| Dose conversion factors and linear energy transfer for irradiation of thin blood layers with low-energy X rays. | |
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MedLine Citation:
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PMID: 8265778 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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For irradiation of thin samples of biological material with low-energy X rays, conversion of measured air kerma, free in air to average absorbed dose to the sample is necessary. In the present paper, conversion factors from measured air kerma to average absorbed dose in thin blood samples are given for four low-energy X-ray qualities (14-50 kVp). These factors were obtained by Monte Carlo simulation of a practical sample holder. Data for different thicknesses of the blood and backing layer are presented. The conversion factors are found to depend strongly on the thicknesses of the blood layer and backing layer. In radiobiological work, knowledge of linear energy transfer (LET) values for the radiation quality used is often required. Track-averaged LET values for low-energy X rays are presented in this work. It is concluded that the thickness of the sample does not influence the LET value appreciably, indicating that for all radiobiological purposes this value can be regarded as a constant throughout the sample. Furthermore, the large difference between the LET value for a 50 kV spectrum found in this work and the value given in ICRU Report 16 is pointed out. |
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Authors:
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F Verhaegen; J Seuntjens |
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Publication Detail:
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Type: Journal Article; Research Support, Non-U.S. Gov't |
Journal Detail:
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Title: Radiation research Volume: 137 ISSN: 0033-7587 ISO Abbreviation: Radiat. Res. Publication Date: 1994 Jan |
Date Detail:
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Created Date: 1994-01-21 Completed Date: 1994-01-21 Revised Date: 2006-11-15 |
Medline Journal Info:
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Nlm Unique ID: 0401245 Medline TA: Radiat Res Country: UNITED STATES |
Other Details:
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Languages: eng Pagination: 11-7 Citation Subset: IM; S |
Affiliation:
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Department of Biomedical Physics, University of Gent, Belgium. |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Blood
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radiation effects* Dose-Response Relationship, Radiation Energy Transfer Humans Mathematics Models, Theoretical X-Rays |
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