17 December 2012 Visualization of peripheral vasodilative indices in human skin by use of red, green, blue images
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Abstract
We propose a method to visualize the arterial inflow, the vascular resistance, and the venous capacitance in the skin tissue from red, green, blue (RGB) digital color images. The arterial inflow and the venous capacitance in the skin tissue are visualized based on an increase in the rate of change in the total blood concentration and the change of the total blood concentration during upper limb occlusion at a pressure of 50 mmHg. The resultant arterial inflow with the measured mean arterial pressure also provides an image of the vascular resistance in human skin. The arterial inflow, the vascular resistance, and the venous capacitance acquired by the method are well correlated with those obtained from the conventional strain-gauge plethysmograph. The correlation coefficients R between the estimated values by the method and the measurements by the SPG are calculated to be 0.83 (P<0.001) for the arterial inflow, 0.77 (P<0.01) for the vascular resistance, and 0.77 (P<0.01) for the venous capacitance. The arterial inflow and the venous capacitance in the skin tissue are significantly higher in active subjects compared with the sedentary subjects, whereas the vascular resistance was significantly lower in the active subjects compared with the sedentary subjects. The results of the present study indicate the possibility of using the proposed method for evaluating the peripheral vascular functions in human skin.
© 2012 Society of Photo-Optical Instrumentation Engineers (SPIE)
Izumi Nishidate, Izumi Nishidate, Noriyuki Tanaka, Noriyuki Tanaka, Tatsuya Kawase, Tatsuya Kawase, Takaaki Maeda, Takaaki Maeda, Tomonori Yuasa, Tomonori Yuasa, Yoshihisa Aizu, Yoshihisa Aizu, Tetsuya Yuasa, Tetsuya Yuasa, Kyuichi Niizeki, Kyuichi Niizeki, } "Visualization of peripheral vasodilative indices in human skin by use of red, green, blue images," Journal of Biomedical Optics 18(6), 061220 (17 December 2012). https://doi.org/10.1117/1.JBO.18.6.061220 . Submission:
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