通过共振超声光谱法和透射超声对牛骨进行研究。

Investigation of bovine bone by resonant ultrasound spectroscopy and transmission ultrasound.

作者信息

Lee T, Lakes R S, Lal A

机构信息

Orthopedic Biomechanics Laboratory, Beth Israel Deaconess Medical Center, Harvard Medical School, 330 Brookline Avenue, RN 115, Boston, MA 02215, USA.

出版信息

Biomech Model Mechanobiol. 2002 Oct;1(2):165-75. doi: 10.1007/s10237-002-0015-y.

DOI:10.1007/s10237-002-0015-y

PMID:14595548

Abstract

The method of resonant ultrasonic spectroscopy (RUS) was evaluated for bovine bone and compared with the traditional wave transmission ultrasound method. In RUS, the resonance structure of a cubic or rectangular specimen is scanned. For some low-damping materials, a single measurement yields sufficient resonant frequencies to determine all of the anisotropic elastic constants. Bone has a high viscoelastic damping at ultrasonic frequency. Consequently, resonance peaks of a cubic specimen tend to overlap. Therefore, the usual RUS method must be modified for application to bone; even so, one cannot obtain all the elastic constants. Concurrent studies with transmission ultrasound were conducted. Results were used to generate a map of the elastic moduli vs position along the bone axis. Stiffness was greatest in the mid part of the bovine femur.

摘要

对牛骨进行了共振超声光谱法（RUS）评估，并与传统的波传播超声法进行了比较。在RUS中，对立方体形或矩形试样的共振结构进行扫描。对于一些低阻尼材料，单次测量就能产生足够的共振频率来确定所有各向异性弹性常数。骨头在超声频率下具有高粘弹性阻尼。因此，立方体形试样的共振峰往往会重叠。所以，常规的RUS方法必须进行修改才能应用于骨头；即便如此，也无法获得所有的弹性常数。同时进行了与透射超声相关的研究。结果被用于生成弹性模量相对于沿骨轴位置的图谱。牛股骨中部的刚度最大。