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Technical Brief

A Wavelet Transform-Based Approach for Detecting Postural Transitions in Patients Following Anterior Cruciate Ligament Reconstruction1

[+] Author and Article Information
Sadra Hemmati, Eric Wade

Department of Mechanical, Aerospace, and
Biomedical Engineering,
University of Tennessee,
Knoxville, TN 37996

DOI: 10.1115/1.4033764Manuscript received March 1, 2016; final manuscript received March 17, 2016; published online August 1, 2016. Editor: William Durfee.

J. Med. Devices 10(3), 030941 (Aug 01, 2016) (2 pages) Paper No: MED-16-1090; doi: 10.1115/1.4033764 History: Received March 01, 2016; Revised March 17, 2016

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References

Fischer, D. A. , Tewes, D. P. , Boyd, J. L. , Smith, J. P. , and Quick, D. C. , 1998, “ Home Based Rehabilitation for Anterior Cruciate Ligament Reconstruction,” Clin. Orthop. Relat. Res., 347, pp. 194–199. [CrossRef] [PubMed]
Godfrey, A. , Bourke, A. K. , Olaighin, G. M. , Van De Ven, P. , and Nelson, J. , 2011, “ Activity Classification Using a Single Chest Mounted Tri-Axial Accelerometer,” Med. Eng. Phys., 33(9), pp. 1127–1135. [CrossRef] [PubMed]
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Chau, T. , 2001, “ A Review of Analytical Techniques for Gait Data—Part 2: Neural Network and Wavelet Methods,” Gait Posture, 13(2), pp. 102–120. [CrossRef] [PubMed]
Najafi, B. , Aminian, K. , Paraschiv-Ionescu, A. , Loew, F. , Büla, C. J. , and Robert, P. , 2003, “ Ambulatory System for Human Motion Analysis Using a Kinematic Sensor: Monitoring of Daily Physical Activity in the Elderly,” IEEE Trans. Biomed. Eng., 50(6), pp. 711–723. [CrossRef] [PubMed]
Najafi, B. , Aminian, K. , Loew, F. , Blanc, Y. , and Robert, P. , 2002, “ Measurement of Stand-Sit and Sit-Stand Transitions Using a Miniature Gyroscope and Its Application in Fall Risk Evaluation in the Elderly,” IEEE Trans. Biomed. Eng., 49(8), pp. 843–851. [CrossRef] [PubMed]
Ismail, A. R. , and Asfour, S. S. , 1999, “ Discrete Wavelet Transform: A Tool in Smoothing Kinematic Data,” J. Biomech., 32(3), pp. 317–321. [CrossRef] [PubMed]
Wachowiak, M. P. , Rash, G. S. , Quesada, P. M. , and Desoky, A. H. , 2000, “ Wavelet-Based Noise Removal for Biomechanical Signals: A Comparative Study,” IEEE Trans. Biomed. Eng., 47(3), pp. 360–368. [CrossRef] [PubMed]

Figures

Grahic Jump Location
Fig. 1

The waist sensor location and axis used for the WT-based approach

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Fig. 2

Raw gyroscope data from a single task set

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Fig. 3

Cross-correlation signal based on stand-to-sit prototype signal

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