PMID: 20632927Jul 17, 2010Paper

An optical method for investigation of thickness of damaged articular cartilage

Eklem hastalıkları ve cerrahisi = Joint diseases & related surgery
Coşar KaragölMurat Canpolat

Abstract

The aim of this study was to develop an optical system to measure damaged cartilage thickness in-vivo and real time using an optical fiber probe and conducting ex-vivo elastic light-scattering spectroscopy experiments on different thicknesses of damaged calf's patella cartilage. An elastic light-scattering spectroscopy system was assembled with a miniature UV-VIS spectrometer, halogen-tungsten light source, laptop and optical fiber probe. Elastic light-scattering spectra were taken on the control and damaged calf's patella cartilages of 40 samples. The samples were grouped into four; in the first group cartilages were not damaged, in the 2nd, 3rd and 4th groups cartilage thickness was reduced approximately 25%, 50% and 100% respectively. The probe consisted of six fibers; one for light delivery and the other five to detect diffuse back-reflected light from the cartilage. Diameter of the fibers was 400 microm, and distance of the detector fibers from the source fibers were 0.8, 1.6, 2.4, 3.2, 4.0 mm. Our results showed a correlation between cartilage thickness and hemoglobin absorption in the wavelength range of 500-600 nm. We defined an absorption index using the spectral data of the diffuse back-reflected light to make a corre...Continue Reading

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