The Comparison 2D and 3D Treatment Planning in Breast Cancer Radiotherapy with Emphasis on Dose Homogeneity and Lung Dose

Publish Year: 1389
نوع سند: مقاله ژورنالی
زبان: English
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JR_IJMP-7-3_007

تاریخ نمایه سازی: 20 مهر 1398

Abstract:

Introduction: Breast conserving radiotherapy is one of the most common procedures performed in any radiation oncology department. A tangential parallel-opposed pair is usually used for this purpose. This technique is performed using 2D or 3D treatment planning systems. The aim of this study was to compare 2D treatment planning with 3D treatment planning in tangential irradiation in breast conserving radiotherapy. In this comparison, homogeneity of isodoses in the breast volume and lung dose were considered. Material and Methods: Twenty patients with breast cancer treated with conservative surgery were included in this study. The patients were CT scanned. Two-dimensional treatment planning with the Alfard 2D TPS was performed for each patient using a single central CT slice. The data used on the Alfard 2D TPS was imported into the Eclipse 3D TPS, on which 3D treatment planning was performed. Cobalt-60 beams were used in all plans. Results: Comparing 2D and 3D treatment planning, homogeneity of isodoses was improved in 3D treatment planning (p<0.02). Volume of lung receiving a dose of > 30Gy was increased in 3D treatment planning (p< 0.01). Discussion and Conclusion: 3D treatment planning is a more suitable option for patients with breast cancer treated with conservative surgery because of improved dose homogeneity in 3D treatment planning. The results of the treatment can be improved with reduced recurrence probability and skin problems.  

Authors

Zahra Falahatpour

M.Sc. graduate of Medical Radiation, Nuclear Engineering Dept., Faculty of Nuclear Engineering, Shahid Beheshti University, Tehran, Iran

Seyed Mahmood Reza Aghamiri

Associate Professor, Nuclear Engineering Dept., Faculty of Nuclear Engineering, Shahid Beheshti University, Tehran, Iran

Robab Anbiaee

Assistant Professor, Radiotherapy and Oncology Dept., Emam Hossein Hospital, Shahid Beheshti University, Tehran, Iran