비부비동 전산화 단층촬영을 이용한 3차원 영상 재건의 임상적 적용：일측성 만성 상악동염 환자에서의 통기도 평가

Abstract

Background and Objectives：The purposes of this study were to evaluate the aeration of maxillary sinus, using 3-dimensional reconstruction of computed tomography (3DR-CT), to compare the estimated air volume of the normal maxillary sinus with area of natural ostium. Subjects and Method：In 10 patients having unilateral maxillary sinusitis refractory to proper medical therapy, 3-dimensional reconstruction images were obtained based on high-resolution CT by surface-rendering technique on a personal computer. A software (VworksTM 4.0, CyberMed Inc, Korea) was used for 3-dimensional reconstruction. Maxillary ostium on CT was defined to measure the maxillary natural ostium on 3-dimensional reconstruction images. Results：In unila-teral maxillary sinusitis, an air volume of the affected sinus was 4.71± 13.29± 9.76 mL. The area of the afected maxilary ostium on CT was 11.10± 14.40 mm2, and that of the contralateral normal sinus was 24.20± 18.64 mm2. The air volume and area of maxillary ostium on CT of the afected maxillary sinus were reduced significantly, compared with those of the contralateral normal one (p<0.05). But, there was no significant correlation betwen the aeration of maxilary sinus and the degree of decreased area of maxilary ostium on CT (p= 0.285). Conclusion：3DR-CT is the new technique, which enables us to measure the volume of maxillary sinus as well as the area of maxillary ostium. Also, it is helpful in assessing the aeration of maxillary sinus. (Korean J Otolaryngol 2003 ;46 :1035-9)