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

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

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Kurzfassung

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.

Dokumentart:Zeitschriftenbeitrag
Titel:Organ shielding and doses in Low-Earth orbit calculated for spherical and anthropomorphic phantoms
Autoren:
AutorenInstitution oder E-Mail-Adresse der Autoren
Matthiä, DanielGerman Aerospace Center, Institute of Aerospace Medicine, Linder Höhe, 51147 Cologne, Germany
Berger, ThomasGerman Aerospace Center, Institute of Aerospace Medicine, Linder Höhe, 51147 Cologne, Germany
Reitz, GüntherGerman Aerospace Center, Institute of Aerospace Medicine, Linder Höhe, 51147 Cologne, Germany
Datum:2013
Erschienen in:Advances in Space Research
Referierte Publikation:Ja
In SCOPUS:Ja
In ISI Web of Science:Ja
Band:52
DOI :10.1016/j.asr.2013.03.025
Seitenbereich:Seiten 528-535
Verlag:Elsevier
ISSN:0273-1177
Status:veröffentlicht
Stichwörter:Shielding, Anthropomorphic phantom, Dosimetry, Radiation exposure, Organ dose, Galactic cosmic rays
HGF - Forschungsbereich:Luftfahrt, Raumfahrt und Verkehr
HGF - Programm:Raumfahrt
HGF - Programmthema:Forschung unter Weltraumbedingungen
DLR - Schwerpunkt:Raumfahrt
DLR - Forschungsgebiet:R FR - Forschung unter Weltraumbedingungen
DLR - Teilgebiet (Projekt, Vorhaben):R - Vorhaben Strahlenbiologie
Standort: Köln-Porz
Institute & Einrichtungen:Institut für Luft- und Raumfahrtmedizin > Strahlenbiologie
Hinterlegt von: Kerstin Kopp
Hinterlegt am:26 Aug 2013 12:00
Letzte Änderung:21 Okt 2015 12:21

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