Featured Research

from universities, journals, and other organizations

Forensics: Lamps and spectrometers used to age bruises precisely

Date:
June 21, 2011
Source:
The Research Council of Norway
Summary:
Forensic scientists have to rely on their own subjective experience when asked to ascertain the age of contusions. Now, however, researchers in Norway have found a far more objective and precise method, using lamps and spectrometers. From the assembled data the researchers created a model for bruise progression over time which enables them to determine the age of the bruises more reliably. Bruises on children develop differently from on adults. Knowledge within this area could be particularly important in cases of suspected child abuse.

Forensic scientists have to rely on their own subjective experience when asked to ascertain the age of contusions. Now, however, researchers in Norway have found a far more objective and precise method.

Related Articles


Scientists knew surprisingly little about how to tell the age of bruises before Lise Lyngsnes Randeberg and her colleagues at the Norwegian University of Science and Technology (NTNU) in Trondheim approached the issue.

Algorithms and light

Previous research has shown that forensic scientists are wrong roughly half the time when attempting to determine the age of bruises based on their visible colours. Such a high margin of error is unacceptable, so Norwegian researchers began searching for more reliable methods for dating bruises.

In a project that receives funding under the Research Council's open competitive arena for independent, researcher-initiated basic research projects, the NTNU researchers first studied various bruises using light, then they formulated algorithms for how a bruise progresses over time. The technology they applied is simple and common: a lamp illuminates the bruise, and a spectrometer measures the reflected light.

Entirely new model developed

The true breakthrough, however, came when the researchers worked out a model that predicts how a bruise will develop over time.

They were able to conduct controlled studies of bruise infliction -- thanks to willing volunteers from among NTNU's martial arts enthusiasts. A study was also carried out on older bypass operation patients taking blood-thinning medication. A third subject group comprised unconscious pigs under general anaesthesia.

"This allowed us to follow the development of a range of different contusions from the moment they were sustained," explains the NTNU associate professor. From these data the researchers created a model for bruise progression over time which enables them to determine the age of the bruises more reliably.

Seeking knowledge about bruising on children

Next, Professor Randeberg will be studying bruising on children, which develops differently from on adults. Knowledge within this area could be particularly important in cases of suspected child abuse.


Story Source:

The above story is based on materials provided by The Research Council of Norway. The original article was written by Synnøve Bolstad/Else Lie. Translation: Darren McKellep/Carol B. Eckmann. Note: Materials may be edited for content and length.


Cite This Page:

The Research Council of Norway. "Forensics: Lamps and spectrometers used to age bruises precisely." ScienceDaily. ScienceDaily, 21 June 2011. <www.sciencedaily.com/releases/2011/06/110614083930.htm>.
The Research Council of Norway. (2011, June 21). Forensics: Lamps and spectrometers used to age bruises precisely. ScienceDaily. Retrieved November 26, 2014 from www.sciencedaily.com/releases/2011/06/110614083930.htm
The Research Council of Norway. "Forensics: Lamps and spectrometers used to age bruises precisely." ScienceDaily. www.sciencedaily.com/releases/2011/06/110614083930.htm (accessed November 26, 2014).

Share This


More From ScienceDaily



More Matter & Energy News

Wednesday, November 26, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

NASA's First 3-D Printer In Space Creates Its First Object

NASA's First 3-D Printer In Space Creates Its First Object

Newsy (Nov. 26, 2014) — The International Space Station is now using a proof-of-concept 3D printer to test additive printing in a weightless, isolated environment. Video provided by Newsy
Powered by NewsLook.com
Bolivian Recycling Initiative Turns Plastic Waste Into School Furniture

Bolivian Recycling Initiative Turns Plastic Waste Into School Furniture

Reuters - Innovations Video Online (Nov. 26, 2014) — Innovative recycling project in La Paz separates city waste and converts plastic garbage into school furniture made from 'plastiwood'. Tara Cleary reports. Video provided by Reuters
Powered by NewsLook.com
Blu-Ray Discs Getting Second Run As Solar Panels

Blu-Ray Discs Getting Second Run As Solar Panels

Newsy (Nov. 26, 2014) — Researchers at Northwestern University are repurposing Blu-ray movies for better solar panel technology thanks to the discs' internal structures. Video provided by Newsy
Powered by NewsLook.com
Today's Prostheses Are More Capable Than Ever

Today's Prostheses Are More Capable Than Ever

Newsy (Nov. 26, 2014) — Advances in prosthetics are making replacement body parts stronger and more lifelike than they’ve ever been. Video provided by Newsy
Powered by NewsLook.com

Search ScienceDaily

Number of stories in archives: 140,361

Find with keyword(s):
 
Enter a keyword or phrase to search ScienceDaily for related topics and research stories.

Save/Print:
Share:  

Breaking News:

Strange & Offbeat Stories

 

Space & Time

Matter & Energy

Computers & Math

In Other News

... from NewsDaily.com

Science News

Health News

Environment News

Technology News



Save/Print:
Share:  

Free Subscriptions


Get the latest science news with ScienceDaily's free email newsletters, updated daily and weekly. Or view hourly updated newsfeeds in your RSS reader:

Get Social & Mobile


Keep up to date with the latest news from ScienceDaily via social networks and mobile apps:

Have Feedback?


Tell us what you think of ScienceDaily -- we welcome both positive and negative comments. Have any problems using the site? Questions?
Mobile iPhone Android Web
Follow Facebook Twitter Google+
Subscribe RSS Feeds Email Newsletters
Latest Headlines Health & Medicine Mind & Brain Space & Time Matter & Energy Computers & Math Plants & Animals Earth & Climate Fossils & Ruins