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Your search keyword '"Aizu, Yoshihisa"' showing total 15 results
Start Over Author "Aizu, Yoshihisa" Journal journal of biomedical optics
15 results on '"Aizu, Yoshihisa"'

5. Special series guest editorial: Biomedical Imaging and Sensing III

Author

Yatagai, Toyohiko, Matoba, Osamu, Aizu, Yoshihisa, Awatsuji, Yasuhiro, and Luo, Yuan

Subjects
Two photon imaging, Microscopy, Optical coherence tomography, Biosensing, Holography, Imaging systems, Digital holography, Sensing systems, Biomedical optics, Volume holography
Abstract

Guest editors Toyohiko Yatagai, Osamu Matoba, Yoshihisa Aizu, Yasuhiro Awatsuji, and Yuan Luo introduce the articles in the Special Series on Biomedical Imaging and Sensing.

Published
2021

15. Visualization of peripheral vasodilative indices in human skin by use of red, green, blue images.

Author

Nishidate I, Tanaka N, Kawase T, Maeda T, Yuasa T, Aizu Y, Yuasa T, and Niizeki K

Subjects
Algorithms, Arterial Pressure, Arteries pathology, Color, Forearm blood supply, Humans, Laser-Doppler Flowmetry, Light, Plethysmography, Pressure, Regional Blood Flow, Regression Analysis, Vascular Resistance, Skin blood supply, Skin pathology, Vasodilation
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.

Published
2013
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