We aimed to determine the perfusion differences according to the histological type, stage, volume and prognoses in the non-small cell carcinoma by thorax perfusion CT.Twenty-four non-small cell carcinoma patients were included in the study. Thorax perfusion CT was done to evaluate the tumors in terms of perfusion parameters: blood flow (BF) and time to peak (TTP) values.The total blood flow of the tumor in squamous cell carcinoma was significantly higher than adenocarcinoma (p=0.031). There was no statistical difference between the perfusion parameters and other parameters.Perfusion CT may help us in evaluating non-small cell carcinomas.