Eligibility criteria {10}
breast cancer
BREAST CANCER
Inclusion — patientsLeft-sided breast cancer patients (invasive and in situ)To be treated in the supine positionAbility to perform a ≥ 20-s breath hold> 18 years oldFemaleAn ECOG score from 0 to 2Able to read and complete questionnaires in EnglishAble to give written informed consent and willingness to participate and comply with the studyExclusion — patientsNo regional lymph nodes involved or at riskNo pregnant/lactating women