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- W2009402764 abstract "We report a dosimetric variation caused by a user-defined variable for the Leksell Gamma Knife planning system. Treatment plans of 31 randomly selected patients were studied retrospectively to determine the dosimetric effects in the dose prescription and computation as a result of dose matrix positioning in the Leksell Gamma Plan (LGP, Version 4.12). Phantom studies with ion chamber measurements were carried out to validate the accuracy of the computation results. An average overdose of 2% was found due to the variations in the user-defined dose matrix position for the studied cases. In the extreme, the overdose value was as high as 5% with an over-treatment time exceeding 2 min. The phantom measurements were found to agree with the LGP calculation within 0.5%. An adaptive method was developed and demonstrated in this study to eliminate such dosimetry variations." @default.
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- W2009402764 date "2000-04-07" @default.
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- W2009402764 title "The effect of user-defined variables on dosimetry consistency in Gamma Knife planning" @default.
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- W2009402764 doi "https://doi.org/10.1088/0031-9155/45/5/402" @default.
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