Specific absorbed fractions of energy at various ages from internal photon sources: 4, Ten-year-old

Technical Report · Wed Apr 01 04:00:00 EST 1987

DOI:https://doi.org/10.2172/6233673· OSTI ID:6233673

Cristy, M.; Eckerman, K. F.

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 ten-year-old or 32-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 that Spiers and co-workers 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., TN (USA)
• DOE Contract Number: AC05-84OR21400
• OSTI ID: 6233673
• Report Number(s): ORNL/TM-8381/V4; ON: DE87013348
• Country of Publication: United States
• Language: English

Related Subjects

550604 -- Medicine-- Unsealed Radionuclides in Therapy-- (1980-)
61 RADIATION PROTECTION AND DOSIMETRY
62 RADIOLOGY AND NUCLEAR MEDICINE
655003* -- Medical Physics-- Dosimetry
ABSORPTION
AGE GROUPS
ANIMALS
BODY
CATALOGS
CHILDREN
COMPUTERIZED SIMULATION
CRITICAL ORGANS
DOCUMENT TYPES
DOSE EQUIVALENTS
DOSES
DOSIMETRY
DRUGS
ELEMENTARY PARTICLES
ENERGY ABSORPTION
INTERNAL IRRADIATION
IRRADIATION
LABELLED COMPOUNDS
LUNGS
MAMMALS
MAN
MASSLESS PARTICLES
MEDICINE
MOCKUP
NUCLEAR MEDICINE
ORGANS
PHANTOMS
PHOTONS
PRIMATES
RADIATION DOSE DISTRIBUTIONS
RADIATION DOSES
RADIOLOGY
RADIOPHARMACEUTICALS
RADIOTHERAPY
REFERENCE MAN
RESPIRATORY SYSTEM
SIMULATION
SKELETON
STRUCTURAL MODELS
THERAPY
TISSUES
VERTEBRATES