EP-2245: Precision IORT – Dosimetric and geometric evaluation of 10 Kypho-IORTs

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ResultsIn this experiment, the variation of TLD measurements presented within 3% of standard deviation.Percentage of dose different between TG-43 and TLD measurements were found in the range of 7.58% to -21.21%, and -1.26% to 6.61% for Acuros TM BV.In homogeneous medium, dose calculation algorithm based-on TG-43 and Acuros TM BV presented the accurate dosimetric results with the dose different less than 4% when compared to the TLD.However, measuring point in the heterogeneous as behind the cortical bone showed the maximum dose different at -21.21% in TG-43, and was decreased to be 6.61% with Acuros TM BV.About the gamma evaluation with criteria of 3% dose difference and 3mm DTA as well as 10% threshold, the data showed the gamma passing rate at 97.3% for TG-43, and 98.3% for Acuros TM BV when compared to film measurement.Conclusion This investigation showed the accurate dosimetric results from both of TPS dose calculation algorithms in homogeneous region.However, heterogeneity correction algorithm as Varian Acuros TM BV showed significantly improve the accuracy of TPS dose calculation in heterogeneous medium when compared with the measurement.

Ce résumé expose les affirmations des auteurs. BNTIC ne l’interprète pas comme une validation indépendante des résultats.