Measurement of ipsilateral lung and heart dose in radiotherapy of left sided mastectomy patient's in common different clinical techniques: A phantom study
International Journal of Radiation Research. 2018; 16 (3): 389-394
de En
| IMEMR
| ID: emr-204968
Bibliothèque responsable:
EMRO
Background: the aim of this study was to compare the radiation dose to ipsilateral lung and heart for different radiotherapy [RT] techniques including; two tangential photon beams, electron therapy and combined photon-electron
Materials and Methods: treatment planning of the mentioned techniques on the CT images of a chest phantom was done using treatment planning system [TiGRT, Lina Tech, China]. According to the plans, the phantom was irradiated with 6 MV photon and 10 MeV electron beams of Siemens Primus linac. Radiation dose was also measured using LiF Thermo Luminescence Dosimeter [TLD] which was placed inside 3 mm depth holes of ipsilateral lung and heart on the phantom
Results: the mean [ +/- SD] radiation dose to the ipsilateral lung of the combined photon-electron was 66.12 +/- 5.16% of prescribed dose. Whereas for the heart, it was 64.05 +/- 2.62%. Mean [ +/- SD] dose of ipsilateral lung and heart for electron irradiation was 54.51 +/- 3.88 % and 34.21 +/- 3.41%, respectively. The mean [ +/- SD] radiation dose to ipsilateral lung and heart of the tangential was 50.73 +/- 3.01 % and 31.36 +/- 3.13%, respectively. The mean [ +/- SD] radiation dose to the chest wall-lung interface for electron therapy [72.44 +/- 2.01 %] was significantly different in comparison with tangential [65.23 +/- 4.20%; p = 0.045] and combined photon-electron [68.14 +/- 3.53 %; p = 0.032]
Conclusion: tangential beams is more suitable for treating mastectomy patients compared to the other techniques such as electron therapy and combined photon-electron, due to lower radiation dose to patient's ipsilateral lung and heart
Materials and Methods: treatment planning of the mentioned techniques on the CT images of a chest phantom was done using treatment planning system [TiGRT, Lina Tech, China]. According to the plans, the phantom was irradiated with 6 MV photon and 10 MeV electron beams of Siemens Primus linac. Radiation dose was also measured using LiF Thermo Luminescence Dosimeter [TLD] which was placed inside 3 mm depth holes of ipsilateral lung and heart on the phantom
Results: the mean [ +/- SD] radiation dose to the ipsilateral lung of the combined photon-electron was 66.12 +/- 5.16% of prescribed dose. Whereas for the heart, it was 64.05 +/- 2.62%. Mean [ +/- SD] dose of ipsilateral lung and heart for electron irradiation was 54.51 +/- 3.88 % and 34.21 +/- 3.41%, respectively. The mean [ +/- SD] radiation dose to ipsilateral lung and heart of the tangential was 50.73 +/- 3.01 % and 31.36 +/- 3.13%, respectively. The mean [ +/- SD] radiation dose to the chest wall-lung interface for electron therapy [72.44 +/- 2.01 %] was significantly different in comparison with tangential [65.23 +/- 4.20%; p = 0.045] and combined photon-electron [68.14 +/- 3.53 %; p = 0.032]
Conclusion: tangential beams is more suitable for treating mastectomy patients compared to the other techniques such as electron therapy and combined photon-electron, due to lower radiation dose to patient's ipsilateral lung and heart
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Indice:
IMEMR
langue:
En
Texte intégral:
Int. J. Radiat. Res.
Année:
2018