Long-wavelength near-infrared spectroscopic imaging for in-vivo skin hydration measurements

Optical Fiber Near Infrared Spectroscopy for Skin Moisture Measurement

“…Also in the work, Martin (1995) has experimentally obtained profiles of the measurement depth in diffuse reflectance spectroscopy. Attas et al (2002) have conducted an experiment using near infrared spectroscopic imaging with wavelength between 960nm and 1700nm for in-vivo skin hydration measurements. The system is the combination between a near infrared camera with a liquid-crystal tunable filter (LCTF) to acquire spectral images at multiple narrow wavelength bands.…”

Near‐Infrared In Vivo Spectroscopic Imaging: Biomedical Research and Clinical Applications

“…Hydration Near-IR imaging has a number of useful applications in the area of dermatology including mapping tissue vasculature [27,28], highlighting inflammation [29], and gauging tissue hydration [30][31][32][33][34]. We summarize here an example to demonstrate the latter application.…”

Near infrared imaging for measuring and visualizing skin hydration. A comparison with visual assessment and electrical methods

“…Custom software was written using the LabView programming environment ͑National Instruments, Austin, TX͒ to synchronize the camera and the tunable filter ͑or filter wheel͒ and to provide an interface for images to be acquired and displayed in near-real time. The software was modified from the previous version [10][11][12][13][14] to adapt to the new computer operating system and some changes in the newer camera settings and the filter-wheel controller.…”

“…[10][11][12][13][14] A rectangle area in the center of the test site was used to obtain the average pixel intensity, which is reported as the NIR score for the test site. The change-from-baseline ͑CFB͒ scores were obtained by subtracting the base line NIR score from the scores of the post-product application.…”

“…It has recently been shown to be able to distinguish between different levels of skin hydration under treatments with a skin moisturizer and artificial dehydration using a solvent. [10][11][12][13][14] The infrared imaging technique does not provide depthresolved information on skin hydration and instead, measures the overall skin hydration. It is well known that near infrared light penetrates deep into the skin, although the depth of penetration is greatly reduced at the water absorption bands compared to that at other wavelengths.…”