Laser Doppler Flowmetry

Over the last 30 years, the department of Biomedical Engineering at Linköping university has been known for its research in Laser Doppler Flowmetry (LDF). LDF is a non invasive method to measure the microcirculatory blood flow in for example the skin, based on the fact that light impinging any moving scattering object undergoes a very small frequency shift, known as the Doppler effect. If you are interested in the theory behind LDF, please consult the article Laser Doppler Flowmetry - a Theoretical Framework availeble as html and pdf.

Current research within LDF at the department involves methodological improvements towards a velocity resolved LDF, measured in absolute units ml blood / 100g tissue x mm / s and with a known sampling volume. This project, called Advanced Algorithms in Laser Doppler Flowmetry, is a part of the new centre of excellence for Biomedical Data Processing (CBDP, formerly known as NIMED), funded by LiU and the SME Perimed AB. The group members are professor Tomas Strömberg, PhD Marcus Larsson and PhD student Ingemar Fredriksson.

LDF is also used in research on optical guidance during stereotactic functional neurosurgery in the project Neuro-engineering for navigation, intervention and implementation in neurosurgery. The group members working with LDF are professor Karin Wårdell, PhD Ola Eriksson and PhD student Johannes Johansson.