Comparison of Photon-electron and Photon Radiotherapy for Supraclavicular Lymph Nodes of Mastectomy Patients with Left-sided Breast Cancer

Mehran Mohseni; Fatholah Mohaghegh; Nasrin Robatmili; Mohammad Reza Bayatiani; Fatemeh Seif; Nayyer Sadat Mostafavi

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자료유형: 학술저널

저자정보: Mehran Mohseni (Kashan University of Medical Sciences) Fatholah Mohaghegh (Arak University of Medical Sciences and Khansari Hospital) Nasrin Robatmili (Kashan University of Medical Sciences) Mohammad Reza Bayatiani (Arak University of Medical Sciences and Khansari Hospital) Fatemeh Seif (Arak University of Medical Sciences and Khansari Hospital) Nayyer Sadat Mostafavi (Isfahan University of Medical Sciences and Khansari Hospital)

저널정보: 대한암예방학회 대한암예방학회지 대한암예방학회지 제25권 제1호

발행연도: 2020.1

수록면: 48 - 54 (7page)

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The aim of radiotherapy is to deliver the highest possible radiation dose to the tumor and the lowest radiation to normal tissues surrounding the tumor. In the present study, lymph nodes of the supraclavicular region were treated using two therapeutic techniques, namely photon technique (PT) and combinatory photon-electron technique (CPET). We recruited 50 patients with local lymph node metastasis. The photon energies were 6-15 MV. Furthermore, the electron beam energy was 18 MeV in CPET. The study findings revealed that the mean delivered dose to target volume was 41.12 ± 2.98Gy for PT and 44.56 ± 1.90Gy for CPET. The percentage of the target volume irradiated to 90% of the prescribed dose (V90) was calculated as 74.61% ± 9.30% and 82.06% ± 9.70% for PT and CPET, respectively. The mean dose delivered to the heart and lungs was not significantly different between the two groups. Furthermore, the maximum doses delivered to the spinal cord were 12.55Gy in PT and 8.89Gy in CPET. The mean doses delivered to the thyroid gland were 39.26 and 34.89Gy in PT and CPET. According to the study results, the maximum doses delivered to the spinal cord, head of the humerus bone, and thyroid were reduced significantly as measured the CPET technique. In contrast, no significant difference was observed regarding the dose delivered to the heart and lung. The dose delivered to the supraclavicular region determined by the CPET was significantly augmented. Furthermore, the coverage of the tumor mass was optimized using the new method. Key Words Breast cancer, Treatment planning, Supraclavicular region dose, Thyroid dose

#Breast cancer #Treatment planning #Supraclavicular region dose #Thyroid dose

참고문헌 (18)

참고문헌 신청

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