Deep inspiration breath-hold (DIBH) is a simple radiotherapy technique, which could have a dramatic impact on the risk of late effects in children. In DIBH, the radiotherapy is delivered while the patient holds his/her breath (4-6 sequential breath-holds). The anatomy is changed and imaging artifacts from respiratory movement are diminished. DIBH is widely used in adult patients with breast cancer and mediastinal lymphoma to minimize the risk of radiation-induced late effects due to a reduced dose to the healthy organs. Also, the technique is simple and cost-efficient.