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RECORD NUMBER: 45 OF 47

OLS Field Name OLS Field Data
Main Title Structural Differences between Human and Rat Lung: Implications for Monte Carlo Modeling of Aerosol Deposition. Biological Factors in Modeling: Respiratory Tract.
Author Hofmann, W. ; Koblinger, L. ; Martonen, T. B. ;
CORP Author Health Effects Research Lab., Research Triangle Park, NC. ;Kozponti Fizikai Kutato Intezet, Budapest (Hungary). ;Duke Univ. Medical Center, Durham, NC.
Publisher c1989
Year Published 1989
Report Number EPA/600/J-89/367;
Stock Number PB90-215922
Additional Subjects Anatomy ; Lung ; Aerosols ; Rats ; Humans ; Monte Carlo method ; Graphs(Charts) ; Statistical analysis ; Reprints ;
Holdings
Library Call Number Additional Info Location Last
Modified
Checkout
Status
NTIS  PB90-215922 Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy. 08/27/1990
Collation 9p
Abstract
The geometrical structure of the lung is one of the main factors governing inhaled particle deposition; structural differences among different species are, therefore, of great importance for extrapolation modeling. A statistical analysis of morphometric data for the human and rat tracheobronchial tree reveals significant interspecies differences in airway branching patterns: compared to the relative dichotomous and symmetric structure of the human lung, the rat lung displays a more monopodial airway branching pattern. Thus, for the rat lung a given airway is characterized, its size, physiologic function, and distance from the trachea by its diameter and not by a theoretically assigned generation number. A Monte Carlo method is used to construct an airway geometry along each inhaled particle's path by selecting airway parameters randomly from their frequency distributions and the correlations among them. While the airway geometry is selected randomly, particle deposition in individual airways is calculated analytically. (Copyright (c) 1989 Health Physics Society, Pergamon Press plc.)