by Peter Rowan, MSc, FRCP (General Practitioner)a, Michael Hill, PhD, FRCP (Physician)b, G.A. Gresham, Sc.D, FRCPath (Professor)c, Edward Goodall, PhD, NTF (Senior Lecturer)d, Tara Moore, MSc, PhD (Fellow Professor)d
"The results of photographing subjects over 6 months demonstrated that the median time the bruises persisted in both groups was approximately between 18 and 19 days. There was no statistically significant difference between groups of bruises photographed with both the infrared digital camera that had been adapted to capture only infrared light, and with the standard camera which had the same lens fitted to it.The two groups of photographs of bruises imaged at the same time with the two cameras were not significantly different with regard to what skin changes could be detected. The use of the near infrared spectrum, with wavelengths that are longer than the human eye can detect, did not reveal significant evidence of bruising after it had faded from view to both the human eye and to a standard camera."