Akciğer Kanseri SBRT Uygulamalarının RTOG 0915 Protokolüne Uygun Doz Sınırlamalarına Göre Oluşturulan 3B Konformal Ark ve VMAT SBRT Planlarının Karşılaştırılması

In this study, 20 non-small cell lung cancer patients were treated according to the accepted physical criteria of the latest lung SBRT protocol RTOG 0915. VMAT, 3D conformal arc techniques with 6 MV FF and FFF energy modalities were used for treatment planning. VMAT technique has statistical significance and has shown better high dose and intermediate spillage region according to RTOG 0915 definitions; ratio of prescription isodose volume to the PTV volume (Conformity index CI), ratio of 50% prescription isodose volume to the PTV (intermediate spillage volume ISV), maximum dose in % of dose prescribed at 2 cm from PTV (intermediate dose spillage location ISL) compared to 3DCA. Investigation of FFF and FF energy modalities demonstrate that FFF plans have advantages in RTOG 0915 criteria over FF plans. Results of all the plans point to VMAT-FFF as the optimal technique for lung SBRT treatments due to the high quality SBRT plans obtained.