Analysis of the Spectral Characteristics of Pure Moxa Stick Burning by Hyperspectral Imaging and Fourier Transform Infrared Spectroscopy

Figure 4

Changes of temperature, blood perfusion (BP), and oxygen saturation (SaO₂) in BL23 acupoint skin before and after MS moxibustion. (a) Visualization of infrared thermal imaging for right BL23; (a-1) before moxibustion, (a-2) at 10 minutes after moxibustion, (a-3) at 15 minutes after stopping moxibustion, and (a-4) at 30 minutes after stopping moxibustion. The black spot indicated spine. The red circle indicated the location of right BL23. (b) Visualization of laser speckle perfusion imaging (LSPI) for right BL23; (b-1) before moxibustion, (b-2) at 10 minutes after moxibustion, (b-3) at 15 minutes after stopping moxibustion, and (b-4) at 30 minutes after stopping moxibustion. (c) Quantification of temperature increment among groups. (d) Quantification of BP increment among groups. (e) Quantification of SaO₂ increment among groups. versus mox. for 10 min. Data was the difference between BL23 BP of each time point and before moxibustion which are (one-way ANOVA with LSD’s two groups comparison test).

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