International Journal of Radiation Research
نشریه پرتو پژوه
Int J Radiat Res
Basic Sciences
http://ijrr.com
79
journal79
2322-3243
2345-4229
10.61186/ijrr
en
jalali
1398
7
1
gregorian
2019
10
1
17
4
online
1
fulltext
en
Estimation of absorbed fraction and specific energy of radon progeny for a Syrian adult tracheobronchial tree
Radiation Biology
Radiation Biology
تحقيق بديع
Original Research
<div style="text-align: justify;">Background: Ondo Estimating the health effect of 222Rn progeny deposited on inner surfaces of airways regions is of great interest because 222Rn progeny are considered the major contributors in imparted energy to lung structures. Materials and Methods: In this study, (CT) scan of a healthy, non-smoking Syrian volunteer male, 3D-Slicer 4.7.0 medical image processing software, Solidworks mechanical design software and MCNPX 2.5.B code were used to create the geometry and to evaluate the absorbed fraction and specific energy due to alpha particles emitted by inhaled radon progeny in nuclei and layers of sensitive cells in the epithelium of human trachea-bronchial tree. Absorbed fraction (AF) and specific energy were determined using Micro-dosimetry approach and airway tube wall as proposed by ICRP (1994), and NRC (1991). Results: Absorbed fractions (AFs) and specific energy of alpha particles were calculated for each generation from 1st to 15th. Comparison of average AFs values in sensitive layers was carried out with ICRP66 airway model where some significant differences were found due to dimensions differences between both models. Furthermore, AFs of cell nuclei had the same trend of those for layers, where the highest values were for 7.69 MeV alpha particles in BB region and the opposite in bb region. Conclusion: Interactions of alpha particles with secretory and basal cells show significant differences which can influence dose weightings. Comparisons with ICRP66 data reveal the influence of geometry and target cells distribution on absorbed fraction and specific energy values.</div>
Absorbed fraction, specific energy, Radon progeny, micro-dosimetry, Monte Carlo method.
605
615
http://ijrr.com/browse.php?a_code=A-10-1-823&slc_lang=en&sid=1
B.
Rawaa
bardan.raw@gmail.com
7900319475328460013967
7900319475328460013967
No
Physics Department, Faculty of Science, Damascus University, Syria
S.
Al Tarabichi
7900319475328460013968
7900319475328460013968
No
Physics Department, Faculty of Science, Damascus University, Syria