Figure 2.

z-Evans index, brain per ventricle ratios (BVRs) at the anterior commissure (AC) and posterior commissure (PC) levels, and callosal angle. The z-Evans index is measured as the maximum z-axial length of the frontal horns of the lateral ventricles (sky blue line) to the maximum cranial z-axial length at the midline (yellow line) on the coronal plane (left upper) just on the AC (right upper). The BVRs at the AC and PC levels are measured as the maximum z-axial length of the brain just above the lateral ventricles (green line) divided by the maximum length of the lateral ventricles (sky blue line). The callosal angle is measured as the roof of the bilateral ventricles on the coronal plane (left lower) just on the PC (right lower). In this case same as Figure 1, the z-Evans index, BVRs at the AC and PC levels, and callosal angle were calculated as 0.43, 0.75, 0.87, and 72°, respectively.