The Effect of Physical Loading on Bone Broadband Ultrasound Attenuation  

作　　者：LIU Cheng-rui NIU Hai-jun WANG Ling FAN Yu-bo LI De-yu 

机构地区：[1]Key Laboratory for Biomechanics and Mechanobiology of Ministry of Education, School of Biological Science and Medical Engineering, Beihang University

出　　处：《Chinese Journal of Biomedical Engineering(English Edition)》2015年第3期134-138,共5页中国生物医学工程学报（英文版）

摘　　要：Objective: Physical loading changes bone microstructure and may influence quantitative ultrasound(QUS) parameters. This study aims at evaluating the effect of physical loading on bone QUS measurement. Methods: Ten fresh bovine bone specimens were studied, which were scanned by a micro-CT and the density and structure parameters were calculated. The QUS measurement was performed when specimens subjected to loading, which changed from 0 to 1,000 N with the step of 100 N. Statistical analysis was performed to evaluate the difference between n BUA measured with and without loading, and the relationship between n BUA and the parameters measured by micro-CT. Results: While the loading exerted on bone lugher than 200 N, the measured nBUA significantly higher than n BUA measured without loading. With the increasing of loading, which exerted on bone, the values of nBUA also increased. A new parameter, the slope of the linearity fitted curve of nBUA values measured under different loading conditions, was introduced to evaluate BMD. The correlation coefficient between the slope and BMD is-0.869(P=0.001). Conclusion: Physical loading substantially influences bone QUS measurement. QUS measurement performed under loading condition may be a new ultrasound method for osteoporosis diagnosis.Objective： Physical loading changes bone microstructure and may influ- ence quantitative ultrasound （QUS） parameters. This study aims at evaluating the effect of physical loading on bone Qus measurement. Methods： Ten fresh bovine bone specimens were studied, which were scanned by a micro-CT and the density and structure parameters were calculated. The QUS measurement was performed when specimens sub- jected to loading, which changed from 0 to 1,000 N with the step of 100 N. Statistical analysis was performed to evaluate the difference between nBUA measured with and without loading, and the relationship between nBUA and the parameters measured by micro-CT. Results： While the loading exerted on bone lugher than 200 N, the measured nBUA significantly higher than nBUA measured without loading. With the increasing of loading, which exerted on bone, the valnes of nBU A also increased. A new parameter, the slope of the linearity fitted curve of nBUA values measured under different loading conditions, was introduced to evaluale BMD. The correlation coefficient between the slope and BMD is -0.869 （P=0.001）. Conclusion： Physical loading substantially influences bone Qus measurement. QUS measurement performed nnder loading condition may be a new ultrasound method for osteoporosis diagnosis.

关 键 词：qsteoporosis physical loading BONE QUS nBUA 

分 类 号：R318[医药卫生—生物医学工程]