ESTRO 2024 - Abstract Book

S482

Clinical - Breast

ESTRO 2024

Conclusion:

We have shown that differences in interpretations of IMN delineation guidelines lead to statistically significant differences in heart doses. For more than 10 % of the patients, the magnitude of the difference in mean heart dose was larger than 0.5 Gy. For the individual patient this magnitude could be large enough to impact treatment decisions, such as referral to proton therapy.

Keywords: delineation guidelines, heart dose, breast cancer

References:

[1] Offersen BV, Boersma LJ, Kirkove C, Hol S, Aznar MC, Biete Sola A, et al. ESTRO consensus guideline on target volume delineation for elective radiation therapy of early stage breast cancer. Radiother Oncol 2015;114:3 – 10. https://doi.org/10.1016/j.radonc.2014.11.030.

[2] Isensee F, Jaeger PF, Kohl SAA, Petersen J, Maier-Hein KH. nnU-Net: a self-configuring method for deep learning based biomedical image segmentation. Nat Methods 2021;18:203 – 11. https://doi.org/10.1038/s41592-020-01008-z.

[3] Nielsen MH, Berg M, Pedersen AN, Andersen K, Glavicic V, Jakobsen EH, et al. Delineation of target volumes and organs at risk in adjuvant radiotherapy of early breast cancer: national guidelines and contouring atlas by the Danish Breast Cancer Cooperative Group. Acta Oncol 2013;52:703 – 10. https://doi.org/10.3109/0284186X.2013.765064.

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