![]() ![]() The estimates were only correct for 24 of the bruises, with the estimates being wrong for 20 of the bruises. In this article a blind observer estimated the age of 50 bruises. Several authors have discussed the problem of determining the age of bruises, for example "Estimation of the age of bruising", Arch Dis Child, 74(1): 53- 55, 1996, Stephenson & Bialas. The uncertainty in the result is therefore comparatively large. However, interpretation of the finding is purely empirical and relies strongly of the skills and experience of the observer, and might be disturbed by factors like e.g. ![]() Bruises may be observed directly or photographs may be inspected. Visual assessment is most commonly used to estimate the age of a bruise, as disclosed for example in "The aging of bruises a review and study of the colour changes with time", Forensic Sci Int, 50:227-238, 1991, Langlois & Gresham. DescriptionÄetermining the age of injuries on a victim's body is an important aspect of forensic medicine, for example in cases of abuse. Finally, the measured spectrum and simulated spectra are compared in order to estimate the age of the bruise. The computer (3) then simulates reflectance spectra at different times after injury using the photon transport model. The computer (3) also estimates haemoglobin and bilirubin distributions at different times after injury. The computer (3) calculates the various parameters required for the photon transport model from the reflectance spectra. The integrating sphere (2) is placed opposite the skin (1) and collects reflectance spectra of both normal and bruised skin. Such a method can be implemented using an integrating sphere (2) and a suitably programmed computer (3). The age of the haematoma is found by comparing the measured and simulated reflectance spectra and determining the time that gives the best fit. The photon transport model also takes various input parameters calculated from the measured spectra such as melanin content and blood oxygenation. A photon transport model is then used to simulate reflectance spectra corresponding to the estimated haemoglobin and bilirubin distributions at different times after injury. A model is provided that relates haemoglobin and bilirubin content with time after injury, and is used to estimate the haemoglobin and bilirubin distributions as a function of depth, for different times after injury. elastin, melanin, waterĪ method of estimating the age of a haematoma involves measuring skin reflectance of both normal and bruised skin. A61B5/443- Evaluating skin constituents, e.g.Raman spectroscopy, infrared absorption spectroscopy diagnosis by transillumination, diascopy, fluorescence by spectroscopy, i.e. A61B5/0075- Measuring for diagnostic purposes Identification of persons using light, e.g.diagnosis by transillumination, diascopy, fluorescence A61B5/0059- Measuring for diagnostic purposes Identification of persons using light, e.g. ![]() A61B5/445- Evaluating skin irritation or skin trauma, e.g.A61B5/44- Detecting, measuring or recording for evaluating the integumentary system, e.g.A61B5/00- Measuring for diagnostic purposes Identification of persons.A61B- DIAGNOSIS SURGERY IDENTIFICATION.A61- MEDICAL OR VETERINARY SCIENCE HYGIENE.Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.) Filing date Publication date Application filed by Ntnu Technology Transfer As, Jackson, Robert filed Critical Ntnu Technology Transfer As Publication of WO2006117526A2 publication Critical patent/WO2006117526A2/en Publication of WO2006117526A3 publication Critical patent/WO2006117526A3/en Links HAUGEN Original Assignee Ntnu Technology Transfer As Jackson, Robert Priority date (The priority date is an assumption and is not a legal conclusion. ( en Inventor Lise Lyngsnes Randeberg Lars Othar Svaasand Olav A. Google Patents WO2006117526A2 - Determining the age of skin bruises WO2006117526A2 - Determining the age of skin bruises ![]()
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