[对称和非对称射野中增强动态楔形因子公式的检验]

[Examination of formula for enhanced dynamic wedge factors in symmetric and asymmetric fields].

作者信息

Sato Tomoharu, Tachibana Nobuhide, Hanada Takashi, Kitamura Nozomi, Ootomo Yuuko, Nakajima Masaru, Yoshino Shinichi, Ishikawa Satoko, Ito Teruo, Hashimoto Takeo, Kimura Masaharu, Yoshioka Minoru

机构信息

Department of Radiation Oncology, The Cancer Institute Hospital of Japanese Foundation for Cancer Research.

出版信息

Nihon Hoshasen Gijutsu Gakkai Zasshi. 2006 Dec 20;62(12):1690-6. doi: 10.6009/jjrt.62.1690.

DOI:10.6009/jjrt.62.1690

PMID:17189936

Abstract

We proposed a formula for the enhanced dynamic wedge (EDW) factor in the half-field (HF) that combined the formula proposed by Liu et al. in 1998 and their formula in 2003. When the EDW was used for irradiation to the tangent line of the HF breast, the values calculated by our formula and the measured values were consistent within 0.5%. We showed that our proposed formula was useful, easy to use, and more accurate than the conventional formula. The purpose of this study was to examine the available range of the wedge factor of symmetrical and asymmetric EDW calculated by our formula. As a result of the examination, the values calculated by our formula and the measured values were consistent within 2% except for highly asymmetric EDW. We created a spreadsheet to calculate the wedge factor easily and accurately. We will examine the reason why the calculated and measured values were greater than 2%, and improve our formula so that it can be used in a wider range.

摘要

我们提出了一种半野（HF）中增强动态楔形（EDW）因子的公式，该公式结合了Liu等人在1998年提出的公式及其2003年的公式。当使用EDW对HF乳腺切线进行照射时，我们公式计算的值与测量值在0.5%范围内一致。我们表明，我们提出的公式有用、易于使用且比传统公式更准确。本研究的目的是研究通过我们的公式计算的对称和不对称EDW楔形因子的可用范围。检查结果表明，除高度不对称的EDW外，我们公式计算的值与测量值在2%范围内一致。我们创建了一个电子表格来轻松准确地计算楔形因子。我们将研究计算值和测量值大于2%的原因，并改进我们的公式，以便能在更广泛的范围内使用。