Treatment Planning
tumor
TUMOR
Treatment plans were created on DIBH CTs. The FB and DIBH CTs are fused based on the left breast. The doses of the heart, left anterior descending coronary artery (LADCA), and left lung in FB and DIBH were evaluated according to the DIBH treatment plans for dosimetric comparison. Tangential-based field-in-field simplified intensity-modulated RT was used for these patients. The prescribed dose is 43.5 Gy in 15 daily fractions to the whole breast and 49.5 Gy in 15 daily fractions to the tumor bed if indicated. The DIBH technique was used for all treatments.