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[Verification of Dose Distribution in Cervical Cancer Brachytherapy Using Metal and Plastic Applicators]
Fumihiro Tomita1,2, Hiraku Fuse2, Tatsuya Fujisaki2
1Graduate School of Health Sciences, Department of Radiological Sciences, Ibaraki Prefectural University of Health Sciences.
Purpose:
To validate the point-A dose and dose distribution of metal and resin applicators in comparison with those of TG-43U1.
Methods:
The metal and resin applicators consisting of tandem and ovoid were modeled by the egs_brachy. The doses to point A and dose distributions considering each applicator were calculated and compared to those of TG-43U1.
Results:
The dose to point A considering the metal applicator was 3.2% lower than that of TG-43U1, but there was no difference in the dose to point A considering the resin applicator. The dose distribution considering the metal applicator was lower than that of TG-43U1 at all calculation points, but there was no difference in the dose distribution considering the resin applicator at almost all calculation points.
Conclusion:
In this study, the dose distribution considering the metal applicator was lower than that of TG-43U1 at all calculation points, but there was no difference in the dose distribution considering the resin applicator at almost all calculation points. Therefore, TG-43U1 can accurately calculate the dose distribution when changing from the metal applicator to the resin applicator.
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