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Comparison of Organ Dose and Dose Equivalent Using Ray Tracing of Male and Female Voxel Phantoms to Space Flight Phantom Torso DataPhantom torso experiments have been flown on the space shuttle and International Space Station (ISS) providing validation data for radiation transport models of organ dose and dose equivalents. We describe results for space radiation organ doses using a new human geometry model based on detailed Voxel phantoms models denoted for males and females as MAX (Male Adult voXel) and Fax (Female Adult voXel), respectively. These models represent the human body with much higher fidelity than the CAMERA model currently used at NASA. The MAX and FAX models were implemented for the evaluation of directional body shielding mass for over 1500 target points of major organs. Radiation exposure to solar particle events (SPE), trapped protons, and galactic cosmic rays (GCR) were assessed at each specific site in the human body by coupling space radiation transport models with the detailed body shielding mass of MAX/FAX phantom. The development of multiple-point body-shielding distributions at each organ site made it possible to estimate the mean and variance of space dose equivalents at the specific organ. For the estimate of doses to the blood forming organs (BFOs), active marrow distributions in adult were accounted at bone marrow sites over the human body. We compared the current model results to space shuttle and ISS phantom torso experiments and to calculations using the CAMERA model.
Document ID
20080012528
Acquisition Source
Johnson Space Center
Document Type
Conference Paper
Authors
Kim, Myung-Hee Y.
(Universities Space Research Association Houston, TX, United States)
Qualls, Garry D.
(NASA Langley Research Center Hampton, VA, United States)
Cucinotta, Francis A.
(NASA Johnson Space Center Houston, TX, United States)
Date Acquired
August 24, 2013
Publication Date
January 1, 2008
Subject Category
Aerospace Medicine
Meeting Information
Meeting: 37th COSPAR Scientific Assembly, Montreal
Location: Montreal
Country: Canada
Start Date: July 13, 2008
End Date: July 20, 2008
Sponsors: Committee on Space Research
Distribution Limits
Public
Copyright
Other

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