[Evaluation of nasal valve by CT imaging].
The nasal valve was studied using coronal scans by computed tomography (CT).


METHODS
Coronal images were 5 mm thick obtained from 133 subjects 93 men and 40 women averaging 46 years of age.


METHODS
The valvular area was studied in 2 slices containing nasal valve, anterior and posterior slices 5 mm apart. After defining standard points for evaluation, breadth, height and area were evaluated using NIH Image Version 1.59 from left and right as an unit.


RESULTS
Results were follows: 1. The breadth of the nasal valvular area is larger in men than in women, and the height greater. The angle of valvular area is similar in both. 2. A comparison of anterior and posterior slices showed the smallest breadth of valvular area in the anterior slice to be smaller than in the posterior slice. The breadth of the vestivular area below the valvular area is larger in the anterior than posterior slice. The angle in the anterior slice is larger than that in the posterior slice. The area of valvular area in the anterior slice is smaller than that in the posterior slice.
Yoshinami
H
H
Department of Otorhinolaryngology, Saitama Medical School, Saitama.
Kase
Y
Y
Iinuma
T
T
D000328:Adult; D000368:Aged; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D009295:Nasal Bone / Q000033:anatomy & histology* / Q000000981:diagnostic imaging; D011856:Radiographic Image Enhancement / Q000379:methods*; D012727:Sex Characteristics; D014057:Tomography, X-Ray Computed / Q000379:methods*