Spectrocolorimetric evaluation of human articular cartilage

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Presentation transcript:

Spectrocolorimetric evaluation of human articular cartilage Y. Ishimoto, K. Hattori, H. Ohgushi, K. Uematsu, Y. Tanikake, Y. Tanaka, Y. Takakura Osteoarthritis and Cartilage Volume 17, Issue 9, Pages 1204-1208 (September 2009) DOI: 10.1016/j.joca.2009.02.014 Copyright © 2009 Osteoarthritis Research Society International Terms and Conditions

Fig. 1 Human cartilage samples excised from the posterior condyle of the femur. The cartilage samples were graded macroscopically using the Outerbridge classification as grade 1 (A), grade 2 (B), grade 3 (C), grade 4 (D). Open circles (4mm in diameter) indicate the measurement area of macroscopic, spectrocolorimetoric and histological assessment. Osteoarthritis and Cartilage 2009 17, 1204-1208DOI: (10.1016/j.joca.2009.02.014) Copyright © 2009 Osteoarthritis Research Society International Terms and Conditions

Fig. 2 Box and whisker plots of the L*, a*, b* values (A – C) and the Y/R SRP values (D). The Y/R SRP was calculated using the following equation: Y/R SRP=Spectral reflectance ratio at a wavelength of 580nm (yellow as the cartilage color)/Spectral reflectance ratio at a wavelength of 680nm (red as the erosive bone color)×100. Each box represents the 25th and 75th percentiles. Lines inside the boxes represent the median. The vertical bars indicate the range. Osteoarthritis and Cartilage 2009 17, 1204-1208DOI: (10.1016/j.joca.2009.02.014) Copyright © 2009 Osteoarthritis Research Society International Terms and Conditions

Fig. 3 Spectral reflectance curves of human articular cartilage specimens. Osteoarthritis and Cartilage 2009 17, 1204-1208DOI: (10.1016/j.joca.2009.02.014) Copyright © 2009 Osteoarthritis Research Society International Terms and Conditions

Fig. 4 Scatter plot of the L*, a*, b* values (A – C) and the Y/R SRP values (D). The Y/R SRP was calculated using the following equation: Y/R SRP=Spectral reflectance ratio at a wavelength of 580nm (yellow as the cartilage color)/Spectral reflectance ratio at a wavelength of 680nm (red as the erosive bone color)×100. Osteoarthritis and Cartilage 2009 17, 1204-1208DOI: (10.1016/j.joca.2009.02.014) Copyright © 2009 Osteoarthritis Research Society International Terms and Conditions