The premise behind functional endoscopic sinus surgery is the reduction of sinus disease through improved ventilation and mucociliary clearance within the paranasal sinuses [1]. The surgical procedure is guided by endoscopy and, therefore, requires a precise understanding of the highly individualized anatomy of this area. CT in the coronal plane provides the closest imaging correlation to the endoscopist�s view and has been used since the introduction of functional endoscopic sinus surgery to guide the surgeon performing this procedure [2]. Nevertheless, since the introduction of this technique, the radiologist�s aim and the otolaryngologist�s wish have been to view this area three-dimensionally. Given the three-dimensional (3D) reconstruction programs available over the past 15 years, an accurate 3D reconstruction of the underlying anatomy has been virtually impossible. The newly available volumetric 3D display made possible by the Virtuoso 3D workstation (Siemens Medical, Iselin, NJ) is, for the first time, able to provide reliable and realistic 3D images in an interactive, realtime display [3, 4]. The objective of this presentation is to show the 3D anatomy of the nasal cavity and paranasal sinuses with the Virtuoso 3D imaging workstation.