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Use of wavelet energy for spinal cord vibration analysis during spinal surgery
Author(s) -
Dai Yu,
Zhang Jianxun,
Xue Yuan
Publication year - 2013
Publication title -
the international journal of medical robotics and computer assisted surgery
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.556
H-Index - 53
eISSN - 1478-596X
pISSN - 1478-5951
DOI - 10.1002/rcs.1477
Subject(s) - wavelet , spinal cord , medicine , vibration , spinal surgery , computer science , energy (signal processing) , spinal cord injury , physical medicine and rehabilitation , anesthesia , surgery , acoustics , physics , mathematics , statistics , artificial intelligence , psychiatry
Background An online non‐contact measurement system using a laser displacement sensor was developed for obtaining the vibration amplitude of spinal cord and hard tissue. Methods The discrete wavelet transform was used to extract the distinctive features of tissue vibration signals. The spinal cord and spinal cancellous bone can be discriminated by the comparison of wavelet energy over a characteristic scale. We also derived the integro‐differential equation of motion to describe the spinal cord vibration excited by the motion of bone. Results Experimental results show that the method works well in identifying spinal cord and bone. However, available viscoelastic constants cannot describe the high‐frequency features of spinal cord. Conclusions The examined issue of tissue vibration due to the operation power device is a significant problem. The proposed method can be used by a surgery robot, and then spinal surgery may greatly benefit from the enhanced safety of robotics. Copyright © 2012 John Wiley & Sons, Ltd.