Dosimetric Evaluation of Target Volume in Breast Boost Radiotherapy: Comparison of Electron and Photon Beam

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Pourfallah Tayyeb; SHAHIDI MARYAM; Seifi Makrani Danial; MIHANDOUST EHSAN; Davodian Saeed

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Journal: JOURNAL OF MAZANDARAN UNIVERSITY OF MEDICAL SCIENCES Year:2019 | Volume:29 | Issue:175 Page(s): 65-75

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Title

Dosimetric Evaluation of Target Volume in Breast Boost Radiotherapy: Comparison of Electron and Photon Beam

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Keywords

breast cancer radiotherapyQ1

photon beamQ2

electron beamQ1

boost techniqueQ1

Abstract

Background and purpose: Breast‑ conserving surgery followed by radiation therapy to the whole breast is now recognized as a standard strategy in patients with breast cancer. Recommended technique for radiotherapy is whole breast irradiation followed by boost to the tumor bed. This study aimed to compare the dosimetric parameters of electron and photon beams for boosting irradiation in post‑ lumpectomy patients of breast cancer. Materials and methods: This analytical study included 50 patients of post-lumpectomy breast cancer. Treatment Planning System (TPS) was used to compare the plans for electron beam and photon beam boost irradiation. The organs at risk (OAR) consist of heart, ipsilateral lung, and skin. Targetvolume coverage, Conformity Index (CI), Homogeneity Index (HI), and doses to OAR were compared. Results: Photon plans represented a considerably better CI and HI for the planning target volumes (PTV), compared to the electron beam plans. Regarding OAR sparing, the V1Gy and Dmean in heart and ipsilateral lung with photon beam were significantly higher than electron beam (P<0. 05). Conclusion: Dosimetric analysis revealed that CI index, HI index, and PTV coverage were significantly better in photon boost plans, while OAR dosimetry conveyed a significant reduction in ipsilateral lung and heart doses with electron beam plans.

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APA: Copy

Pourfallah, Tayyeb, SHAHIDI, MARYAM, Seifi Makrani, Danial, MIHANDOUST, EHSAN, & Davodian, Saeed. (2019). Dosimetric Evaluation of Target Volume in Breast Boost Radiotherapy: Comparison of Electron and Photon Beam. JOURNAL OF MAZANDARAN UNIVERSITY OF MEDICAL SCIENCES, 29(175 ), 65-75. SID. https://sid.ir/paper/361016/en

Vancouver: Copy

Pourfallah Tayyeb, SHAHIDI MARYAM, Seifi Makrani Danial, MIHANDOUST EHSAN, Davodian Saeed. Dosimetric Evaluation of Target Volume in Breast Boost Radiotherapy: Comparison of Electron and Photon Beam. JOURNAL OF MAZANDARAN UNIVERSITY OF MEDICAL SCIENCES[Internet]. 2019;29(175 ):65-75. Available from: https://sid.ir/paper/361016/en

IEEE: Copy

Tayyeb Pourfallah, MARYAM SHAHIDI, Danial Seifi Makrani, EHSAN MIHANDOUST, and Saeed Davodian, “Dosimetric Evaluation of Target Volume in Breast Boost Radiotherapy: Comparison of Electron and Photon Beam,” JOURNAL OF MAZANDARAN UNIVERSITY OF MEDICAL SCIENCES, vol. 29, no. 175 , pp. 65–75, 2019, [Online]. Available: https://sid.ir/paper/361016/en

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