### Abstract

Light pulses have found increasing use in medicine and biology. Biological tissues, however, scatter light very strongly, and the modeling of light pulse propagation in biological tissues has not been established because of scattering. We compare the results of three modeling methods, the photon diffusion approximation, the diffusive wave approximation, and the two-flux method with those of the discrete ordinate method which provides the exact solution of the transient equation of radiative transfer for the case of 1 picosecond pulse incidence on scattering and absorbing slab or semi-infinite media simulating biological tissues. The early behavior of the light pulses predicted by the photon diffusion approximation is quite different from that by the diffusive wave approximation. In the later period both the photon diffusion and diffusive wave approximations are able to give reasonable results, but the two-flux method is not. Because of much shorter computation time, the diffusive wave approximation is advantageous to the photon diffusion approximation.

Original language | English (US) |
---|---|

Pages (from-to) | 895-900 |

Number of pages | 6 |

Journal | Nippon Kikai Gakkai Ronbunshu, C Hen/Transactions of the Japan Society of Mechanical Engineers, Part C |

Volume | 63 |

Issue number | 607 |

State | Published - Mar 1997 |

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### ASJC Scopus subject areas

- Mechanical Engineering

### Cite this

*Nippon Kikai Gakkai Ronbunshu, C Hen/Transactions of the Japan Society of Mechanical Engineers, Part C*,

*63*(607), 895-900.

**Modeling of ultrashort light pulse propagation in light scattering media.** / Kumar, Sunil; Mitra, Kunal; Vedavarz, Ali; Yamada, Yukio.

Research output: Contribution to journal › Article

*Nippon Kikai Gakkai Ronbunshu, C Hen/Transactions of the Japan Society of Mechanical Engineers, Part C*, vol. 63, no. 607, pp. 895-900.

}

TY - JOUR

T1 - Modeling of ultrashort light pulse propagation in light scattering media

AU - Kumar, Sunil

AU - Mitra, Kunal

AU - Vedavarz, Ali

AU - Yamada, Yukio

PY - 1997/3

Y1 - 1997/3

N2 - Light pulses have found increasing use in medicine and biology. Biological tissues, however, scatter light very strongly, and the modeling of light pulse propagation in biological tissues has not been established because of scattering. We compare the results of three modeling methods, the photon diffusion approximation, the diffusive wave approximation, and the two-flux method with those of the discrete ordinate method which provides the exact solution of the transient equation of radiative transfer for the case of 1 picosecond pulse incidence on scattering and absorbing slab or semi-infinite media simulating biological tissues. The early behavior of the light pulses predicted by the photon diffusion approximation is quite different from that by the diffusive wave approximation. In the later period both the photon diffusion and diffusive wave approximations are able to give reasonable results, but the two-flux method is not. Because of much shorter computation time, the diffusive wave approximation is advantageous to the photon diffusion approximation.

AB - Light pulses have found increasing use in medicine and biology. Biological tissues, however, scatter light very strongly, and the modeling of light pulse propagation in biological tissues has not been established because of scattering. We compare the results of three modeling methods, the photon diffusion approximation, the diffusive wave approximation, and the two-flux method with those of the discrete ordinate method which provides the exact solution of the transient equation of radiative transfer for the case of 1 picosecond pulse incidence on scattering and absorbing slab or semi-infinite media simulating biological tissues. The early behavior of the light pulses predicted by the photon diffusion approximation is quite different from that by the diffusive wave approximation. In the later period both the photon diffusion and diffusive wave approximations are able to give reasonable results, but the two-flux method is not. Because of much shorter computation time, the diffusive wave approximation is advantageous to the photon diffusion approximation.

UR - http://www.scopus.com/inward/record.url?scp=0031100063&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0031100063&partnerID=8YFLogxK

M3 - Article

AN - SCOPUS:0031100063

VL - 63

SP - 895

EP - 900

JO - Nippon Kikai Gakkai Ronbunshu, C Hen/Transactions of the Japan Society of Mechanical Engineers, Part C

JF - Nippon Kikai Gakkai Ronbunshu, C Hen/Transactions of the Japan Society of Mechanical Engineers, Part C

SN - 0387-5024

IS - 607

ER -