Year
Month
(Peer-Reviewed) Assessment of cortical bone fatigue using coded nonlinear ultrasound
Duwei Liu 刘度为 ¹, Boyi Li 李博艺 ², Dongsheng Bi 毕东生 ¹, Tho N. H. T. Tran ², Yifang Li 李义方 ¹ ³, Dan Liu 刘丹 ¹, Ying Li 李颖 ¹, Dean Ta 他得安 ¹ ²
¹ Center for Biomedical Engineering, School of Information Science and Technology, Fudan University, Shanghai 200433, China
中国 上海 复旦大学信息科学与工程学院生物医学工程中心
² Academy for Engineering and Technology, Fudan University, Shanghai 200433, China
中国 上海 复旦大学工程与应用技术研究院
³ Human Phenome Institute, Fudan University, Shanghai 200433, China
中国 上海 复旦大学人类表型组研究院
Chinese Physics B, 2021-06-23
Abstract

Bone fatigue accumulation is a factor leading to bone fracture, which is a progressive process of microdamage deteriorating under long-term and repeated stress. Since the microdamage of the early stage in bone is difficult to be investigated by linear ultrasound, the second harmonic generation method in nonlinear ultrasound technique is employed in this paper, which is proved to be more sensitive to microdamage.

To solve the deficiency that the second harmonic component is easily submerged by noise in traditional nonlinear measurement, a weighted chirp coded sinusoidal signal was applied as the ultrasonic excitation, while pulse inversion is implemented at the receiving side. The effectiveness of this combination to improve the signal-to-noise ratio has been demonstrated by in vitro experiment. Progressive fatigue loading experiments were conducted on the cortical bone plate in vitro for microdamage generation.

There was a significant increase in the slope of the acoustic nonlinearity parameter with the propagation distance (increased by 8% and 24% respectively) when the bone specimen was at a progressive level of microdamage. These results indicate that the coded nonlinear ultrasonic method might have the potential in diagnosing bone fatigue.
Assessment of cortical bone fatigue using coded nonlinear ultrasound_1
Assessment of cortical bone fatigue using coded nonlinear ultrasound_2
Assessment of cortical bone fatigue using coded nonlinear ultrasound_3
Assessment of cortical bone fatigue using coded nonlinear ultrasound_4
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