얇은 절편 다절편전산화 단층촬영을 이용한 기관 및 주기관지 게실 평가

Abstract

Purpose To evaluate the characteristics of tracheal and main bronchial diverticula in relation with emphysema.

Materials and Methods A total of 967 CT images were reconstructed with 1.25 mm axial images over 2 months. The incidence, size, number, and location of the tracheal and main bronchial diverticula were analyzed using 3D medical software (Seoul, Korea). The incidence of emphysema and the relationship between emphysema and the size of the diverticula were analyzed.

Results In total, 50 patients (5.1%) showed tracheal diverticula in the right posterolateral wall. In addition, 51 patients (5.2%) showed 89 (9.4%) main bronchial diverticula in the inferior wall, while 68 (72%) showed diverticula in the left posterolateral wall. Tracheal diverticula (6.4 ± 5.0 mm, 1.0 ± 0.2) were larger and fewer than the main bronchial diverticula (2.1 ± 2.0 mm, 1.8 ± 1.6) (p<0.05). Moreover, tracheal diverticula (10.3 ± 7.4 mm) with emphysema in 13 patients (26%), were larger than those without emphysema (5.1 ± 3.0 mm) (p<0.05).

Conclusion On thin-section MDCT, the rates of incidence for tracheal and main bronchial diverticula are about 5%, respectively. Tracheal diverticula in the right posterolateral wall are smaller and fewer than the main bronchial diverticula, which are located primarily in the inferior wall of the left bronchus. Tracheal diverticula with emphysema are larger than those without emphysema.