### Abstract

The spatial distribution of radiation during medical laser application is determined by the characteristics of the beam (power, time, beam geometry) and the optical properties of the tissue. The irradiance E (in W/m^{2}) describes the primary laser beam. Scattered radiation, in turn, is taken into account by the fluence rate φ (also in W/m^{2}). The basic parameters of tissue optics are the absorption coefficient μ_{a}, the scattering coefficient μ_{s} and the anisotropy factor g. In addition, derived parameters are also used, i. e., total attenuation coefficient μ_{t}, reduced scattering coefficient μ_{s}′, effective attenuation coefficient μ_{eff}, mean free path of a photon d and penetration depth δ. Further tissue properties are the diffuse reflectance R_{d} and the back-scattering factor k. In an one-dimensional model the fluence rate φ in tissue is a nearly exponential function characterized by the penetration depth δ. At the tissue surface, the relationship exists φ=kE. This model is compared with the results of a computer program based on the finite element method.

Original language | German |
---|---|

Pages (from-to) | 195-200 |

Number of pages | 6 |

Journal | Zeitschrift fur Medizinische Physik |

Volume | 11 |

Issue number | 3 |

Publication status | Published - 2001 Oct 16 |

Externally published | Yes |

### Fingerprint

### Keywords

- Laser medicine
- Optical dosimetry
- Optics
- Tissue

### ASJC Scopus subject areas

- Biophysics

### Cite this

*Zeitschrift fur Medizinische Physik*,

*11*(3), 195-200.

**Einführung in die gewebeoptik und optische dosimetrie.** / Eichler, J.; Kim, Beop-Min.

Research output: Contribution to journal › Article

*Zeitschrift fur Medizinische Physik*, vol. 11, no. 3, pp. 195-200.

}

TY - JOUR

T1 - Einführung in die gewebeoptik und optische dosimetrie

AU - Eichler, J.

AU - Kim, Beop-Min

PY - 2001/10/16

Y1 - 2001/10/16

N2 - The spatial distribution of radiation during medical laser application is determined by the characteristics of the beam (power, time, beam geometry) and the optical properties of the tissue. The irradiance E (in W/m2) describes the primary laser beam. Scattered radiation, in turn, is taken into account by the fluence rate φ (also in W/m2). The basic parameters of tissue optics are the absorption coefficient μa, the scattering coefficient μs and the anisotropy factor g. In addition, derived parameters are also used, i. e., total attenuation coefficient μt, reduced scattering coefficient μs′, effective attenuation coefficient μeff, mean free path of a photon d and penetration depth δ. Further tissue properties are the diffuse reflectance Rd and the back-scattering factor k. In an one-dimensional model the fluence rate φ in tissue is a nearly exponential function characterized by the penetration depth δ. At the tissue surface, the relationship exists φ=kE. This model is compared with the results of a computer program based on the finite element method.

AB - The spatial distribution of radiation during medical laser application is determined by the characteristics of the beam (power, time, beam geometry) and the optical properties of the tissue. The irradiance E (in W/m2) describes the primary laser beam. Scattered radiation, in turn, is taken into account by the fluence rate φ (also in W/m2). The basic parameters of tissue optics are the absorption coefficient μa, the scattering coefficient μs and the anisotropy factor g. In addition, derived parameters are also used, i. e., total attenuation coefficient μt, reduced scattering coefficient μs′, effective attenuation coefficient μeff, mean free path of a photon d and penetration depth δ. Further tissue properties are the diffuse reflectance Rd and the back-scattering factor k. In an one-dimensional model the fluence rate φ in tissue is a nearly exponential function characterized by the penetration depth δ. At the tissue surface, the relationship exists φ=kE. This model is compared with the results of a computer program based on the finite element method.

KW - Laser medicine

KW - Optical dosimetry

KW - Optics

KW - Tissue

UR - http://www.scopus.com/inward/record.url?scp=0034804587&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0034804587&partnerID=8YFLogxK

M3 - Article

C2 - 11668817

AN - SCOPUS:0034804587

VL - 11

SP - 195

EP - 200

JO - Zeitschrift fur Medizinische Physik

JF - Zeitschrift fur Medizinische Physik

SN - 0939-3889

IS - 3

ER -