Shape Prediction of Nasal Bones by Digital 2D-Photogrammetry of the Nose Based on Convolution and Back-Propagation Neural Network

Table 2

The nasal angles on the skin surface are listed from 1 to 9 and the measurement angles are made on the nasal bone from 10 to 13.

No.	Abbreviation	Name
1	g-n-prn	Nasofrontal angle
2	pg-n-prn	Nasofacial angle
3	g-sn-pg	Facial angle
4	n-prm-sn	Nasomental angle
5	n-prm-cm	Nasal angle
6	cm-sn-ls	Nasolabial angle
7		Middle facial height angle
8		Lower facial height angle
9	n–k–r1	Nasal kyphion rhino
10	NA	Nasion angle
11	DPA	Dorsal profile angle
12	KA	Kyphion angle
13	RA	Rhinion angle

¹k: kyphion. This feature appeared in some cases, affecting the shape and profile of the nose.