Earticle

초록

영어

Background: Whole-body counters are widely used to evaluate internal contamination of the internal presence of gamma-emitting radionuclides. In internal dosimetry, it is a basic requirement that quality control procedures be applied to verify the reliability of the measured results. The implementation of intercomparison programs plays an important role in quality control, and the accuracy of the calibration and the reliability of the results should be verified through intercomparison. In this study, we evaluated the reliability of 2 whole-body counting systems using 2 calibration methods. Materials and Methods: In this study, 2 whole-body counters were calibrated using a reference male bottle manikin absorption (BOMAB) phantom and a Radiation Management Corporation (RMC-II) phantom. The reliability of the whole-body counting systems was evaluated by performing an intercomparison with International Atomic Energy Agencyto assess counting efficiency according to the type of the phantom. Results and Discussion: In the analysis of counting efficiency using the BOMAB phantom, the performance criteria of the counters were satisfied. The relative bias of activity for all radionuclides was -0.16 to 0.01 in the Fastscan and -0.01 to 0.03 in the Accuscan. However, when counting efficiency was analyzed using the RMC- II phantom, the relative bias of 241Am activity was -0.49 in the Fastscan and 0.55 in the Accuscan, indicating that its performance criteria was not satisfactory. Conclusion: The intercomparison process demonstrated the reliability of whole-body counting systems calibrated with a BOMAB phantom. However, when the RMC-II phantom was used, the accuracy of measurements decreased for low-energy nuclides. Therefore, it appears that the RMC-II phantom should only be used for efficiency calibration for high-energy nuclides. Moreover, a novel phantom capable of matching the efficiency of the BOMAB phantom in low- energy nuclides should be developed.

목차

ABSTRACT
 Introduction
 Materials and Methods
  1. Whole-body counters
  2. Efficiency calibration of whole-body counters
  3. Performance verification of the whole-body counters using the BOMAB phantom
  4. Intercomparison of whole-body counters using sliced BOMAB phantoms
 Results and Discussion
  1. Results of the efficiency calibrations of the whole-bodycounters
  2. Performance testing of whole-body counters using a BOMAB phantom for validation
  3. Results of intercomparison analysis using sliced BOMAB phantoms
 Conclusion
 Acknowledgments
 References

키워드

저자

• Minjung Pak [ Korea Institute of Radiological and Medical Sciences, Seoul, Korea ]
• Jaeryong Yoo [ Korea Institute of Radiological and Medical Sciences, Seoul, Korea ]
• Wi-Ho Ha [ Korea Institute of Radiological and Medical Sciences, Seoul, Korea ] Corresponding author
• Young-Woo Jin [ Korea Institute of Radiological and Medical Sciences, Seoul, Korea ]

참고문헌

발행기관

간행물

표지보기 관심저널 등록

• 간행물명

  방사선방어학회지 [Journal of Radiation Protection and Research]

• 간기

  계간

• pISSN

  2508-1888

• 수록기간

  1976~2026

• 등재여부

  KCI 등재,SCOPUS

• 십진분류

  KDC 559 DDC 629