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

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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 quasiellipsoid. 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.

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Authors and Affiliations

  1. Department of Physics and Materials Science, City University of Hong Kong, Tat Chee Avenue, Kowloon Tong, Kowloon, Hong Kong

    K. N. Yu

  2. Faculty of Science, University of Kragujevac, 34000, Kragujevac, Yugoslavia

    D. Nikezic

Authors
  1. D. Nikezic
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  2. K. N. Yu
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Correspondence to K. N. Yu.

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Published online: 8 April 2003

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Nikezic, D., Yu, K.N. Absorbed fraction of alpha-particles emitted in bifurcation regions of the human tracheo-bronchial tree. Radiat Environ Biophys 42, 49–53 (2003). https://doi.org/10.1007/s00411-003-0185-8

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  • DOI: https://doi.org/10.1007/s00411-003-0185-8

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