Abstract
Special computer-aided equipment was designed for measurement of biomechanical characteristics of lower part of the spine (L1-L5). When the stress is applied, it is necessary to observe the shift of the sample elements, together with measurement of the spine rigidity. This shift is determined with the help of circular targets fitted to the appropriate vertebra. The targets, illuminated by lamp or laser light, are monitored and their digitalized images are scanned by CCD camera is stored as computer media. The two dimensional Fourier transform of the digital optical signal is obtained by the fast Fourier transform algorithm. The period and direction of the interference fringes determine the size and the direction of the sample shift.
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References
D.S. Brodke, J.C. Dick, D.N. Kunz et al.: „Posterior Lumbar Interbody Fusion”, Špine, Vol. 22, (1997), pp. 26–31.
P.A. Glazer, O. Colliou, S.M. Klish et al.: „Biomechanical Analysis of Multilever Fixation Methods in the Lumbar Spine”, Špine, Vol. 22, (1997), pp. 171–182.
G.O. Saidi, N. Kimio, M.P. Manohar et al.: „Transforaminal Posterior Decompressions of the Lumbar Spine”, Špine, Vol. 22, (1997), pp. 1690–1695.
M. Deduchi, B.C. Chang, K. Sato et al.: „Biomechanical Evaluation of Translaminar Facet Joint Fixation”, Špine, Vol. 23, (1998), pp. 1307–1313.
Y. Shono, K. Kaneda, K. Abumi et al.: „Stability of Posterior Spinal Instrumentation and Its Effects on Adjacent Motion Segments in the Lumbosacral Spine”, Špine, Vol. 23, (1998), pp. 1550–1558.
K.A. Stenson: „A Review of Speckle Photography and Interferometry”, Opt. Rng., Vol. 14, (1975), pp. 482–489.
J. Keprt, L. Bartoněk: „Measurement of Small Deformations by Laser Speckle Interferometry”, Acta UP Fac. Rer. Nat., Vol. 38, (1999), pp. 115–125.
L. Bartoněk, J. Keprt: „Computerized Evaluation Optical Measuring Thin Films by the Help of Michelson Interferometer”, Materials Engineering, Vol. 9, (2002), pp. 27–34.
L. Jaroslavskij, I. Bajla: Metódy a systémy čislicového spracovania obrazov, Alfa, Bratislava, 1989, (in Slovak)
B. Zaratian: Visual C++6.0, Computer Press, Praha, 1999.
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Bartoněk, L., Keprt, J., Charamza, J. et al. Computer aided measurement of biomechanical characteristics of cadaverous lumbar spines. centr.eur.j.phys. 2, 504–510 (2004). https://doi.org/10.2478/BF02476428
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DOI: https://doi.org/10.2478/BF02476428