Scholarlink

<p>This study aimed to improve workflow efficiency in absorbed dose-to-water cross-calibration using high-energy electron beams. The AAPM TG-51 and TG-198 protocols emphasise accurate dosimeter calibration, typically involving labour-intensive, two-system measurements. To streamline this process, a statistical method was applied to determine the optimal number of repeated measurements required. Absorbed dose measurements were performed using a 16-MeV electron beam with a Farmer-type ionisation chamber and a parallel-plate chamber. Three series of 10 repeated measurements were analysed using the coefficient of variation, relative error, and probability-based assessments. Results showed that five or more measurements resulted in calibration coefficient variations within acceptable limits and that additional repetitions did not enhance accuracy. This study revealed a method for deriving the appropriate relationship between uncertainty and the minimum number of measurements required for the measuring instruments owned by a facility., with a reduced working time and minimised risk of human error. This approach enables facilities to tailor quality assurance protocols to their specific equipment while maintaining both measurement precision and operational efficiency.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Optimising the number of measurements for absorbed dose-to-water calibration coefficient of ionization chamber by cross-calibration using high-energy electron beams

  • 期刊论文

  • 发表日期：

    2026年5月21日

查看全文
  • Hayato Tsuno,
  • Daiki Maruyama,
  • Koji Sasaki,
  • Fumiyasu Matsubayashi

摘要

This study aimed to improve workflow efficiency in absorbed dose-to-water cross-calibration using high-energy electron beams. The AAPM TG-51 and TG-198 protocols emphasise accurate dosimeter calibration, typically involving labour-intensive, two-system measurements. To streamline this process, a statistical method was applied to determine the optimal number of repeated measurements required. Absorbed dose measurements were performed using a 16-MeV electron beam with a Farmer-type ionisation chamber and a parallel-plate chamber. Three series of 10 repeated measurements were analysed using the coefficient of variation, relative error, and probability-based assessments. Results showed that five or more measurements resulted in calibration coefficient variations within acceptable limits and that additional repetitions did not enhance accuracy. This study revealed a method for deriving the appropriate relationship between uncertainty and the minimum number of measurements required for the measuring instruments owned by a facility., with a reduced working time and minimised risk of human error. This approach enables facilities to tailor quality assurance protocols to their specific equipment while maintaining both measurement precision and operational efficiency.