Earticle

초록

영어

Background: Stereotactic ablative radiotherapy (SABR) plans in prostate cancer are compared and analyzed to investigate the low magnetic effect (0.35 T) on the dose distribution, with various dosimetric parameters according to low magnetic field. Materials and Methods: Twenty patients who received a 36.25 Gy in five fractions using the MR-IGRT system (ViewRay) were studied. For planning target volume (PTV), the point mean dose (Dmean), maximum dose (Dmax), minimum dose (Dmin) and volumes receiving 100% (V100%), 95% (V95%), and 90% (V90%) of the total dose. For organs-at-risk (OARs), the differences compared using Dmax, V50%, V80%, V90%, and V100% of the rectum; Dmax, V50%, V30Gy, V100% of the bladder; and V30Gy of both left and right femoral heads. For both the outer and inner shells near the skin, Dmean, Dmin, and Dmax were compared. Results and Discussion: In PTV analysis, the maximum difference in volumes (V100%, V95%, and V90%) according to low magnetic field was 0.54 ± 0.63% in V100%. For OAR, there was no significant difference of dose distribution on account of the low magnetic field. In results of the shells, although there were no noticeable differences in dose distribution, the average difference of dose distribution for the outer shell was 1.28 ± 1.08 Gy for Dmax. Conclusion: In the PTV and OARs for prostate cancer, there are no statistically-significant differences between the plan calculated with and without a magnetic field. However, we confirm that the dose distribution significantly increases near the body shell when a magnetic field is applied.

목차

ABSTRACT
Introduction
Materials and Methods
1. Treatment system (ViewRay)
2. Description of prostate plans
3. Statistics Analysis
4. Plan evaluation by various parameters
Results
1. The difference of dose distribution in PTV
2. The difference of dose distribution in OARs
3. The difference of dose distribution near the skin
Discussion
Conclusion
Acknowledgements
References

키워드

저자

• Jaeman Son [ Department of Radiation Oncology, Seoul National University Hospital, Seoul, Korea ]
• Hyun Joon An [ Department of Radiation Oncology, Seoul National University Hospital, Seoul, Korea ]
• Chang Heon Choi [ Department of Radiation Oncology, Seoul National University Hospital, Seoul, Korea ]
• Eui Kyu Chie [ Department of Radiation Oncology, Seoul National University Hospital, Seoul, Korea; Biomedical Research Institute, Seoul National University Hospital, Seoul, Korea; Institute of Radiation Medicine, Seoul National University Medical Research Center, Seoul, Korea; Department of Radiation Oncology, Seoul National University College of Medicine, Seoul, Korea ]
• Jin Ho Kim [ Department of Radiation Oncology, Seoul National University Hospital, Seoul, Korea; Biomedical Research Institute, Seoul National University Hospital, Seoul, Korea; Institute of Radiation Medicine, Seoul National University Medical Research Center, Seoul, Korea ]
• Jong Min Park [ Department of Radiation Oncology, Seoul National University Hospital, Seoul, Korea; Biomedical Research Institute, Seoul National University Hospital, Seoul, Korea; Institute of Radiation Medicine, Seoul National University Medical Research Center, Seoul, Korea; Center for Convergence Research on Robotics, Advanced Institutes of Convergence Technology, Seoul Korea ]
• Jung-in Kim [ Department of Radiation Oncology, Seoul National University Hospital, Seoul, Korea; Biomedical Research Institute, Seoul National University Hospital, Seoul, 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