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Physical models and dose factors for use in internal dose assessment
Michael G Stabin1, Jeffry A Siegel
1Department of Radiology and Radiological Sciences, Vanderbilt University, Nashville, TN 37232, USA. michael.g.stabin@vanderbilt.edu
Health Physics
|August 27, 2003
Summary
This study introduces a unified method for internal dose calculations using updated decay data and human body models. It provides comprehensive dose factors for over 800 radionuclides, improving accuracy for nuclear medicine and occupational health.
Area of Science:
- Medical Physics
- Radiological Dosimetry
- Nuclear Medicine
Background:
- Internal dose assessment relies on mathematical models and dose calculation formulas.
- Existing methods for internal dose calculations in nuclear medicine and occupational health are complex and fragmented.
Purpose of the Study:
- To present a simple, unified method for internal dose calculations.
- To provide updated dose factors for internal dose assessment using current data and models.
- To update nuclear medicine dose factors since MIRD Pamphlet No. 11 (1975).
Main Methods:
- Combined decay data for over 800 radionuclides with absorbed fraction data from mathematical human body and organ models.
- Utilized updated phantoms and recently suggested corrections for bone and marrow dose factors.
- Employed an electronic publishing approach for data distribution.
Main Results:
- Generated dose factors for internal dose assessment, including data for alpha emitters.
- Updated dose factors for bone and marrow using new models and corrections.
- The new dose factors show good agreement with previously published values, indicating accuracy.
Conclusions:
- The developed method and updated dose factors offer a simplified and accurate approach to internal dose assessment.
- Electronic distribution facilitates access to extensive dose factor data.
- This work represents a significant update for nuclear medicine and occupational internal dose systems.