Investigation of Change in Tumor Volume in Head and Neck Cancers

25 patients diagnosed with head and neck cancer in the radiation oncology clinic of Sisli Etfal Training Research Hospital were included study. Major anatomic changes due to weight loss tumor shrinkage are observed during radiotherapy treatment most cancer. The aim study is examine dose distribution patient anatomy process compare adaptive technique non-adaptive technique. When plans made using plan technique, ipsilateral parotid volume ranged from 15.00±8.57 cc 10.10±5.85 (p=0.046), contralateral 12.21±7.34 7.50±3.55 (p=0.002). ), Ptv 54 759.8±285.9 432.4±126 (p=0.035), 60 338.7±18.9 185.5±58.5 (p=0.003) total body 6380± A statistically significant decrease was T-test Wilcoxan test, decreasing 1600 5230±1570 (p=0.001). While decreased at least 15% maximum 46.3%, 16.6% 46.9%. results obtained histogram (DVH) superior without Adaptive gives a more effective target protecting healthy tissues rate.