Absorbed dose calculations in a brachytherapy pelvic phantom using the Monte Carlo method
| Autor: | Miguel L. Rodriguez, C. E. deAlmeida |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2002 |
| Předmět: |
Materials science
and phantoms medicine.medical_treatment Monte Carlo method Brachytherapy Imaging phantom Pelvis medicine Radiation Oncology Physics Humans Radiology Nuclear Medicine and imaging Instrumentation Radiation business.industry Phantoms Imaging Radiotherapy Planning Computer-Assisted Radiotherapy Dosage simulation Absorbed dose Anthropomorphic phantom Monte Carlo applications Radiotherapy Conformal Nuclear medicine business Dose rate Monte Carlo Method |
| Zdroj: | Journal of Applied Clinical Medical Physics |
| ISSN: | 1526-9914 |
| Popis: | Monte Carlo calculations of the absorbed dose at various points of a brachytherapy anthropomorphic phantom are presented. The phantom walls and internal structures are made of polymethylmethacrylate and its external shape was taken from a female Alderson phantom. A complete Fletcher‐Green type applicator with the uterine tandem was fixed at the bottom of the phantom reproducing a typical geometrical configuration as that attained in a gynecological brachytherapy treatment. The dose rate produced by an array of five 137Cs CDC‐J type sources placed in the applicator colpostats and the uterine tandem was evaluated by Monte Carlo simulations using the code penelope at three points: point A, the rectum, and the bladder. The influence of the applicator in the dose rate was evaluated by comparing Monte Carlo simulations of the sources alone and the sources inserted in the applicator. Differences up to 56% in the dose may be observed for the two cases in the planes including the rectum and bladder. The results show a reduction of the dose of 15.6%, 14.0%, and 5.6% in the rectum, bladder, and point A respectively, when the applicator wall and shieldings are considered. PACS number(s): 87.53Jw, 87.53.Wz, 87.53.Vb, 87.66.Xa |
| Databáze: | OpenAIRE |
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