Dosimetric Comparison of 3D Tangential Radiotherapy of Post-Lumpectomy Breast at Two Different Energies
Introduction: Radiation therapy following breast conserving surgery is one of the most common procedures performed in any radiation oncology department. A tangential parallel-opposed pair is almost always the technique of choice for this purpose. This technique is often performed based on 3D treatme...
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| Format: | Article |
| Language: | English |
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Mashhad University of Medical Sciences
2011-06-01
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| Series: | Iranian Journal of Medical Physics |
| Subjects: | |
| Online Access: | http://ijmp.mums.ac.ir/article_7210_8cba514c850e3a13b52eea7649313537.pdf |
| _version_ | 1811269701770149888 |
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| author | Robab Anbiaee Seyed Mahmoud Reza Aghamiri Zahra Falahatpour |
| author_facet | Robab Anbiaee Seyed Mahmoud Reza Aghamiri Zahra Falahatpour |
| author_sort | Robab Anbiaee |
| collection | DOAJ |
| description | Introduction: Radiation therapy following breast conserving surgery is one of the most common procedures performed in any radiation oncology department. A tangential parallel-opposed pair is almost always the technique of choice for this purpose. This technique is often performed based on 3D treatment planning. The aim of this study was to compare 3D treatment planning for two different energies (Cobalt 60 versus 6 MV photon beams) in tangential irradiation of breast conserving radiotherapy. In this comparison, homogeneity of isodoses within the breast volume and dose received by lungs were considered. Materials and Methods: In this study, twenty patients with breast cancer treated with conservative surgery were included. A CT scan was performed on selected patients. Three-dimensional treatment planning with 6 MV photon beams was carried out for patients on the Eclipse 3D treatment planning system (TPS). The volumes receiving lower than 95% (Vol105) (hot areas) of the reference dose, and the volume of lung receiving ≥30Gy (Vol≥30Gy) were derived from dose volume histograms (DVHs). Dose homogeneity index was calculated as: DHI = 100 – (Vol>105 + Vol |
| first_indexed | 2024-04-12T21:47:47Z |
| format | Article |
| id | doaj.art-b99c4d35f7ed4e1b96cecb105f1dff9c |
| institution | Directory Open Access Journal |
| issn | 2345-3672 2345-3672 |
| language | English |
| last_indexed | 2024-04-12T21:47:47Z |
| publishDate | 2011-06-01 |
| publisher | Mashhad University of Medical Sciences |
| record_format | Article |
| series | Iranian Journal of Medical Physics |
| spelling | doaj.art-b99c4d35f7ed4e1b96cecb105f1dff9c2022-12-22T03:15:35ZengMashhad University of Medical SciencesIranian Journal of Medical Physics2345-36722345-36722011-06-01821810.22038/ijmp.2011.72107210Dosimetric Comparison of 3D Tangential Radiotherapy of Post-Lumpectomy Breast at Two Different EnergiesRobab Anbiaee0Seyed Mahmoud Reza Aghamiri1Zahra Falahatpour2Assistant Professor, Radiotherapy and Oncology Dept., Imam Hossein Hospital, Shahid Beheshti University, Tehran, IranAssociate Professor, Nuclear Engineering-Medical Radiation Dept., Faculty of Nuclear Engineering, Shahid Beheshti University, Tehran, IranM.Sc in Nuclear Engineering-Medical Radiation, Faculty of Nuclear Engineering, Shahid Beheshti University, Tehran, IranIntroduction: Radiation therapy following breast conserving surgery is one of the most common procedures performed in any radiation oncology department. A tangential parallel-opposed pair is almost always the technique of choice for this purpose. This technique is often performed based on 3D treatment planning. The aim of this study was to compare 3D treatment planning for two different energies (Cobalt 60 versus 6 MV photon beams) in tangential irradiation of breast conserving radiotherapy. In this comparison, homogeneity of isodoses within the breast volume and dose received by lungs were considered. Materials and Methods: In this study, twenty patients with breast cancer treated with conservative surgery were included. A CT scan was performed on selected patients. Three-dimensional treatment planning with 6 MV photon beams was carried out for patients on the Eclipse 3D treatment planning system (TPS). The volumes receiving lower than 95% (Vol105) (hot areas) of the reference dose, and the volume of lung receiving ≥30Gy (Vol≥30Gy) were derived from dose volume histograms (DVHs). Dose homogeneity index was calculated as: DHI = 100 – (Vol>105 + Volhttp://ijmp.mums.ac.ir/article_7210_8cba514c850e3a13b52eea7649313537.pdfBreast cancerCobalt 60Tangential Irradiation3D Treatment Planning6MV Photon Beam |
| spellingShingle | Robab Anbiaee Seyed Mahmoud Reza Aghamiri Zahra Falahatpour Dosimetric Comparison of 3D Tangential Radiotherapy of Post-Lumpectomy Breast at Two Different Energies Iranian Journal of Medical Physics Breast cancer Cobalt 60 Tangential Irradiation 3D Treatment Planning 6MV Photon Beam |
| title | Dosimetric Comparison of 3D Tangential Radiotherapy of Post-Lumpectomy Breast at Two Different Energies |
| title_full | Dosimetric Comparison of 3D Tangential Radiotherapy of Post-Lumpectomy Breast at Two Different Energies |
| title_fullStr | Dosimetric Comparison of 3D Tangential Radiotherapy of Post-Lumpectomy Breast at Two Different Energies |
| title_full_unstemmed | Dosimetric Comparison of 3D Tangential Radiotherapy of Post-Lumpectomy Breast at Two Different Energies |
| title_short | Dosimetric Comparison of 3D Tangential Radiotherapy of Post-Lumpectomy Breast at Two Different Energies |
| title_sort | dosimetric comparison of 3d tangential radiotherapy of post lumpectomy breast at two different energies |
| topic | Breast cancer Cobalt 60 Tangential Irradiation 3D Treatment Planning 6MV Photon Beam |
| url | http://ijmp.mums.ac.ir/article_7210_8cba514c850e3a13b52eea7649313537.pdf |
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