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英文誌(2004-)

Journal of Medical Ultrasonics

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1996 - Vol.23

Vol.23 No.09

Original Article(原著)

(0643 - 0650)

軟組織での反射と減衰を考慮した超音波反射法による骨の音響インピーダンスの計測

Measurement of Acoustic Impedance of Bone by Considering Reflection and Attenuation of Soft Tissue Using the Ultrasonic Reflection Method

浅井 仁, 金井 浩, 中鉢 憲賢

Hitoshi ASAI, Hiroshi KANAI, Noriyoshi CHUBACHI

東北大学工学部電気工学科

Department of Electrical Engineering Tohoku University Faculty of Engineering

キーワード : Acoustic impedance, Osteoporosis, Reflection coefficient, Ultrasonic reflection method

A recently proposed system for diagnosing osteoporosis by measuring the acoustic impedance of bone fails to provide the necessary step of taking reflection loss at the interface between the bone and the soft tissue as well as propagation loss in the soft tissue into account. Here we propose an ultrasonic reflection method that compensates for these losses. Preliminary experiments using PMMA/Bakelite and rubber/Bakelite composite models indicate the validity of this method. Values obtained in vivo with and without compensation differed significantly.