The purpose of this study is to obtain resolution, sharpness, coefficient of variation, and CNR from MTF, RMS, and CNR images of a flat panel detector attached to the simulator. In the experiment, MTF, RMS, and CNR images were acquired under the conditions of RQA5 quality of the X-ray beam of the simulator. After inputting the acquired images into the Octave Software program, resolution, sharpness, coefficient of variation and CNR were obtained. As a result, the obtained resolution and sharpness were 3.29 lp/mm and 1.36 lp/mm. The coefficient of variation was obtained as 0.021. And the CNR was calculated as 15.227. In conclusion, it is thought that the quality evaluation data for the images obtained from the flat panel detector of the simulator will be used as useful data for image quality evaluation research conducted by research institutions as well as medical institutions.