Optic Canal Location by Computed Tomography

作者:Liu Shuaichen; Chen Yu; Song Junxue; Tian Yong; Xia Changli; Li Youqiong*
来源:Journal of Craniofacial Surgery, 2013, 24(1): 284-286.
DOI:10.1097/SCS.0b013e31827102ee

摘要

The aim of this study was to provide anatomic data for optic canal decompression. One hundred twenty people (55 males and 65 females) were involved in this study anonymously. Twelve parameters are measured in computed tomography: P-1 is the nasal bone tip; P-2 is the middle point of tuberculum sellae; P-3 is the root of columella nasi; P-4 is the cranium end of the optic canal; P-5 is the orbit end of the optic canal; P-1' is P-1's projection on L-2; L-1 is the line that links P-1 and P-2; L-2 goes through P-3 and parallel to L-1; L-3 is the bisector of right and left and goes through P-1. The distance between L-1 and L-2 was 30.47 +/- 3.71 mm. The distance between P-3 and P-1' was 11.66 +/- 2.82 mm. The medial canal wall length was 10.64 +/- 1.10 mm on the right and 10.51 +/- 1.07 mm on the left (P = 0.001). The distance between P-1 and P-4 was 66.74 +/- 5.97 mm. The distance between P-1 and P-5 was 73.04 +/- 6.33 mm on the right and 72.82 +/- 6.33 mm on the left (P = 0.004). The distance between P-5 and L-3 was 6.62 +/- 1.33 mm. The distance between P-4 and L-3 was 12.26 +/- 1.63 mm. The distance between P-3 and P-4 was 75.82 +/- 4.63 mm. The distance between P-3 and P-5 was 82.87 +/- 4.60 mm on the right and 82.25 +/- 4.86 mm on the left (P = 0.003). The angle between P1P4 and L-3 was 12.26 +/- 1.63 degrees. The angle between P1P5 and L-3 was 5.28 +/- 1.13 degrees. The angle between P3P5 and P3P4 was 5.80 +/- 0.97 degrees. These results provide a precise location of the optic canal.