Fig 3.

A, Scout topography of OML-based brain CT. B, Brain CT images based on the OML showing only the posterior commissure (black arrow) without inclusion of anterior commissure at the level similar to D. C, Scout topography of TS-OP line-based brain CT showing the scanning reference lines parallel to the line connecting the tuberculum sellae and external occipital protuberance. D, Brain CT image based on the TS-OP line showing both the anterior commissure (white arrow) and posterior commissure (black arrow) at the same level B.