Color spectrum of cupping mark detected by hyperspectral camera:a preliminary observation / 中国针灸

ABSTRACT

<p><b>OBJECTIVE</b>To perform quantitative observation on the color change of local skin after cupping, so as to explore objective and quantitative methods for skin response of cupping.</p><p><b>METHODS</b>Seven health subjects were included. By quantitative meridian cupping instrument, cupping methods with four types of pressures were respectively performed on subjects for 5 min.The spectrum of cupping mark before and after the cupping was collected by hyperspectral camera, and the color change was recorded by digital camera.</p><p><b>RESULTS</b>Before the cupping, the differences of back skin areas were not significant (>0.05), and its average spectrum indicated two peaks at 540-550 nm and 580-590 nm. After cupping with different pressures, spectrum changes of skin were observed. For -0.02 MPa, the most significant reduction was observed at 550 nm (-12.1%,<0.05); for -0.03 MPa, the most significant reduction was observed at 540 nm (-22.1%,<0.05); for -0.04 MPa, the most significant reduction was observed at 610 nm (-26.7%,<0.05); for -0.05 MPa, the most significant reduction was observed at several spectrums (all<0.05).</p><p><b>CONCLUSIONS</b>After cupping with different negative pressures, significant changes of spectrum are observed on skin; for different pressures, the spectrums of the most significant changes are different; the hyperspectral camera could be applied to perform quantitative observation on the color change of local skin.</p>