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Table 2 Definitions of 15 analyzed 3D distances and 6 angles

From: The possibilities of a portable low-budget three-dimensional stereophotogrammetry system in neonates: a prospective growth analysis and analysis of accuracy

  Abbreviation Explanation
3D distances n-sn nasal height
en r -en l intercanthal distance
(ex-en) r / l eye width right / left
sbal r -sbal l subalar width
sn-nt nasal depth
(en-sbal) r / l lateral height of the nose right / left
c’-sn length of the columella
sn-ls lengt of the upper lip
ch r -ch l oral width
(en-ch) r / l lateral height of the midface right / left
(nost_post - nost_ant) r / l length of the nostril right / left
(nost_lat - nost_med) r / l width of the nostril right / left
3D angles n - nt - sn nasal tip angle
ls - sn - nt subnasal angle
ls - sn - c’ approximated nasolabial angle
sbal r - nt - sbal l anterior angle of the nasal base triangle defined by the mentioned points
sbal r - sn - sbal l anterior angle of the nasal base triangle defined by the mentioned points
en r - n - en l anterior angle of the nasal root triangle defined by the mentioned points