elib
DLR-Header
DLR-Logo -> http://www.dlr.de
DLR Portal Home | Imprint | Contact | Deutsch
Fontsize: [-] Text [+]

Organ shielding and doses in Low-Earth orbit calculated for spherical and anthropomorphic phantoms

Matthia, Daniel and Berger, Thomas and Reitz, Günther (2013) Organ shielding and doses in Low-Earth orbit calculated for spherical and anthropomorphic phantoms. Advances in Space Research, 52 (3), pp. 528-535. Elsevier. DOI: 10.1016/j.asr.2013.03.025. ISSN 0273-1177.

Full text not available from this repository.

Abstract

Humans in space are exposed to elevated levels of radiation compared to ground. Different sources contribute to the total exposure with galactic cosmic rays being the most important component. The application of numerical and anthropomorphic phantoms in simulations allows the estimation of dose rates from galactic cosmic rays in individual organs and whole body quantities such as the effective dose. The male and female reference phantoms defined by the International Commission on Radiological Protection and the hermaphrodite numerical RANDO phantom are voxel implementations of anthropomorphic phantoms and contain all organs relevant for radiation risk assessment. These anthropomorphic phantoms together with a spherical water phantom were used in this work to translate the mean shielding of organs in the different anthropomorphic voxel phantoms into positions in the spherical phantom. This relation allows using a water sphere as surrogate for the anthropomorphic phantoms in both simulations and measurements. Moreover, using spherical phantoms in the calculation of radiation exposure offers great advantages over anthropomorphic phantoms in terms of computational time. In this work, the mean shielding of organs in the different voxel phantoms exposed to isotropic irradiation is presented as well as the corresponding depth in a water sphere. Dose rates for Low-Earth orbit from galactic cosmic rays during solar minimum conditions were calculated using the different phantoms and are compared to the results for a spherical water phantom in combination with the mean organ shielding. For the spherical water phantom the impact of different aluminium shielding between 1 g/cm² and 100 g/cm² was calculated. The dose equivalent rates were used to estimate the effective dose rate.

Document Type:Article
Title:Organ shielding and doses in Low-Earth orbit calculated for spherical and anthropomorphic phantoms
Authors:
AuthorsInstitution or Email of Authors
Matthia, Daniel German Aerospace Center, Institute of Aerospace Medicine, Linder Höhe, 51147 Cologne, Germany
Berger, Thomas German Aerospace Center, Institute of Aerospace Medicine, Linder Höhe, 51147 Cologne, Germany
Reitz, Günther German Aerospace Center, Institute of Aerospace Medicine, Linder Höhe, 51147 Cologne, Germany
Date:2013
Journal or Publication Title:Advances in Space Research
Refereed publication:Yes
In SCOPUS:Yes
In ISI Web of Science:Yes
Volume:52
DOI:10.1016/j.asr.2013.03.025
Page Range:pp. 528-535
Publisher:Elsevier
ISSN:0273-1177
Status:Published
Keywords:Shielding, Anthropomorphic phantom, Dosimetry, Radiation exposure, Organ dose, Galactic cosmic rays
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Research under Space Conditions
DLR - Research area:Raumfahrt
DLR - Program:R FR - Forschung unter Weltraumbedingungen
DLR - Research theme (Project):R - Vorhaben Strahlenbiologie
Location: Köln-Porz
Institutes and Institutions:Institute of Aerospace Medicine > Radiation Biology
Deposited By: Kerstin Kopp
Deposited On:26 Aug 2013 12:00
Last Modified:26 Aug 2013 12:00

Repository Staff Only: item control page

Browse
Search
Help & Contact
Informationen
electronic library is running on EPrints 3.3.12
Copyright © 2008-2012 German Aerospace Center (DLR). All rights reserved.