Fig. 1

How to use the tumor to cerebellar peduncle T2-weighted imaging intensity (TCTI) ratio. A Region of interest (ROI) in tumor on T2 sequence. B ROI in middle cerebellar peduncle on T2 sequence. Calculating the TCTI ratio. TCTI ratio intensity value for ROI within tumor (A)/Intensity value for ROI within middle cerebellar peduncle (B) [11]