Respiratory Tract Dosimetry
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Respiratory Tract Dosimetry
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Author : R. A. Guilmette
language : en
Publisher:
Release Date : 1991
Respiratory Tract Dosimetry written by R. A. Guilmette and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1991 with Radiation categories.
Comparison Of Old And New Icrp Models For Respiratory Tract Dosimetry
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Author :
language : en
Publisher:
Release Date : 1993
Comparison Of Old And New Icrp Models For Respiratory Tract Dosimetry written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1993 with categories.
This paper examines the historical development and application of respiratory tract dosimetry models by the International Commission for Radiological Protection, ICRP, for health protection from inhaled radioactive aerosols. Three different models are discussed, those that were included in ICRP recommendations published in 1960 and 1979, and the new ICRP Publication 66. Basic features of these models are compared and contrasted. These features include model structure, sites and frequencies of particle deposition, processes and rates of clearance of the deposited material from the respiratory tract, and consideration of the parameters involved in these processes and how various factors can influence these parameters. All three models lead to the calculation of absorbed radiation doses with differing degrees of regional and local specificity. These calculations are achieved using different tools ranging from quick hand calculations to sophisticated computerized modeling approaches. A side-by-side review of these models indicates several important trends in respiratory tract dosimetry models, the most obvious of which is the increased complexity of each new model over the past 30+ years. These increases reflect both the increasing size of the knowledge base derived from studies in laboratory animals and in human subjects and the need for models more broadly applicable for both occupational and environmental exposures. It is likely that future research will be directed to those key aspects of the new model having the largest uncertainties. The detailed design of the new model and its associated software provide excellent means of identifying useful research areas and using the resulting new information in organized and productive ways.
An Implementation Of The Icrp66 Respiratory Tract Model In Internal Dosimetry
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Author : Robert Allan Corns
language : en
Publisher:
Release Date : 1996
An Implementation Of The Icrp66 Respiratory Tract Model In Internal Dosimetry written by Robert Allan Corns and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1996 with categories.
"This treatise examines the ICRP's new respiratory tract model and its implementation into G scENMOD, a program that facilitates internal dosimetric calculation for the body. The inclusion of the ICRP66 model into G scENMOD improves the radiation dose estimates to the respiratory tract. The accuracy of this implementation was confirmed by validating G scENMOD's output against results published in ICRP66." --
Respiratory Tract Clearance Model For Dosimetry And Bioassay Of Inhaled Radionuclides
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Author :
language : en
Publisher:
Release Date : 1990
Respiratory Tract Clearance Model For Dosimetry And Bioassay Of Inhaled Radionuclides written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1990 with categories.
The ICRP Task Group on Respiratory Tract Models is developing a model to describe the retention and clearance of deposited radionuclides for dose-intake calculations and interpretation of bioassay data. Clearance from each region is treated as competition between mechanical transport, which moves particles to the gastro-intestinal tract and lymph nodes, and the translocation of material to blood. It is assumed that mechanical transport rates are the same for all materials, and that rates of translocation to blood are the same in all regions. Time-dependent clearance is represented by combinations of compartments. Representative values of parameters to describe mechanical transport from the human respiratory tract have been estimated, and guidance is given on the determination of translocation rates. It is emphasized that the current version of the model described here is still provisional. 30 refs.
Probabilistic Respiratory Tract Dosimetry Model With Application To Beta Particle And Photon Emitters
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Author : Eduardo Farfan
language : en
Publisher:
Release Date : 2002
Probabilistic Respiratory Tract Dosimetry Model With Application To Beta Particle And Photon Emitters written by Eduardo Farfan and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2002 with Nuclear medicine categories.
Respiratory Tract Dosimetry
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Author :
language : en
Publisher:
Release Date : 1991
Respiratory Tract Dosimetry written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1991 with Radiation categories.
Lower Respiratory Tract Structure Of Laboratory Animals And Humans
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Author : F. J. Miller
language : en
Publisher:
Release Date : 1993
Lower Respiratory Tract Structure Of Laboratory Animals And Humans written by F. J. Miller and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1993 with Respiratory infections categories.
Extrapolation Of Dosimetric Relationships For Inhaled Particles And Gases
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Author : James D. Crapo
language : en
Publisher:
Release Date : 1989
Extrapolation Of Dosimetric Relationships For Inhaled Particles And Gases written by James D. Crapo and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1989 with Medical categories.
Extrapolation Modeling, Advancements and Research Issues in Lung Dosimetry; Lung Structure, Function Relationships; Species Differences in Airway Cell Distribution and Morphology; Alternative Methods to Evaluate Species Differences in Upper Airway Structure, Function; Preparation of Rat Nasal Airway Casts and Their Application to Studies of Nasal Airflow; Age Related Morphometric Analysis of Human Lung Casts; Anatomical Modeling of Microdosimetry of Inhaled Particles and Gases in the Lung; Experimental Dosimetry; Particle Deposition at the Alveolar Duct Bifurcations; Effects of Airway Branch Angle, Branch Point Number, and Gravity on Particle Deposition and Retention; Regional Deposition of Inhaled Particulates in Conducting Airways and Lung Segments; The Physical Properties of Mainstream Cigarette Smoke and Their Relationship to Deposition in the Respiratory Tract; Localization of 14C Dotriacontane Labeled Cigarette Smoke Particulate in the Dog Lung; Human Lung Clearance Following Bolus Inhalation of Radioaerosols; Effects of Ventilatory Patterns and Pre-existing Disease on Deposition of Inhaled Particles in Animals; Nasopharyngeal Uptake of Ozone in Humans and Animals; New Methods; Regional Dosimetry of Inhaled Particles Using SPECT; Dual Laser Doppler System for Real Time, Simultaneous Characterization of Aerosols by Size and Concentration; Dosimetry of Inhaled Particles by Means of Light Scattering; Modeling Approaches; Issues That Must Be Addressed When Constructing Anatomical Models of the Developing Lung; Significances of the Variability of Tracheobronchial Airway Paths and Their Air Flow Rates to Dosimetry Model Predictions of the Absorption of Gases; Predicting Respiratory Tract Clearance in Man; The Role of Particle Hygroscopicity in Aerosol Therapy and Inhalation Toxicology; Age-Dependent Lung Dosimetry of Radon Progeny; Deposition and Retention Modeling of Inhaled Cadmium in Rat and Human Lung, An Example for Extrapolation of Effects and Risk Estimation.
Radiation Dosimetry For The Respiratory Tract Of Uranium Miners
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Author : Dan Foy Holleman
language : en
Publisher:
Release Date : 1968
Radiation Dosimetry For The Respiratory Tract Of Uranium Miners written by Dan Foy Holleman and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1968 with Radiation categories.
Exercise And Regional Dosimetry
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Author : FJ. Miller
language : en
Publisher:
Release Date : 1989
Exercise And Regional Dosimetry written by FJ. Miller and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1989 with Air categories.
Regional respiratory tract dosimetry is an important consideration when examining susceptibility to inhaled gases and particles. In this overview, an orientation is provided on the major anatomical ventilatory and physiologic factors that affect regional respiratory tract dosimetry. The influence of these factors and the physical laws governing deposition exhibit complex relationships for the extrathoracic, tracheobronchial, and pulmonary regions of the respiratory tract. Specific examples of regional dosimetry of insoluble and hygroscopic particles and an oxidant gas are presented to help identify critical issues and research areas related to susceptibility to inhaled pollutants.