Development and comparison of computational models for estimation of absorbed organ radiation dose in rainbow trout (Oncorhynchus mykiss) from uptake of iodine-131

Details

• Personal Author:
  Capello K ; Johnson TE ; Martinez NE ; Pinder JE III
• Description:
  This study develops and compares different, increasingly detailed anatomical phantoms for rainbow trout (Oncorhynchus mykiss) for the purpose of estimating organ absorbed radiation dose and dose rates from (131)I uptake in multiple organs. The models considered are: a simplistic geometry considering a single organ, a more specific geometry employing additional organs with anatomically relevant size and location, and voxel reconstruction of internal anatomy obtained from CT imaging (referred to as CSUTROUT). Dose Conversion Factors (DCFs) for whole body as well as selected organs of O. mykiss were computed using Monte Carlo modeling, and combined with estimated activity concentrations, to approximate dose rates and ultimately determine cumulative radiation dose (uGy) to selected organs after several half-lives of (131)I. The different computational models provided similar results, especially for source organs (less than 30% difference between estimated doses), and whole body DCFs for each model (approximately 3 × 10(-3) uGy d(-1) per Bq kg(-1)) were comparable to DCFs listed in ICRP 108 for (131)I. The main benefit provided by the computational models developed here is the ability to accurately determine organ dose. A conservative mass-ratio approach may provide reasonable results for sufficiently large organs, but is only applicable to individual source organs. Although CSUTROUT is the more anatomically realistic phantom, it required much more resource dedication to develop and is less flexible than the stylized phantom for similar results. There may be instances where a detailed phantom such as CSUTROUT is appropriate, but generally the stylized phantom appears to be the best choice for an ideal balance between accuracy and resource requirements. [Description provided by NIOSH]
• Subjects:
  Anatomy Animals Hunting Occupational Health Quality Control Radiation Radiation Dosimeters Safety
• Keywords:
  Absorption-rates Analytical-models Author Keywords: Radiation Dosimetry Biologic-half-life Dosimetry Fishing-industry Iodine-131 Mathematical-models Models Monte Carlo Organs Quality-standards Radiation-exposure Radiation-levels Radiation-measurement Radiation-properties Rainbow Trout Thyroid-gland Thyroid-gland-disorders Whole-body-radiation

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• ISSN:
  0265-931X
• Document Type:
  Text
• Funding:
  Grant
• Genre:
  Journal Article
• Place as Subject:
  Colorado ; OSHA Region 4 ; OSHA Region 8 ; South Carolina
• CIO:
  National Institute for Occupational Safety and Health (NIOSH)
• Topic:
  Workplace Safety & Health
• Location:
  North America
• Pages in Document:
  50-59
• Volume:
  138
• NIOSHTIC Number:
  nn:20046459
• Citation:
  J Environ Radioact 2014 Dec; 138:50-59
• Contact Point Address:
  Nicole E. Martinez, Department of Environmental and Radiological Health Science, Colorado State University, 1618 Campus Delivery, Fort Collins, CO 80523
• Email:
  n.martinez@colostate.edu
• CAS Registry Number:
  Iodine (CAS RN 7553-56-2)
• Federal Fiscal Year:
  2015
• Performing Organization:
  University of Colorado, Denver
• Peer Reviewed:
  True
• Start Date:
  20070701
• Source Full Name:
  Journal of Environmental Radioactivity
• End Date:
  20250630
• Collection(s):
  National Institute for Occupational Safety and Health
• Main Document Checksum:
  urn:sha-512:1763bad970742c1acee770866b2d715a2d72b484068f8e790b8c4e18920ff6dab9f7f345679f389f2445e96e7c908370687ba1cdfa663e5e2e73c1e38f530e4e
• Download URL:
  https://stacks.cdc.gov/view/cdc/201513/cdc_201513_DS1.pdf
• File Type:
  [PDF - 1.10 MB ]