Portal de Periódicos da CAPES

Optical non-invasive technique for vessel imaging: II. A simplified photon diffusion analysis

2000; IOP Publishing; Volume: 45; Issue: 12 Linguagem: Inglês

10.1088/0031-9155/45/12/319

1361-6560

Ivo Fridolin, K Hansson, L-G Lindberg,

Infrared Thermography in Medicine

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.