Fig. 2

The examples of post-contrast MRI images and T1-WI histograms obtained from different grades of meningioma tumors in one slice of brain. A T1-WI image with grade I (contoured with orange line). B T1-WI image with grade II (contoured with orange line). C T1-WI image with grade III (contoured with blue line). D A volumetric intensity histogram of grade I. E A volumetric intensity histogram of grade II. F A volumetric intensity histogram of grade III