ESTRO 2025 - Abstract Book

S446

Clinical - Breast

ESTRO 2025

Conclusion: Contrary to initial expectations, heart - breast distance was larger during T-DIBH than A-DIBH. Despite the difference being small, individual benefit may vary. Dosimetric radiotherapy planning is necessary to compare the DIBH techniques in terms of MHD.

Keywords: Deep Inspiration Breath-Hold, Prone, Radiotherapy

References: Mulliez, Thomas et al. Deep inspiration breath-hold in the prone position retracts the heart from the breast and internal mammary lymph node region. Radiother Oncol 2015;117. doi: 10.1016/j.radonc.2015.09.030.

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Proffered Paper FAST-Forward nodal substudy: 5-year normal tissue effects following 1-week versus 3-week axillary radiotherapy for breast cancer (ISRCTN19906132) Adrian M Brunt 1,2 , Duncan Wheatley 3 , Jaymini Patel 4 , Fay H Cafferty 4 , Mark Sydenham 4 , Abdulla Alhasso 5 , Charlie Chan 6 , Susan Cleator 7 , Charlotte E Coles 8 , Helen Fleming 9 , Daljit Gahir 2 , Andy Goodman 10 , Joanne S Haviland 4 , Anna Kirby 11 , Cliona Kirwan 12 , Zohal Nabi 13 , Elinor Sawyer 14 , Judith Sinclair 15 , Navita Somaiah 11 , Isabel Syndikus 16 , Karen Venables 17 , John Yarnold 11 , Judith M Bliss 4