2.2.5 Main outcomes measurements
The following measurements were calculated to validate our data and to compare the dimensions of the IAC of a South African population to those measured in literature:
  1. AP diameter at the base of the basal turn of the cochlea (APDB), i.e. the distance between landmarks 1 and 3.
  2. AP diameter at the midpoint of the IAC (APDM), i.e. the distance between landmarks 5 and 6.
  3. Opening diameter of the IAC, i.e. the distance between landmarks 2 and 4.
  4. Anterior length of the IAC, i.e., is the distance between landmarks 1 and 2.
  5. Posterior length of the IAC, i.e. the distance between landmarks 3 and 4.
Landmarks seven to ten were not used to make any measurements but they are important for defining the shape of the IAC for 3D model generation.