Laboratoire d'Imagerie Paramétrique, UPMC Univ Paris 06, CNRS UMR 7623, 15 rue de l'École de Médecine, F-75006 Paris, France.
J Acoust Soc Am. 2012 Apr;131(4):EL289-94. doi: 10.1121/1.3687016.
The femoral neck cortical shell was recently demonstrated to act like a waveguide for circumferential waves. Femoral neck assessment with ultrasound could be enhanced by guided waves measurement. In this study, the decomposition of the time reversal operator (DORT) method is used to measure the phase velocities of circumferential guided modes in a circular tube with dimensions characteristic of femoral neck. The tube is made of a bone-mimicking material. Five guided modes are obtained and compared to theoretical predictions. The work substantiates the feasibility of measuring guided waves in a relatively thick tube of attenuating material with the DORT method.
最近的研究表明，股骨颈皮质骨壳可以作为周向导波的波导。通过导波测量，超声对股骨颈的评估可以得到增强。在这项研究中，我们使用时间反转算子（DORT）方法的分解来测量具有股骨颈特征尺寸的圆管中周向导波的相速度。该管由一种类似骨骼的材料制成。我们得到了五个导波模式，并与理论预测进行了比较。这项工作证实了使用 DORT 方法在具有衰减材料的相对较厚管中测量导波的可行性。
