Figure 4
From: Ultrasound-modulated optical glucose sensing using a 1645 nm laser
(a) Comparison of modulation depth and diffuse transmittance of various glucose concentrations. The error bars represent ± 1 standard deviation. The dashed lines and the shaded areas represent fitted curves of feature value to glucose concentrations and their 95% confidence interval. (b) Predicted glucose concentration obtained from UOS measurements of glucose solutions. (c) Close-up of measurement (a) for a 400 mg/dL glucose concentration. The dashed line represents the fitted curve of modulation depths to glucose concentrations. (d) Clarke’s error grid analysis of the predicted glucose concentration obtained from UOS measurements of glucose solutions. 1 K = 1,000; UOS ultrasound-modulated optical sensing, Md modulation depth, Td diffuse transmittance.
