title: Ultrasonic properties in marrow-filled and water-filled bovine femoral trabecular bones in vitro.
abstract: Phase velocity and normalized broadband ultrasound attenuation (nBUA) were measured in 22 marrow-filled and water-filled bovine femoral trabecular bone samples. Replacement of marrow by water led to a significant increase in the mean phase velocity of 47 ± 12 m/s (+3.1%), but a decrease in the mean nBUA of 10.4 ± 2.9 dB/cm/MHz (-38.9%). All the ultrasonic properties in the marrow-filled and water-filled samples exhibited significant negative Pearson's correlation coefficients of r = -0.87 to -0.92 with porosity. High correlations were also observed between pairs of the ultrasonic properties, with r = 0.85 to 0.93.
authors.affiliation: Department of Physics, Kangwon National University, Chuncheon 200-701, Republic of Korea. acustica@kangwon.ac.kr
authors.forename: Kang Il
authors.initials: KI
authors.lastname: Lee
mesh_terms: D000818:Animals; D001853:Bone Marrow / Q000737:chemistry / Q000000981:diagnostic imaging*; D002417:Cattle; D005269:Femur / Q000737:chemistry / Q000000981:diagnostic imaging*; D008954:Models, Biological; D009038:Motion; D016062:Porosity; D013016:Sound; D013997:Time Factors; D014465:Ultrasonics; D014463:Ultrasonography; D014867:Water / Q000737:chemistry*; D055114:X-Ray Microtomography
chemical_list: D014867:Water