Noninvasive Detection of Skin Moisture Content Based on Spatially Offset Raman Spectroscopy

Subject	Relative water content（%）of 10 palm positions
No.	A1	A2	A3	A4	A5	A6	A7	A8	A9	A10
1	60	60	60	56	59	60	58	58	55	55
2	58	64	64	69	66	58	65	58	58	56
3	60	58	55	53	53	58	58	60	60	56
4	56	59	55	55	55	58	58	60	60	56
5	48	50	46	47	47	55	56	55	53	53
6	56	53	53	53	50	58	58	55	53	48
7	68	66	69	69	64	69	72	65	66	66

Table 2. Results of electrical conductivity methods for subjects 1-7（%）

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Table 2. Results of electrical conductivity methods for subjects 1-7（%）

Subject	Relative water content（%）of 10 palm positions
No.	A1	A2	A3	A4	A5	A6	A7	A8	A9	A10
1	57	58	57	53	56	57	55	55	53	53
2	55	61	60	65	57	56	63	54	57	54
3	58	56	53	50	51	59	60	58	54	52
4	54	57	53	52	52	56	57	58	58	55
5	45	48	43	45	42	53	55	52	50	41
6	54	50	50	49	38	57	53	49	47	34
7	72	71	67	71	72	66	75	59	62	61

Table 3. Interclass correlation coefficient
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Table 3. Interclass correlation coefficient
ICC 95% confidence interval
Lower limit Upper limit
Single measurement 0.889 0.827 0.930
Average measurement 0.941 0.906 0.964

Table 4. ICC for different spatially offsets
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Table 4. ICC for different spatially offsets
Spatially offset/μm Relative strength of water ICC for different spatially offsets
200 0.122 0.612
300 0.101 0.889
500 0.023 0.316
1 000 0.050 0.544

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Rongsui YUAN, Zhiqiang WU, Rongzhi NIE, Wenting ZHONG, Keqin ZHANG. Noninvasive Detection of Skin Moisture Content Based on Spatially Offset Raman Spectroscopy[J]. Acta Photonica Sinica, 2023, 52(9): 0930003

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