PMID: 14689994Dec 24, 2003

Effects of different deposition models on the calculated dose conversion factors from 222Rn progeny

Journal of Environmental Radioactivity
D NikezicK N Yu


Regional lung deposition for radon progeny (size range, 1 nm to 1000 nm, monodispersed) has been determined employing Gormley-Kennedy, Ingham, Cohen-Asgharian and Yu-Cohen expressions (which describe diffusion deposition), together with Gurman and Cheng formulae for impaction and sedimentation, respectively. The deposition values have been compared with those obtained by using the algebraic expressions recommended by ICRP66. The behavior of the deposition curves for breathing rates of 0.45, 0.78 and 1.2 m3 h(-1) are similar, with a broad maximum in the range (1-100) nm. In the particle size range (1-100) nm, where the thermodynamic efficiency predominates, there are large differences among the five approaches, with ICRP values lying somewhat in the middle. Dose Conversion Factors nearly follow the regional deposition trends, Cohen-Asgharian and Ingham, close to the highest values, Yu-Cohen the lowest and ICRP, again, somewhat in the middle.


Jan 1, 1988·European Journal of Nuclear Medicine·J A CampsE K Pauwels
Jul 1, 1987·Fundamental and Applied Toxicology : Official Journal of the Society of Toxicology·J B Morris, D G Cavanagh
Dec 1, 1972·Health Physics·N H Harley, B S Pasternack
Jul 1, 1972·Health Physics·D Martin, W Jacobi
Jun 1, 1969·The British Journal of Radiology·D V BookerA N Stott
May 1, 1967·Health Physics·A K Haque, A J Collinson
Jun 1, 1982·Physics in Medicine and Biology·J R GreenhalghA Hodgson
Jan 1, 1980·Bulletin of Mathematical Biology·H C Yeh, G M Schum
Jun 1, 1956·The British Journal of Radiology·A C CHAMBERLAIN, E D DYSON
Jul 1, 1963·The American Journal of Medicine·A I SUTNICK, L A SOLOFF
Dec 1, 1964·Health Physics·B ALTSHULERM KUSCHNER


Oct 15, 2003·Journal of Environmental Radioactivity·Frédéric PerrierJean Louis Le Mouël
Nov 14, 2003·Journal of Environmental Radioactivity·T T Cheung, K N Yu
Oct 16, 2009·The Science of the Total Environment·Mari PietikäinenRiitta L Keiski
Dec 18, 2004·Journal of Environmental Radioactivity·Tünde KatonaJ Somlai
Oct 30, 2004·Journal of Environmental Radioactivity·Patrick RichonEric Pili
Apr 26, 2020·International Journal of Environmental Research and Public Health·W S KwanK N Yu
Jan 11, 2007·Radiation Protection Dosimetry·B M LauK N Yu

Related Concepts

Monte Carlo Method
Thoron Daughters
Inhalation Exposure

Trending Feeds


Coronaviruses encompass a large family of viruses that cause the common cold as well as more serious diseases, such as the ongoing outbreak of coronavirus disease 2019 (COVID-19; formally known as 2019-nCoV). Coronaviruses can spread from animals to humans; symptoms include fever, cough, shortness of breath, and breathing difficulties; in more severe cases, infection can lead to death. This feed covers recent research on COVID-19.

Neural Activity: Imaging

Imaging of neural activity in vivo has developed rapidly recently with the advancement of fluorescence microscopy, including new applications using miniaturized microscopes (miniscopes). This feed follows the progress in this growing field.

The Tendon Seed Network

Tendons are rich in the extracellular matrix and are abundant throughout the body providing essential roles including structure and mobility. The transcriptome of tendons is being compiled to understand the micro-anatomical functioning of tendons. Discover the latest research pertaining to the Tendon Seed Network here.

Myocardial Stunning

Myocardial stunning is a mechanical dysfunction that persists after reperfusion of previously ischemic tissue in the absence of irreversible damage including myocardial necrosis. Here is the latest research.

Chronic Fatigue Syndrome

Chronic fatigue syndrome is a disease characterized by unexplained disabling fatigue; the pathology of which is incompletely understood. Discover the latest research on chronic fatigue syndrome here.


Incretins are metabolic hormones that stimulate a decrease in glucose levels in the blood and they have been implicated in glycemic regulation in the remission phase of type 1 diabetes. Here is the latest research.

Chromatin Regulation and Circadian Clocks

The circadian clock plays an important role in regulating transcriptional dynamics through changes in chromatin folding and remodelling. Discover the latest research on Chromatin Regulation and Circadian Clocks here.

Long COVID-19

“Long Covid-19” describes illness in patients who are reporting long-lasting effects of the SARS-CoV-19 infection, often long after they have recovered from acute Covid-19. Ongoing health issues often reported include low exercise tolerance and breathing difficulties, chronic tiredness, and mental health problems such as post-traumatic stress disorder and depression. This feed follows the latest research into Long Covid.

Spatio-Temporal Regulation of DNA Repair

DNA repair is a complex process regulated by several different classes of enzymes, including ligases, endonucleases, and polymerases. This feed focuses on the spatial and temporal regulation that accompanies DNA damage signaling and repair enzymes and processes.

Related Papers

Applied Radiation and Isotopes : Including Data, Instrumentation and Methods for Use in Agriculture, Industry and Medicine
T T CheungD Nikezic
© 2021 Meta ULC. All rights reserved