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The NORMAN phantom vs. the BOMAB phantom: are they different?
Gary H Kramer1, Kevin Capello, Quoc Phan
1Human Monitoring Laboratory, Radiation Surveillance and Health Assessment Division, Radiation Protection Bureau, 775 Brookfield Road, PL6302D1, Ottawa, Ontario, Canada. gary_h_kramer@hc-sc.gc.ca
The NORMAN phantom was implemented with a Monte Carlo simulator and compared to the BOMAB phantom in whole body counting. Results show good agreement between the two phantoms across different counting systems.
Area of Science:
- Medical Physics
- Radiation Detection and Measurement
Background:
- Accurate calibration of whole body counters is crucial for internal dose assessment.
- The NORMAN phantom is a realistic anthropomorphic phantom used for calibration.
- Comparison with established phantoms like BOMAB is necessary to validate new phantoms.
Purpose of the Study:
- To implement the NORMAN phantom within the Human Monitoring Laboratory's Monte Carlo simulator.
- To compare the NORMAN phantom's performance with the BOMAB phantom in various whole body counting geometries.
- To assess the agreement and counting efficiencies between the two phantoms.
Main Methods:
- Implementation of the NORMAN phantom model in a Monte Carlo simulation.
- Comparison of NORMAN and BOMAB phantoms using three whole body counting (WBC) systems: WBC1 (scanning), WBC2 (stand-up), and WBC3 (stand-up).
- Analysis of counting efficiencies and agreement across different energy levels and geometries.
Main Results:
- Good agreement was observed between the NORMAN and BOMAB phantoms, with an average agreement factor of approximately 1.15 across all energies.
- The BOMAB phantom showed higher counting efficiency in WBC1 and WBC2 systems.
- The NORMAN phantom exhibited higher counting efficiency in the WBC3 system, indicating system-dependent variations.
Conclusions:
- The NORMAN phantom is a viable alternative to the BOMAB phantom for whole body counting applications.
- The study highlights the importance of considering phantom-BOMAB differences and counting geometry in calibration.
- Further validation across diverse counting systems is recommended for comprehensive assessment.
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