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S values for selected radionuclides and organs with the heart wall and heart contents as source organs

Conference · · HHS Publ. (FDA) (U.S.); (United States)
OSTI ID:5919187
The generalized heart model of MIRD Pamphlet No. 5, Revised has no separation of heart wall from heart contents, and no phi values were listed for heart as either a source or target organ. Because of this, the heart model of the heterogeneous phantom for dosimetry calculations was revised and a description of this model and specific absorbed fractions will be published in MIRD Pamphlet No. 13. The purpose of this study is to use the specific absorbed fractions from MIRD-13 and decay scheme data to produce tables of S values (absorbed dose per unit cumulated activity) for selected radionuclides with the heart wall and heart contents as the source organs. As in the MIRD reports the activity is assumed to be uniformly distributed in the source organs. The phi values for the photon energies of a given radionuclide were found by lineraly interpolating between the energies listed in MIRD-13. When the source and target are the same, all nonpenetrating radiations are assumed to be absorbed in the organ in which they originate. For organs with walls and with the contents as the source, the dose to the wall from nonpenetrating radiations is assumed to be half of the dose to the contents.
Research Organization:
Oak Ridge Associated Univ., TN
OSTI ID:
5919187
Report Number(s):
CONF-801082-
Conference Information:
Journal Name: HHS Publ. (FDA) (U.S.); (United States) Journal Volume: 81-8166
Country of Publication:
United States
Language:
English