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KMID : 1164220190310010051
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Journal of Korean Society for Radiotherapeutic Technology
2019 Volume.31 No. 1 p.51 ~ p.56
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A Study on the Treatment of Combine Electron Beam in the Treatment of Breast Cancer Tumor Bed
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Lee Geon-Ho
Kang Hyo-Seok
Choi Byoung-Joon
Park Sang-Jun
Jung Da-Ee
Lee Du-Sang
Ahn Min-Woo
Jeon Myeong-Su
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Abstract
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Purpose : The usefulness of using single-electron radiation for secondary radiotherapy of breast cancer patients after surgery is assessed and the use of a combine of different energy.
Methods and materials : In this study, 40 patients (group A) using energy 6 MeV and 9 MeV, and 19 patients (group B) using a combine of 9 MeV and 12 MeV were studied among 59 patients who performed secondary care using combine electronic radiation. Each patient in each group, 6 MeV, 9 MeV, Combine(6 MeV / 9 MeV) and 9 MeV, 12 MeV, Combine (9 MeV / 12 MeV) were developed in different ways, and the maximum doses delivered to the original hospital, D95, D5, and V3, V5, V10 were compared.
Result : The D95 mean value of Group A treatment plan was 785.33±225.37 cGy, 1121.79±87.02 cGy at 9 MeV, and 1010.98±111.17 cGy at 6 MeV / 9 MeV, and the mean value at 6 MeV / 9 MeV was most appropriate for the dose. The mean values of the low dose area V3 and V5 in the lung of the breast direction being treated were 3.24±3.49 % and 0.72±1.55 % at 6 MeV, the highest 9 MeV at 7.25±4.59 %, 3.07±2.64 %, the lowest at 6 MeV. Maximum and average lung dose was 727.78±137.27 cGy at 6 MeV / 9 MeV, 49.16±24.44 cGy, highest 9 MeV at 998.97±114.35 cGy, 85.33±41.18 cGy, and lowest 6 MeV at 387.78±208.88 cGy, 9.27±6.60 cGy. The value of V10 was all close to zero. Group B appeared in the pattern of Group A.
Conclusion : Relative differences in low-dose areas of the lungs V3 and V5 were seen and were most effective in the dose transfer of tumor bed in the application of combined energy. It is thought that the method of using electronic energy in further radiation treatments for breast cancer is a more effective way to use the energy effect of limiting energy resources, and that if you think about it again, it could be a little more beneficial radiation treatment for patients.
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KEYWORD
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Breast Cancer, Tumor bed, Combined Electron Beam
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