Novel eradicative high-dose rate brachytherapy for internal mammary lymph node metastasis from breast cancer

Figure 1 X-ray computed tomography images before radiotherapy and external beam radiotherapy treatment plan. A: A lesion typical of internal mammary lymph node metastasis is observed, with no skin involvement; B: External beam therapy plan on the same slice. Subdermal dose at depth of 5 mm, epidermal dose, and dermal dose at depth of 2.5 mm was 57.1 Gy, 40 Gy and 48 Gy EQD_{2, α/β = 3}, respectively, and 8-9.3 Gy (17.6-22.9 Gy-EQD_{2, α/β = 3}). Isodose curves are 98% and 90% to 10% at intervals of 10% of 60 Gy, from innermost to outermost. White arrows: Positional markers for external beam radiotherapy simulation.