Excitation of Ultrasonic Guided Waves In Bone Plates Using A Phased Array System

• Author / Creator

  Nguyen, Kim-Cuong T

• Ultrasonic guided waves have been exploited to study long bones using the
  axial transmission technique. The application of phased array (PA) technology
  to bone study is uncommon and the conventional technique involves the
  employment of a pair of angled beam transducers, which is laborious. In
  this thesis, we investigated the use of a commercial non-medical ultrasonic
  PA system to study Lamb waves in Plexiglas and bovine bone plates using a
  single array probe and two array probes. Data acquired by the single probe
  was deteriorated by the presence of crosstalk. We developed a Radon-based
  adaptive crosstalk cancellation algorithm to remove the crosstalk and recover
  the signals. Using the two array probes, we studied beam steering to preferentially
  excite guided modes for bone assessment. The results have demonstrated
  the advantages of the PA system over the conventional single-emitter-singlereceiver
  system in terms of accuracy, speed, and patient comfort, if used in
  clinical settings.

• Subjects / Keywords

  • Guided waves
  • Phased array
  • Bone plate
  • Excitation

• Graduation date

  Fall 2013

• Type of Item

  Thesis

• Degree

  Master of Science

• DOI

  https://doi.org/10.7939/R39Z90P53

• License

  This thesis is made available by the University of Alberta Libraries with permission of the copyright owner solely for non-commercial purposes. This thesis, or any portion thereof, may not otherwise be copied or reproduced without the written consent of the copyright owner, except to the extent permitted by Canadian copyright law.