Non-contact evaluation for articular cartilage using ultrasound
Non-contact evaluation for articular cartilage using ultrasound
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DOI：
10.1299/jsmea.49.242
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发表时间：
2006-04-01
期刊：
影响因子：
--
通讯作者：
Saito, T
中科院分区：
文献类型：
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作者：
Mori, K;Nakagawa, Y;Saito, T
在骨科领域，各种治疗关节软骨缺损的新方法不断涌现，如自体骨软骨移植。随着这些治疗方法的推广，骨科医生开始关注恢复关节软骨的力学性能。这些治疗前后关节软骨的定量评价为骨科医生改进这些治疗方法和开发新的治疗方法提供了重要信息。我们一直在研究关节镜下关节软骨的非接触超声评价。本文假设超声评价取决于软骨中的胶原纤维。采用酶法降解软骨表面胶原纤维。测量了退化对声速、衰减系数和信号强度的影响，信号强度是从所提出的方法计算的软骨刚度的指标。通过数值分析，明确了超声参数与软骨特性之间的关系。实验和数值结果表明，该方法可以扩展到临床领域的软骨疾病的敏感性评估。
In orthopedic field, various new treatments of articular cartilage defect, for example autogenous osteochondral grafts, have been developed. With the spread of these treatments, orthopedists began to focus on the mechanical properties of recovered articular cartilage. The quantitative evaluation of articular cartilage before and after these treatments gives orthopedists the important information to improve these treatments and develop new treatments. We have been investigating the non-contact ultrasonic evaluation for articular cartilage under arthroscopy. In this paper, it was hypothesized that the ultrasonic evaluation depended on the collagen fiber in cartilage. The enzymatically degradation of collagen fiber in cartilage surface was performed. The effect of the degradation on sound velocity, attenuation coefficient and signal intensity, which is the index of cartilage stiffness calculated from the proposed method, was measured. The numerical analysis was performed to clear the relation between the cartilage character and ultrasonic parameters. Experimental and numerical results suggest that the present method can be expanded the sensitive evaluation for cartilage disease in clinical field.