Specific absorbed fractions of energy at various ages from internal photon sources: 3, Five-year-old
Specific absorbed fractions (PHI's) in various organs of the body (target organs) from sources of monoenergetic photons in various other organs (source organs) are tabulated. In this volume PHI-values are tabulated for a five-year-old or 19-kg person. These PHI-values can be used in calculating the photon component of the dose-equivalent rate in a given target organ from a given radionuclide that is present in a given source organ. The International Commission on Radiological Protection recognizes that the endosteal, or bone surface, cells are the tissue at risk for bone cancer. We have applied the dosimetry methods developed for beta-emitting radionuclides deposited in bone to follow the transport of secondary electrons that were freed by photon interactions through the microscopic structure of the skeleton. With these methods we can estimate PHI in the endosteal cells and can better estimate PHI in the active marrow; the latter is overestimated with other methods at photon energies below 200 keV. 12 refs., 2 tabs.
- Research Organization:
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
- DOE Contract Number:
- AC05-84OR21400
- OSTI ID:
- 6263443
- Report Number(s):
- ORNL/TM-8381/V3; ON: DE87013347; TRN: 87-033042
- Resource Relation:
- Other Information: Portions of this document are illegible in microfiche products. Includes 1 sheet of 24x reduction microfiche
- Country of Publication:
- United States
- Language:
- English
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CRITICAL ORGANS
RADIATION DOSES
LUNGS
DOSIMETRY
COMPUTERIZED SIMULATION
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RADIATION DOSE DISTRIBUTIONS
REFERENCE MAN
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CATALOGS
CHILDREN
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MAMMALS
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MOCKUP
NUCLEAR MEDICINE
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655003* - Medical Physics- Dosimetry
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