The rate of breast cancer has increased in recent years and represents the most frequent tumor disease for women. However, due to the currently available therapeutic possibilities, breast cancer can be treated well. Radiation therapy is an important factor in the treatment of this malignant disease. The radiation exposure of the lungs and the heart in the irradiation of the left mamma is still undesirable. Breathing has a negative effect on the extent of radiation exposure. In order to minimize the dose of these organs in irradiation, breathing methods are used. The aim of the work is to find out whether there are respiratory methods for the reduction of dose of the risk glands when the left breast is irradiated, and whether these methods can minimize the dose. A comprehensive search of literature available within online databases and relevant books of the General Hospital of Vienna as well as the University of Applied Sciences Campus Vienna provide an answer to the defined research questions. The work also provides an overview of the various systems that are used to assist in respiratory-controlled radiation therapy. The most commonly used breathing system is the Deep Inspiration Breath Hold (DIBH), which minimizes the dose of the risk-free-breathing (FB). In literature, Catalyst, ABC (Active Breathing Coordinator) and RPM (Real Positioning Management) are the most common systems for respiratory control. In the selected studies, a reduction in the dose of the left lung as well as of the heart was achieved with the aid of DIBH.