Imaging Study by Sagittal Reconstruction of Paranasal Computed Tomography / 대한이비인후과학회지

ABSTRACT

BACKGROUND: It is very difficult to evaluate the anatomy of several tiny structures of paranasal sinus(PNS), especially frontal recess area. Until now, plain X-ray, coronal and axial computed tomogram(CT) and MRI have been used as the radiologic study of PNS. However, there is a lack of full understanding with these 2 dimensional images. Routine coronal and axial CT helps us understand the structure of PNS approximately. But they have limitations in understanding the A-P directional anatomy and difficulties especially in establishing the 3 dimensional concept with frontal recess, which has the various structure as the degree of developing of agger nasi and surrounding structure of frontal recess. OBJECTIVES: We studied to resolve these difficulties and limitations in understanding the A-P directional anatomy and 3 dimensional concept of complicated structures of PNS. MATERIALS AND METHODS: We checked PNS CT in 20 patients who have been suspected to have paranasal problems, and we reconstructed each CT scan into axial and sagittal images from the thin cutted axial PNS CT by using 3 dimensional reconstruction software, SIENET magic view 1,000. RESULTS: With comparing each reconstructed images this problem, we got clear understanding of the structures of A-P direction of nasal cavity and PNS, especially frontal recess area. CONCLUSION: Three dimensional reconstructed views provides clear images in complicated anatomy of nose and paranasal sinus, so it is considered to helpful in planning of surgery.