1
David P DeWitt, Robert E Hannemann, John F Wiechel: Method for determining bilirubin concentration from skin reflectance. Purdue Research Foundation, John R Nesbitt, June 14, 1977: US04029085 (65 worldwide citation)

A method is disclosed for determining the bilirubin concentration in the blood serum of a person from measurement of the spectral reflectance of the skin. The disclosed method detects the severity of jaundice, a common neonatal condition, and enables determination of the type of treatment regimen ne ...


2
David P DeWitt, Robert E Hannemann, Barrett F Robinson, Edward J Hanley: Method for evaluation of erythema utilizing skin reflectance measurements. Purdue Research Foundation, O Rourke & Harris, January 3, 1984: US04423736 (52 worldwide citation)

A method is disclosed for evaluating erythema utilizing skin reflection measurements. By collecting and analyzing data representative of both normal and erythematous skin utilizing reflectance spectra within a range of 400 to 700 nm, distinctive spectral features of erythema have been identified. A ...