title: Distribution of longitudinal wave properties in bovine cortical bone in vitro.
abstract: The detailed spatial distributions of longitudinal ultrasonic velocity in cortical bone specimens obtained from three bovine femoral diaphysis were experimentally investigated using a pulse-echo system. The relationship between velocity, density, bone mineral density (BMD) and microstructure was investigated. Velocity was found to vary as a function of the direction of propagation and the location of the measured specimens in the bone diaphysis. A significant correlation was found between density and velocity, and between density and BMD. In some parts with plexiform structure, clear variations in velocity anisotropy were found despite no significant difference in density, BMD and microstructure.
authors.affiliation: Orthopaedic Surgery, Hamamatsu University School of Medicine, 1-20-1 Handayama Hamamatsu, Shizuoka 431-3192, Japan. yy14@hama-med.ac.jp <yy14@hama-med.ac.jp>
authors.forename: Yu
authors.initials: Y
authors.lastname: Yamato
authors.forename: Mami
authors.initials: M
authors.lastname: Matsukawa
authors.forename: Takahiko
authors.initials: T
authors.lastname: Otani
authors.forename: Kaoru
authors.initials: K
authors.lastname: Yamazaki
authors.forename: Akira
authors.initials: A
authors.lastname: Nagano
mesh_terms: D000465:Algorithms; D000818:Animals; D002417:Cattle; D003198:Computer Simulation; D004548:Elasticity; D005269:Femur / Q000000981:diagnostic imaging* / Q000502:physiology*; D020342:Finite Element Analysis; D007089:Image Enhancement / Q000379:methods*; D007090:Image Interpretation, Computer-Assisted / Q000379:methods*; D021621:Imaging, Three-Dimensional / Q000379:methods*; D066298:In Vitro Techniques; D008954:Models, Biological; D011829:Radiation Dosage; D011874:Radiometry / Q000379:methods; D015203:Reproducibility of Results; D012542:Scattering, Radiation; D012680:Sensitivity and Specificity; D014463:Ultrasonography / Q000379:methods*; D014783:Viscosity