A base-sequence-modulated golay code improves the excitation and measurement of ultrasonic guided waves in long bones

2012 ◽  
Vol 59 (11) ◽  
Author(s):  
Xiaojun Song ◽  
Dean Ta ◽  
Weiqi Wang
Keyword(s):  
Guided Waves ◽  
Ultrasonic Guided Waves ◽  
Base Sequence ◽  
Long Bones ◽  
Golay Code

Phase velocity estimation technique based on adaptive beamforming for ultrasonic guided waves propagating along cortical long bones

2017 ◽  
Vol 56 (7S1) ◽  
pp. 07JF06 ◽  
Author(s):  
Shigeaki Okumura ◽  
Vu-Hieu Nguyen ◽  
Hirofumi Taki ◽  
Guillaume Haïat ◽  
Salah Naili ◽  
...  
Keyword(s):  
Phase Velocity ◽  
Guided Waves ◽  
Adaptive Beamforming ◽  
Velocity Estimation ◽  
Ultrasonic Guided Waves ◽  
Long Bones ◽  
Estimation Technique

Warped frequency transform analysis of ultrasonic guided waves in long bones

2010 ◽  
Author(s):  
L. De Marchi ◽  
E. Baravelli ◽  
K. Xu ◽  
D. Ta ◽  
N. Speciale ◽  
...  
Keyword(s):  
Guided Waves ◽  
Ultrasonic Guided Waves ◽  
Long Bones

Warped signal dictionaries for the analysis of ultrasonic guided waves in long bones

2009 ◽  
Author(s):  
L. De Marchi ◽  
Kailiang Xu ◽  
De-an Ta ◽  
A. Marzani ◽  
S. Caporale ◽  
...  
Keyword(s):  
Guided Waves ◽  
Ultrasonic Guided Waves ◽  
Long Bones

scholarly journals Transverse and Oblique Long Bone Fracture Evaluation by Low Order Ultrasonic Guided Waves: A Simulation Study

2017 ◽  
Vol 2017 ◽  
pp. 1-10 ◽  
Author(s):  
Ying Li ◽  
Dan Liu ◽  
Kailiang Xu ◽  
Dean Ta ◽  
Lawrence H. Le ◽  
...  
Keyword(s):  
Fracture Healing ◽  
Bone Fracture ◽  
Guided Waves ◽  
Guided Wave ◽  
Ultrasonic Guided Waves ◽  
Fdtd Simulation ◽  
Long Bones ◽  
Fracture Angle ◽  
Wave Modes ◽  
Low Order

Ultrasonic guided waves have recently been used in fracture evaluation and fracture healing monitoring. An axial transmission technique has been used to quantify the impact of the gap breakage width and fracture angle on the amplitudes of low order guided wave modesS0andA0under a 100 kHz narrowband excitation. In our two dimensional finite-difference time-domain (2D-FDTD) simulation, the long bones are modeled as three layers with a soft tissue overlay and marrow underlay. The simulations of the transversely and obliquely fractured long bones show that the amplitudes of bothS0andA0decrease as the gap breakage widens. Fixing the crack width, the increase of the fracture angle relative to the cross section perpendicular to the long axis enhances the amplitude ofA0, while the amplitude ofS0shows a nonmonotonic trend with the decrease of the fracture angle. The amplitude ratio between theS0andA0modes is used to quantitatively evaluate the fracture width and angles. The study suggests that the low order guided wave modesS0andA0have potentials for transverse and oblique bone fracture evaluation and fracture healing monitoring.

ULTRASONIC GUIDED WAVES FOR THE INSPECTION OF ADHESIVELY BONDED JOINTS

2008 ◽  
Author(s):  
Padma Kumar Puthillath ◽  
Fei Yan ◽  
Clifford J. Lissenden ◽  
Joseph L. Rose ◽  
Donald O. Thompson ◽  
...  
Keyword(s):  
Guided Waves ◽  
Ultrasonic Guided Waves ◽  
Bonded Joints ◽  
Adhesively Bonded ◽  
Adhesively Bonded Joints
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