Evaluation of Breast Cancer Radiation Therapy Techniques in Outfield Organs of Rando Phantom with Thermoluminescence Dosimeter
Background: Given the importance of scattered and low doses in secondary cancer caused by radiation treatment, the point dose of critical organs, which were not subjected to radiation treatment in breast cancer radiotherapy, was measured. Objective: The purpose of this study is to evaluate the per...
| Main Authors: | , , , , , , |
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| Format: | Article |
| Language: | English |
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Shiraz University of Medical Sciences
2019-04-01
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| Series: | Journal of Biomedical Physics and Engineering |
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| Online Access: | http://jbpe.ir/Journal_OJS/JBPE/index.php/jbpe/article/view/1067/523 |
| _version_ | 1818471397313216512 |
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| author | Behmadi M. Gholamhosseinian H. Mohammadi M. Naseri Sh. Momennezhad M. Bayani Sh. Bahreyni Toossi M. T. |
| author_facet | Behmadi M. Gholamhosseinian H. Mohammadi M. Naseri Sh. Momennezhad M. Bayani Sh. Bahreyni Toossi M. T. |
| author_sort | Behmadi M. |
| collection | DOAJ |
| description | Background: Given the importance of scattered and low doses in secondary cancer caused by radiation treatment, the point dose of critical organs, which were not
subjected to radiation treatment in breast cancer radiotherapy, was measured.
Objective: The purpose of this study is to evaluate the peripheral dose in two
techniques of breast cancer radiotherapy with two energies.
Material and Methods: Eight different plans in two techniques (conventional
and conformal) and two photon energies (6 and 15 MeV) were applied to Rando
Alderson Phantom’s DICOM images. Nine organs were contoured in the treatment
planning system and specified on the phantom. To measure the photon dose, fortyeight thermoluminescence dosimeters (MTS700) were positioned in special places on
the above nine organs and plans were applied to Rando phantom with Elekta presice
linac. To obtain approximately the same dose distribution in the clinical organ volume, a wedge was used on planes with an energy of 6 MeV photon.
Results: Point doses in critical organs with 8 different plans demonstrated that
scattering in low-energy photon is greater than high-energy photon. In contrast,
neutron contamination in high-energy photon is not negligible. Using the wedge and
shield impose greater scattering and neutron contamination on patients with low-and
high-energy photon, respectively.
Conclusion: Deciding on techniques and energies required for preparing an
acceptable treatment plan in terms of scattering and neutron contamination is a key
issue that may affect the probability of secondary cancer in a patient. |
| first_indexed | 2024-04-14T03:50:20Z |
| format | Article |
| id | doaj.art-19aab340037f46cdb699f6a6bd69f275 |
| institution | Directory Open Access Journal |
| issn | 2251-7200 2251-7200 |
| language | English |
| last_indexed | 2024-04-14T03:50:20Z |
| publishDate | 2019-04-01 |
| publisher | Shiraz University of Medical Sciences |
| record_format | Article |
| series | Journal of Biomedical Physics and Engineering |
| spelling | doaj.art-19aab340037f46cdb699f6a6bd69f2752022-12-22T02:14:02ZengShiraz University of Medical SciencesJournal of Biomedical Physics and Engineering2251-72002251-72002019-04-0192179188Evaluation of Breast Cancer Radiation Therapy Techniques in Outfield Organs of Rando Phantom with Thermoluminescence DosimeterBehmadi M.0Gholamhosseinian H.1Mohammadi M.2Naseri Sh.3Momennezhad M.4Bayani Sh.5Bahreyni Toossi M. T.6Department of Medical Physics, Faculty of Medicine, Mashhad University of Medical Sciences, Mashhad, Iran.Medical Physics Research Center, Mashhad University of Medical Sciences, Mashhad, Iran.Royal Adelaide Hospital, Department of Medical Physics, Adelaide, AustraliaMedical Physics Research Center, Mashhad University of Medical Sciences, Mashhad, Iran.Nuclear Medicine Research Center, Mashhad University of Medical Sciences, Mashhad, IranDepartment of Medical Physics, Faculty of Medicine, Mashhad University of Medical Sciences, Mashhad, Iran.Medical Physics Research Center, Mashhad University of Medical Sciences, Mashhad, Iran.Background: Given the importance of scattered and low doses in secondary cancer caused by radiation treatment, the point dose of critical organs, which were not subjected to radiation treatment in breast cancer radiotherapy, was measured. Objective: The purpose of this study is to evaluate the peripheral dose in two techniques of breast cancer radiotherapy with two energies. Material and Methods: Eight different plans in two techniques (conventional and conformal) and two photon energies (6 and 15 MeV) were applied to Rando Alderson Phantom’s DICOM images. Nine organs were contoured in the treatment planning system and specified on the phantom. To measure the photon dose, fortyeight thermoluminescence dosimeters (MTS700) were positioned in special places on the above nine organs and plans were applied to Rando phantom with Elekta presice linac. To obtain approximately the same dose distribution in the clinical organ volume, a wedge was used on planes with an energy of 6 MeV photon. Results: Point doses in critical organs with 8 different plans demonstrated that scattering in low-energy photon is greater than high-energy photon. In contrast, neutron contamination in high-energy photon is not negligible. Using the wedge and shield impose greater scattering and neutron contamination on patients with low-and high-energy photon, respectively. Conclusion: Deciding on techniques and energies required for preparing an acceptable treatment plan in terms of scattering and neutron contamination is a key issue that may affect the probability of secondary cancer in a patient.http://jbpe.ir/Journal_OJS/JBPE/index.php/jbpe/article/view/1067/523Photon Dose MeasurementRadiation TherapyBreast CancerThermoluminescence DosimeterRando Phantom |
| spellingShingle | Behmadi M. Gholamhosseinian H. Mohammadi M. Naseri Sh. Momennezhad M. Bayani Sh. Bahreyni Toossi M. T. Evaluation of Breast Cancer Radiation Therapy Techniques in Outfield Organs of Rando Phantom with Thermoluminescence Dosimeter Journal of Biomedical Physics and Engineering Photon Dose Measurement Radiation Therapy Breast Cancer Thermoluminescence Dosimeter Rando Phantom |
| title | Evaluation of Breast Cancer Radiation Therapy Techniques in Outfield Organs of Rando Phantom with Thermoluminescence Dosimeter |
| title_full | Evaluation of Breast Cancer Radiation Therapy Techniques in Outfield Organs of Rando Phantom with Thermoluminescence Dosimeter |
| title_fullStr | Evaluation of Breast Cancer Radiation Therapy Techniques in Outfield Organs of Rando Phantom with Thermoluminescence Dosimeter |
| title_full_unstemmed | Evaluation of Breast Cancer Radiation Therapy Techniques in Outfield Organs of Rando Phantom with Thermoluminescence Dosimeter |
| title_short | Evaluation of Breast Cancer Radiation Therapy Techniques in Outfield Organs of Rando Phantom with Thermoluminescence Dosimeter |
| title_sort | evaluation of breast cancer radiation therapy techniques in outfield organs of rando phantom with thermoluminescence dosimeter |
| topic | Photon Dose Measurement Radiation Therapy Breast Cancer Thermoluminescence Dosimeter Rando Phantom |
| url | http://jbpe.ir/Journal_OJS/JBPE/index.php/jbpe/article/view/1067/523 |
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