Earticle

초록

영어

Background: As breast tissue expanders consist of metallic materials in the needle guard and ferromagnetic injection port, irradiation can produce radioactivation. Materials and Methods: A CPX4 (Mentor Worldwide LLD) breast tissue expander was exposed using the Versa HD (Elekta) linear accelerator. Two photon energies of 6 and 10 MV-flattening filter free (FFF) beams with 5,000 monitor units (MU) were irradiated to identify the types of radiation. Furthermore, 300 MU with 10 MV-FFF beam was exposed to the CPX4 breast tissue expander by varying the machine dose rates (MDRs) 600, 1,200, and 2,200 MU/ min. To assess the instantaneous dose rates (IDRs) solely from the CPX4, a tissue expander was placed outside the treatment room after beam irradiation, and a portable radioisotope identification device was used to identify the types of radiation and measure IDR. Results and Discussion: After 5,000 MU delivery to the CPX4 breast tissue expander, the energy spectrum whose peak energy of 511 keV was found with 10 MV-FFF, while there was no resultant one with 6 MV-FFF. The time of each measurement was 1 minute, and the mean IDRs from the 10 MV-FFF were 0.407, 0.231, and 0.180 μSv/hr for the three successive measurements. Following 10 MV-FFF beam irradiation with 300 MU indicated around the background level from the first measurement regardless of MDRs. Conclusion: As each institute room entry time protocol varies according to the working hours and occupational doses, we suggest an addition of 1 minute from the institutes’ own room entry time protocol in patients with CPX4 tissue expander and the case of radiotherapy vaults equipped with a maximum energy of 10 MV photon beams.

목차

ABSTRACT
Introduction
Materials and Methods
1. Metallic Injection Port on Tissue Expander
2. Experiment Design
3. Measurement of Radioactivation
Results and Discussion
Conclusion
Conflict of Interest
Acknowledgements
Ethical Statement
Author Contribution
References

키워드

저자

• Hwajung Lee [ Department of Radiation Oncology, Chung-Ang University Gwangmyeong Hospital, Gwangmyeong, Korea; Institute of Radiation Medicine, Chung-Ang University Gwangmyeong Hospital, Gwangmyeong, Korea ]
• Do Hoon Oh [ Department of Radiation Oncology, Chung-Ang University Gwangmyeong Hospital, Gwangmyeong, Korea; Institute of Radiation Medicine, Chung-Ang University Gwangmyeong Hospital, Gwangmyeong, Korea ]
• Lee Yoo [ Department of Radiation Oncology, Chung-Ang University Gwangmyeong Hospital, Gwangmyeong, Korea; Institute of Radiation Medicine, Chung-Ang University Gwangmyeong Hospital, Gwangmyeong, Korea ]
• Minsoo Chun [ Department of Radiation Oncology, Chung-Ang University Gwangmyeong Hospital, Gwangmyeong, Korea; Institute of Radiation Medicine, Chung-Ang University Gwangmyeong Hospital, Gwangmyeong, Korea; Clinical Trial Support Team, Chung-Ang University Gwangmyeong Hospital, Gwangmyeong, Korea; Institute of Radiation Medicine, Seoul National University Medical Research Center, Seoul, Korea ] Corresponding Author

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