Home Neoplasma 2010 Neoplasma Vol.57, No.4, p.369-376, 2010

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Neoplasma Vol.57, No.4, p.369-376, 2010

Title: Optimization and it’s influence on value of doses in HDR and PDR brachytherapy
Author: J. Skowronek, G. Zwierzchowski, T. Piotrowski, P. Milecki

Abstract: The aim of this work is to examine the influence of the dose optimization procedure on the value of radiation doses in organs of risk and to compare value of doses measured in healthy tissues according to chosen different PDR brachytherapy (PDRBT) and HDR brachytherapy (HDRBT) fractionation schedule. Fifty one patients treated with PDRBT were qualified for calculations. This group included patients with head and neck cancer, brain tumor, breast cancer, sarcoma, penile cancer and rectal cancer. The doses were calculated in chosen critical points in surrounded healthy tissues. For all treatment plans the doses were compared with the use of the BED (Biologically Equivalent Dose) formula and PDR along with HDR values were calculated. Differences among total doses in PDRBT and different schemas of HDRBT in critical points before and after dose point and volume optimization, were analyzed. The same dependences were examined also for BEDs. One ascertained that in biologic equivalent (to PDR) HDRBT the increase of fraction dose from 4 Gy to 10 Gy caused the necessity of decrease of total dose in treatment area (p

Keywords: BED, PDR brachytherapy, HDR brachytherapy, healthy tissues, optimization
Year: 2010, Volume: 57, Issue: 4 Page From: 369, Page To: 376
Price: 19.20 €

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