Mean and SD of the angle acquired from the reference lines of the 223 midsagittal brain MR images vs the ACPC line*

Reference LinesAngle Difference to the ACPC LineSD
TS-EOP line0.0°±4.0°
TS-IOP line0.8°±3.2°
  • Note:—ACPC indicates anterior/posterior commissure; TS-EOP, tuberculum sellae and external occipital protuberance; TS-IOP, tuberculum sellae and internal occipital protuberance; OML, orbitomeatal line.

  • * P value: .236 (TS-EOP line vs TS-IOP line), 0 (TS-EOP line vs OML and TS-IOP line vs OML)