Özet:

OBJECTIVE To retrospectively evaluate the absorbed doses of organs at risk, such as lungs and the heart of the patients who underwent radiotherapy (RT) using the voluntary deep inspiration breath-hold (vDIBH) technique, and to compare the results with the literature. METHODS In this study, 102 patients who underwent adjuvant RT for the treatment of breast cancer in our clinic between November 2018 and December 2019 were included. A breast and/or chest wall, and/or lymph node RT of 50 Gy in 25 fractions was planned for all patients, and an additional boost of 10 Gy in five fractions was planned for patients requiring an RT boost. The treatment plans included 3DCRT, Field in Field (FIF), IMRT and VMAT approaches. RESULTS In the group undergoing supraclavicular fossa RT, the mean V20Gy was found to be 24.8%, compared to 16% in the group not undergoing supraclavicular fossa RT (p<0.01). In the group undergoing mammaria interna RT, the mean heart dose was 3.1 Gy, compared to 2.1 Gy in the group not undergoing mammaria interna RT (p=0.04). CONCLUSION Respiratory motion control techniques can reduce uncertainties in the target related to respiratory motion. The irradiated volume doses of the ipsilateral lung, heart reduce.

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