001     168307
005     20240229133604.0
024 7 _ |a 10.21873/anticanres.14957
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024 7 _ |a pmid:33813396
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024 7 _ |a 1791-7530
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037 _ _ |a DKFZ-2021-00818
041 _ _ |a English
082 _ _ |a 610
100 1 _ |a Zwicker, Felix
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245 _ _ |a Hypofractionated Radiotherapy With Simultaneous-integrated Boost After Breast-conserving Surgery Compared to Standard Boost-applications Using Helical Tomotherapy With TomoEdge.
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520 _ _ |a This comparative plan study examines a range of boost-radiation methods in adjuvant radiotherapy of breast cancer using helical intensity-modulated radiotherapy with TomoEdge-technique. Impact of hypofractionated radiation with simultaneous-integrated boost (SIB) and influence of differing assumed α/β-values were examined.For 10 patients with left-sided breast cancer each four helical IMRT-plans with TomoEdge-technique were created: hypofractionated+SIB (H-SIB) (42.4/54.4 Gy, 16 fractions), normofractionated+SIB (N-SIB) (50.4/64.4 Gy, 28 fractions), hypofractionated+sequential-boost (H-SB) (42.4 Gy/16 fractions+16 Gy/8 fractions), normofractionated+ sequential-boost (N-SB) (50.4 Gy/28 fractions+16 Gy/8 fractions). Equivalent doses (EQD2) to organs-at-risk (OAR) and irradiated mammary-gland were analysed for different assumed α/β-values.The mean EQD2 to OAR was significantly lower using hypofractionated radiation-techniques. H-SIB and H-SB were not significantly different. H-SIB and N-SIB conformed significantly better to the breast planning-target volume (PTV) and boost-volume (BV) than H-SB and N-SB. Regarding BV, mean EQD2 was significantly higher for all α/β-values investigated when using H-SIB and N-SIB. Regarding PTV, there were no clinically relevant differences.Relating to dosimetry, H-SIB is effective compared to standard-boost-techniques.
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650 _ 7 |a Hypofractionated radiotherapy
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650 _ 7 |a IMRT
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650 _ 7 |a SIB
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650 _ 7 |a TomoEdge
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650 _ 7 |a breast cancer
|2 Other
650 _ 7 |a helical tomotherapy
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650 _ 7 |a simultaneous integrated boost
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700 1 _ |a Hoefel, Sebastian
|b 1
700 1 _ |a Kirchner, Corinna
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700 1 _ |a Huber, Peter E
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700 1 _ |a Debus, Juergen
|0 P:(DE-HGF)0
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700 1 _ |a Schempp, Michael
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773 _ _ |a 10.21873/anticanres.14957
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|t Anticancer research
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