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

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

Research output: Contribution to journalArticle

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.

Original languageEnglish
Pages (from-to)1690-1696
Number of pages7
JournalNippon Hoshasen Gijutsu Gakkai zasshi
Volume62
Issue number12
DOIs
Publication statusPublished - 2006 Dec 20
Externally publishedYes

ASJC Scopus subject areas

  • Medicine(all)

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  • Cite this

    Sato, T., Tachibana, N., Hanada, T., Kitamura, N., Ootomo, Y., Nakajima, M., Yoshino, S., Ishikawa, S., Ito, T., Hashimoto, T., Kimura, M., & Yoshioka, M. (2006). Examination of formula for enhanced dynamic wedge factors in symmetric and asymmetric fields. Nippon Hoshasen Gijutsu Gakkai zasshi, 62(12), 1690-1696. https://doi.org/10.6009/jjrt.62.1690