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- W2015093697 abstract "We set out to investigate IMRT-based concomitant boost. Eight patients with stage III/IV squamous cell carcinoma of the head and neck treated with once daily with chemoradiotherapy at the Dana-Farber/Brigham and Women's Hospital had their treatment plans reviewed with IRB approval. Each case was replanned for treatment with a a concomitant boost regimen. Plans delivered 1.9 Gy in 30 fractions to 57 Gy with a boost of 1.5 Gy in 10 fractions for a total dose of 72 Gy. The boost was planned with both IMRT and 3-D conformal, to compare the two techniques. For each patient, both plans (IMRT-IMRT and IMRT-3DCRT) were evaluated for target and avoidance coverage, monitor units and integral dose. Finally, we evaluated the plans for time to completion. The IMRT-IMRT and IMRT-3-DCRT techniques were equivalent for target coverage. 100% coverage of the GTV and PTV was achieved with 97% of the prescription dose. Hot spots were seen 104% to 108% with IMRT-IMRT plan and from 102–111% with the IMRT-3DCRT plans. The IMRT-IMRT boost had double the monitor units as the 3-DCRT boosts. When the total monitor units from both the initial and boost portions of the plans were e combined there was not a significant differnce. There was a slight increase in integral dose with the IMRT-IMRT plans of mean 3.8%. Planning time was increased for the 3-DCRT boost as opposed to the IMRT boost (mean 3.5 hours vs. 1.5 hours). More time was needed for quality assurance of the IMRT-IMRT plans (3.0 hours vs. 1.5 hours for IMRT-3-DCRT). We found that both IMRT-based concomitant-boost strategies are achievable and produce good dosimetric results." @default.
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- W2015093697 date "2008-12-01" @default.
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- W2015093697 title "Options for Combining Altered Fractionation with IMRT" @default.
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- W2015093697 doi "https://doi.org/10.1177/153303460800700607" @default.
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