Title: Age-dependent comparison of monoenergetic photon organ and effective dose coefficients for pediatric stylized and voxel phantoms submerged in air

Abstract

We report that dose rate coefficients computed using the University of Florida-National Cancer Institute (UF-NCI) pediatric series of voxel phantoms were compared with values computed using the Oak Ridge National Laboratory (ORNL) pediatric stylized phantoms in an air submersion exposure geometry. Simulations were conducted comparing phantoms classified within five ages: newborn, 1-year-old, 5-year-old, 10-year-old, and 15-year-old for both male and female sexes. This is a continuation of previous work comparing monoenergetic photon organ dose rate coefficients, as defined by ICRP Publication 103, for the male and female adult phantoms. With both the male and female data computed for each pediatric phantom age, effective dose rate coefficients and ratios were computed for voxel and stylized phantoms. Organ dose rate coefficients for the pediatric phantoms and ratios of organ dose rates for the voxel and stylized phantoms are provided for eight monoenergetic photon energies ranging from 30 keV to 5 MeV. Analysis of the contribution of the organs to effective dose is also provided. Comparison of effective dose rates between the voxel and stylized phantoms was within 5% between 500 keV and 5 MeV and within 10% between 70 keV and 5 MeV for phantoms > 1-year-old. Lastly, stylized newborn effective dosemore » rates were consistently ~20% higher than the voxel counterpart, over all energies.« less

Authors:

Dewji, Shaheen Azim  ^[1];

• Search DOE PAGES for author "Dewji, Shaheen Azim"
• Search DOE PAGES for ORCID "0000-0002-3699-5877"

Bales, Kathryn E.  ^[1];

• Search DOE PAGES for author "Bales, Kathryn E."
• Search DOE PAGES for ORCID "0000-0001-7613-6017"

Griffin, Keith  ^[2];

• Search DOE PAGES for author "Griffin, Keith"
• Search DOE PAGES for ORCID "0000-0002-9628-3791"

Lee, Choonsik ^[2]; Hiller, Mauritius M  ^[3]

• Search DOE PAGES for author "Hiller, Mauritius M"
• Search DOE PAGES for ORCID "0000-0002-4435-0067"

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+ Show Author Affiliations

1. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Center for Radiation Protection Knowledge
2. National Cancer Institute, National Institutes of Health, Rockville, MD (United States). Division of Cancer Epidemiology and Genetics
3. Independent Researcher

Publication Date:

Fri Jul 27 00:00:00 EDT 2018

Research Org.:

Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)

Sponsoring Org.:

USDOE

OSTI Identifier:

1474622

Grant/Contract Number:  

AC05-00OR22725

Resource Type:

Accepted Manuscript

Journal Name:

Physics in Medicine and Biology (Online)

Additional Journal Information:

Journal Name: Physics in Medicine and Biology (Online); Journal Volume: 63; Journal Issue: 17; Journal ID: ISSN 1361-6560

Publisher:

IOP Publishing

Country of Publication:

United States

Language:

English

Subject:

61 RADIATION PROTECTION AND DOSIMETRY