title: Ultrasonic wave properties of human bone marrow in the femur and tibia.
abstract: Ultrasonic wave properties of human bone marrow obtained in the femur and tibia were measured using an ultrasound pulse technique. The measured frequency range was 4-10 MHz, and the temperature range was 30 °C-40 °C. The sound velocity was 1410 m/s, and the attenuation coefficient was 4.4 dB/cm at 36 °C (10 MHz). These values decreased with temperature. Site dependence and individual differences in elderly human bone marrow were negligible. The slopes of the attenuation coefficient were estimated by a power law. The values of the exponent n were 2.0 (30 °C-38 °C) and 2.3 (40 °C).
authors.affiliation: Laboratory of Ultrasonic Electronics, Doshisha University, 1-3 Tatara-Miyakodani, Kyotanabe, Kyoto 610-0321, Japan.
authors.forename: Satoshi
authors.initials: S
authors.lastname: Kawasaki
authors.affiliation: Laboratory of Ultrasonic Electronics, Doshisha University, 1-3 Tatara-Miyakodani, Kyotanabe, Kyoto 610-0321, Japan.
authors.forename: Ryohei
authors.initials: R
authors.lastname: Ueda
authors.affiliation: Department of Orthopedic Surgery, Daiichi Towakai Hospital, 2-17, Miyano-cho, Takatsuki, Osaka 569-0081, Japan.
authors.forename: Akihiko
authors.initials: A
authors.lastname: Hasegawa
authors.affiliation: Department of Orthopedic Surgery, Daiichi Towakai Hospital, 2-17, Miyano-cho, Takatsuki, Osaka 569-0081, Japan.
authors.forename: Akifumi
authors.initials: A
authors.lastname: Fujita
authors.affiliation: Department of Orthopedic Surgery, Osaka Medical College, 2-7, Daigaku-machi, Takatsuki, Osaka 569-8686, Japan k11028349@gmail.com, bml1110.doshisha@gmail.com, youandmeco@yahoo.co.jp, akifumifujita@yahoo.co.jp, tmihata@yahoo.co.jp, mmatsuka@mail.doshisha.ac.jp, neo@poh.osaka-med.ac.jp.
authors.forename: Teruhisa
authors.initials: T
authors.lastname: Mihata
authors.affiliation: Laboratory of Ultrasonic Electronics, Doshisha University, 1-3 Tatara-Miyakodani, Kyotanabe, Kyoto 610-0321, Japan.
authors.forename: Mami
authors.initials: M
authors.lastname: Matsukawa
authors.affiliation: Department of Orthopedic Surgery, Osaka Medical College, 2-7, Daigaku-machi, Takatsuki, Osaka 569-8686, Japan k11028349@gmail.com, bml1110.doshisha@gmail.com, youandmeco@yahoo.co.jp, akifumifujita@yahoo.co.jp, tmihata@yahoo.co.jp, mmatsuka@mail.doshisha.ac.jp, neo@poh.osaka-med.ac.jp.
authors.forename: Masashi
authors.initials: M
authors.lastname: Neo
mesh_terms: D000368:Aged; D000369:Aged, 80 and over; D001853:Bone Marrow / Q000502:physiology*; D005260:Female; D005269:Femur / Q000502:physiology*; D006801:Humans; D008297:Male; D008875:Middle Aged; D013696:Temperature; D013977:Tibia / Q000502:physiology*; D000069453:Ultrasonic Waves