“…Usually, the reference points for angular measurements are located in different CT images, so postprocessing of cross-sectional images is required. CT measurements are performed in a single CT image or images generated by image fusion or overlay in a single superimposed image ( 24 , 63 , 66 , 67 ), using multiplanar reconstruction (MPR) ( 21 , 22 , 40 , 53 ), maximum intensity projection (MIP) ( 21 ), or volume rendering technique (VR) ( 13 , 14 , 17 , 21 , 22 , 25 , 43 , 46 , 47 , 55 – 57 , 59 – 63 ). MPR, MIP, or VR allow free choice of plane, rotation, and perspective, but after the final post-processing, the result is a flat 2D image that lacks the third dimension.…”