Optical non-invasive technique for vessel imaging: II. A simplified photon diffusion analysis.
The purpose of this paper is to explain theoretically the origin of previously presented experimental results by an optical non-invasive method using NIR for imaging blood vessels based on a specific combination of several physical parameters. The theoretical model is based on the diffusion approximation derived from the transport theory deep in a bulk tissue. An analytical solution was obtained describing photon behaviour under certain conditions during vessel identification. The modelled results indicate that the vessel identification facility depends upon source-detector separation and vessel depth, and does not depend essentially on the radiant power from the light source. The solution offers a relatively simple theoretical explanation of the experimental results and can be applied to several other clinical applications using similar technical solutions.
Fridolin
I
I
Department of Biomedical Engineering, Linköping University, University Hospital, Sweden. ivofr@imt.liu.se
Hansson
K
K
Lindberg
L G
LG
D000465:Algorithms; D001158:Arteries / Q000502:physiology; D001808:Blood Vessels / Q000378:metabolism* / Q000502:physiology*; D003952:Diagnostic Imaging / Q000295:instrumentation* / Q000379:methods*; D006801:Humans; D007259:Infrared Rays; D008027:Light; D015233:Models, Statistical; D009010:Monte Carlo Method; D012542:Scattering, Radiation; D014680:Veins / Q000502:physiology