Abstract
Diffusion theory and similarity relations were used to calculate the optical diffuse reflectance of an infinitely narrow laser beam incident upon a semi-infinite turbid medium. The results were analyzed by comparison with the accurate results from Monte Carlo simulations. Because a large number of photon packets were traced, the variance of the results from Monte Carlo simulations was small enough to reveal the detailed defects of the diffusion theory and the similarity relations, which are broadly used in photomedicine. We demonstrated that both diffusion theory and similarity relations provide very accurate results when the photon sources are isotropic and buried more deeply than one transport mean free path in turbid media. We found that the key factor affecting the accuracy of the diffusion theory application was the conversion from the infinitely narrow laser beam to an isotropic point source in turbid media. Copyright (C) 2000 Elsevier Science Ireland Ltd.
Original language | English (US) |
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Pages (from-to) | 163-170 |
Number of pages | 8 |
Journal | Computer Methods and Programs in Biomedicine |
Volume | 61 |
Issue number | 3 |
DOIs | |
State | Published - Mar 2000 |
Externally published | Yes |
Keywords
- Diffuse reflectance
- Diffusion theory
- Monte Carlo
- Similarity relations
- Turbid media
ASJC Scopus subject areas
- Software
- Computer Science Applications
- Health Informatics