measurements.
abstract: In a study involving 10 different sites, independent results of measurements of ultrasonic properties on equivalent tissue-mimicking samples are reported and compared. The properties measured were propagation speed, attenuation coefficients, and backscatter coefficients. Reasonably good agreement exists for attenuation coefficients, but less satisfactory results were found for propagation speeds. As anticipated, agreement was not impressive in the case of backscatter coefficients. Results for four sites agreed rather well in both absolute values and frequency dependence, and results from other sites were lower by as much as an order of magnitude. The study is valuable for laboratories doing quantitative studies.
authors.affiliation: Medical Physics Department, University of Wisconsin, Madison, USA.
authors.forename: E L
authors.initials: EL
authors.lastname: Madsen
authors.forename: F
authors.initials: F
authors.lastname: Dong
authors.forename: G R
authors.initials: GR
authors.lastname: Frank
authors.forename: B S
authors.initials: BS
authors.lastname: Garra
authors.forename: K A
authors.initials: KA
authors.lastname: Wear
authors.forename: T
authors.initials: T
authors.lastname: Wilson
authors.forename: J A
authors.initials: JA
authors.lastname: Zagzebski
authors.forename: H L
authors.initials: HL
authors.lastname: Miller
authors.forename: K K
authors.initials: KK
authors.lastname: Shung
authors.forename: S H
authors.initials: SH
authors.lastname: Wang
authors.forename: E J
authors.initials: EJ
authors.lastname: Feleppa
authors.forename: T
authors.initials: T
authors.lastname: Liu
authors.forename: W D
authors.initials: WD
authors.lastname: O'Brien
authors.forename: K A
authors.initials: KA
authors.lastname: Topp
authors.forename: N T
authors.initials: NT
authors.lastname: Sanghvi
authors.forename: A V
authors.initials: AV
authors.lastname: Zaitsev
authors.forename: T J
authors.initials: TJ
authors.lastname: Hall
authors.forename: J B
authors.initials: JB
authors.lastname: Fowlkes
authors.forename: O D
authors.initials: OD
authors.lastname: Kripfgans
authors.forename: J G
authors.initials: JG
authors.lastname: Miller
mesh_terms: D000433:1-Propanol; D000180:Acrylic Resins; D000362:Agar; D004867:Equipment Design; D005898:Glass; D006108:Graphite; D006801:Humans; D007753:Laboratories; D019047:Phantoms, Imaging; D010969:Plastics; D014465:Ultrasonics; D014463:Ultrasonography / Q000592:standards; D014867:Water
chemical_list: D000180:Acrylic Resins; D010969:Plastics; D014867:Water; D006108:Graphite; D000362:Agar; D000433:1-Propanol