Absorbed fraction of alpha-particles emitted in bifurcation regions of the human tracheo-bronchial tree

Radiation and Environmental Biophysics
D Nikezic, K N Yu

Abstract

A model for bifurcation regions of the human tracheo-bronchial tree was developed. Equations for the surfaces are given to enable calculations of doses from alpha-particles emitted in these regions. It has been found that a bifurcation region is well approximated by a quasi-ellipsoid. The absorbed fractions of alpha-particles emitted in bifurcation regions were calculated by the Monte Carlo method. The average absorbed fraction under the bifurcation geometry is close to that found under the cylindrical geometry in the bronchial region. In the bronchiolar region, the absorbed fractions under the bifurcation geometry are up to 20% larger than those under the cylindrical geometry.

Citations

May 9, 2006·Journal of Environmental Radioactivity·D NikezicK N Yu
Jun 2, 2018·Journal of Radiological Protection : Official Journal of the Society for Radiological Protection·Hongyu ZhuHui Zhang
Apr 26, 2020·International Journal of Environmental Research and Public Health·W S KwanK N Yu
Dec 22, 2019·Radiation and Environmental Biophysics·Werner HofmannImre Balásházy
Jan 11, 2007·Radiation Protection Dosimetry·B M F LauK N Yu

Related Concepts

Air Pollutants, Radioactive
Alpha Radiation
Lobar Bronchus Structure
Lung
Theoretical Study
Monte Carlo Method
Muscularis Mucosae
Nuclear Track Detection
Actinon
Trachea

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