Multispectral Imaging for Erythema Identification
A Landmarc research team developed, and tested this patent-pending technology to be used in a clinically-affordable and portable device to identify erythema and deep tissue injury before they progress, especially in people with darker skin tones. Enhancement of clinician visual assessment of at-risk skin can reduce healthcare costs and improve patient care by preventing the occurrence of pressure ulcers, treatment of which can cost up to $40,000 per ulcer.
Technical Approach The team took multi-spectral images of induced erythema on human subjects, then analyzed the 12 samples per subject using 50 nm bandwidth filters from 400 nm to 950 nm.   Utilizing their knowledge of chromophores (such as oxy- and deoxy-hemobglobin and melanin), the team was then able to develop algorithms to enhance the erythema image by means of  a combination of 2-3 wavebands
Project Results The technology highlights erythema with a combination of 3 wavebands.    (Right) Erythema seen with naked eye.   (Far Right) Erythema imaging using the Landmarc  technology.   (Bottom Left) Image samples from erythema study.   (Bottom Right) Technology enhances  erythema identification.