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Dosimetric Comparison of Three Radiotherapy Techniques in Irradiation of Left-Sided Breast Cancer Patients after Radical Mastectomy. 2020

Jian Hu, and Guang Han, and Yu Lei, and Ximing Xu, and Wei Ge, and Changli Ruan, and Sheng Chang, and Aihua Zhang, and Xiangpan Li
Department of Radiation Oncology, Wuhan University, Renmin Hospital, Wuhan, 430060 Hubei Province, China.

RESULTS The VMAT plans showed superior to PTV dose conformity index (CI), homogeneity index (HI), protection of the ipsilateral lung, monitor units (MUs), and maximum dose (Dmax) to the contralateral breast compared with TSP and 9FIMRT plans. The TSP provided better protection for Dmean of the heart and left ventricle (p < 0.05). A dose for left anterior descending artery from the three techniques had no significant difference. Compared with the 9FIMRT plans, the V5Gy (%) and V10Gy (%) for the ipsilateral lung were significantly reduced with TSP and VMAT (p < 0.05). The V5Gy (%) and V10Gy (%) for the ipsilateral lung turned out to be similar between VMAT and TSP techniques. CONCLUSIONS Our study indicates that VMAT should be a better choice of radiotherapy for left-sided breast cancer patients after radical mastectomy. If VMAT is unavailable, 9FIMRT can achieve better CI and HI values and be more MU-efficient compared with TSP; however, TSP can effectively reduce the low dose volume of the ipsilateral lungs and heart.

UI MeSH Term Description Entries
D008875 Middle Aged An adult aged 45 - 64 years. Middle Age
D011879 Radiotherapy Dosage The total amount of radiation absorbed by tissues as a result of radiotherapy. Dosage, Radiotherapy,Dosages, Radiotherapy,Radiotherapy Dosages
D011880 Radiotherapy Planning, Computer-Assisted Computer-assisted mathematical calculations of beam angles, intensities of radiation, and duration of irradiation in radiotherapy. Computer-Assisted Radiotherapy Planning,Dosimetry Calculations, Computer-Assisted,Planning, Computer-Assisted Radiotherapy,Calculation, Computer-Assisted Dosimetry,Calculations, Computer-Assisted Dosimetry,Computer Assisted Radiotherapy Planning,Computer-Assisted Dosimetry Calculation,Computer-Assisted Dosimetry Calculations,Dosimetry Calculation, Computer-Assisted,Dosimetry Calculations, Computer Assisted,Planning, Computer Assisted Radiotherapy,Radiotherapy Planning, Computer Assisted
D005260 Female Females
D006801 Humans Members of the species Homo sapiens. Homo sapiens,Man (Taxonomy),Human,Man, Modern,Modern Man
D000069584 Unilateral Breast Neoplasms Tumors or cancer found specifically in one human BREAST, but not in both. Left Sided Breast Cancer,Left Sided Breast Neoplasm,Left Sided Breast Neoplasms,Left-Sided Breast Cancer,Left-Sided Breast Neoplasms,Right Sided Breast Cancer,Right Sided Breast Neoplasm,Right-Sided Breast Cancer,Right-Sided Breast Neoplasms,Unilateral Breast Cancer,Breast Cancer, Left-Sided,Breast Cancer, Right-Sided,Breast Cancer, Unilateral,Breast Cancers, Left-Sided,Breast Cancers, Right-Sided,Breast Cancers, Unilateral,Breast Neoplasm, Left-Sided,Breast Neoplasm, Right-Sided,Breast Neoplasm, Unilateral,Breast Neoplasms, Left-Sided,Breast Neoplasms, Right-Sided,Breast Neoplasms, Unilateral,Left-Sided Breast Cancers,Left-Sided Breast Neoplasm,Right Sided Breast Neoplasms,Right-Sided Breast Cancers,Right-Sided Breast Neoplasm,Unilateral Breast Cancers
D000328 Adult A person having attained full growth or maturity. Adults are of 19 through 44 years of age. For a person between 19 and 24 years of age, YOUNG ADULT is available. Adults
D000368 Aged A person 65 years of age or older. For a person older than 79 years, AGED, 80 AND OVER is available. Elderly
D015409 Mastectomy, Radical Removal of the breast, pectoral muscles, axillary lymph nodes, and associated skin and subcutaneous tissue. Halsted Mastectomy,Meyer Mastectomy,Mastectomies, Radical,Mastectomy, Halsted,Mastectomy, Meyer,Radical Mastectomies,Radical Mastectomy
D050397 Radiotherapy, Intensity-Modulated CONFORMAL RADIOTHERAPY that combines several intensity-modulated beams to provide improved dose homogeneity and highly conformal dose distributions. Helical Tomotherapy,Intensity-Modulated Arc Therapy,Volumetric-Modulated Arc Therapy,Arc Therapies, Intensity-Modulated,Arc Therapies, Volumetric-Modulated,Arc Therapy, Intensity-Modulated,Arc Therapy, Volumetric-Modulated,Helical Tomotherapies,Intensity Modulated Arc Therapy,Intensity-Modulated Arc Therapies,Intensity-Modulated Radiotherapies,Intensity-Modulated Radiotherapy,Radiotherapies, Intensity-Modulated,Radiotherapy, Intensity Modulated,Therapies, Intensity-Modulated Arc,Therapies, Volumetric-Modulated Arc,Therapy, Intensity-Modulated Arc,Therapy, Volumetric-Modulated Arc,Tomotherapies, Helical,Tomotherapy, Helical,Volumetric Modulated Arc Therapy,Volumetric-Modulated Arc Therapies

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