TY - JOUR
T1 - Examination of formula for enhanced dynamic wedge factors in symmetric and asymmetric fields
AU - Sato, Tomoharu
AU - Tachibana, Nobuhide
AU - Hanada, Takashi
AU - Kitamura, Nozomi
AU - Ootomo, Yuuko
AU - Nakajima, Masaru
AU - Yoshino, Shinichi
AU - Ishikawa, Satoko
AU - Ito, Teruo
AU - Hashimoto, Takeo
AU - Kimura, Masaharu
AU - Yoshioka, Minoru
PY - 2006/12/20
Y1 - 2006/12/20
N2 - 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.
AB - 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.
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U2 - 10.6009/jjrt.62.1690
DO - 10.6009/jjrt.62.1690
M3 - Article
C2 - 17189936
AN - SCOPUS:39049194120
SN - 0369-4305
VL - 62
SP - 1690
EP - 1696
JO - Nippon Hoshasen Gijutsu Gakkai zasshi
JF - Nippon Hoshasen Gijutsu Gakkai zasshi
IS - 12
ER -