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To determine the source dwell positions of HDR brachytherapy using 2D 729 ion chamber array

To determine the source dwell positions of HDR brachytherapy using 2D 729 ion chamber array AbstractThe purpose of this study was to determine the dwell position of a high-dose-rate (HDR) brachytherapy Ir-192 source using a PTW Seven29 2D detector array. A Nucletron Microselectron HDR device and 2D array ionisation chamber, equipped with 729 ionisation chambers uniformly arranged in a 27×27 matrix with an active array area of 27×27 cm2, were used for this study. Different dwell positions were assigned in the HDR machine. Rigid interstitial needles and a vaginal applicator were positioned on the 2D array, which was then exposed according to the programmed dwell positions. Subsequently, the positional accuracy of the source position was analysed. This process was repeated for different dwell positions. The results were analysed using an in-house-developed Excel programme. Different random dwell position checks as well as dwell position measurements were performed using a radiochromic film. The dwell positions measured by the 2D array were found to be in good agreement with those measured by the film. The standard deviations between the doses obtained from the different dwell positions were 0·191828, 0·329973, 0·370632 and 0·779939, whereas the corresponding standard deviations of the doses at the vaginal cylinder were 0·60303, 0·242808, 0·242808 and 0·065309. When the planned and measured dwell positions were plotted, a linear relationship was obtained. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Journal of Radiotherapy in Practice Cambridge University Press

To determine the source dwell positions of HDR brachytherapy using 2D 729 ion chamber array

Journal of Radiotherapy in Practice , Volume 14 (4): 7 – Aug 26, 2015
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Publisher
Cambridge University Press
Copyright
© Cambridge University Press 2015 
ISSN
1467-1131
eISSN
1460-3969
DOI
10.1017/S1460396915000382
Publisher site
See Article on Publisher Site

Abstract

AbstractThe purpose of this study was to determine the dwell position of a high-dose-rate (HDR) brachytherapy Ir-192 source using a PTW Seven29 2D detector array. A Nucletron Microselectron HDR device and 2D array ionisation chamber, equipped with 729 ionisation chambers uniformly arranged in a 27×27 matrix with an active array area of 27×27 cm2, were used for this study. Different dwell positions were assigned in the HDR machine. Rigid interstitial needles and a vaginal applicator were positioned on the 2D array, which was then exposed according to the programmed dwell positions. Subsequently, the positional accuracy of the source position was analysed. This process was repeated for different dwell positions. The results were analysed using an in-house-developed Excel programme. Different random dwell position checks as well as dwell position measurements were performed using a radiochromic film. The dwell positions measured by the 2D array were found to be in good agreement with those measured by the film. The standard deviations between the doses obtained from the different dwell positions were 0·191828, 0·329973, 0·370632 and 0·779939, whereas the corresponding standard deviations of the doses at the vaginal cylinder were 0·60303, 0·242808, 0·242808 and 0·065309. When the planned and measured dwell positions were plotted, a linear relationship was obtained.

Journal

Journal of Radiotherapy in Practice – Cambridge University Press

Published: Aug 26, 2015

Keywords: afterloading; applicators; HDR brachytherapy; 2D array

References

  • A quality assurance tool for high dose rate brachytherapy
  • High dose rate brachytherapy in the treatment of cervical carcinoma
  • Physics-aspects of dose accuracy in high dose rate (HDR) brachytherapy: source dosimetry, treatment planning, equipment performance and in vivo verification techniques
  • An integrated phantom for HDR quality control
  • High dose rate brachytherapy in the treatment of cervical carcinoma
  • Description of an afterloading 192 Ir interstitial-intracavitary technique in the treatment of carcinoma of the vagina
  • Determination of the source dwell position of an afterloading device with a detector array
  • Description of an afterloading 192 Ir interstitial-intracavitary technique in the treatment of carcinoma of the vagina
  • Radiochromic film measurement of anisotropy function for high-dose-rate Ir-192 brachytherapy source
  • Monte Carlo and TLD dosimetry of an 192Ir high dose-rate brachytherapy source