OBJECTIVE To determine the relation of maxillary sinus retention cysts (RCs) to ostiomeatal complex (OMC) obstruction and anatomic variation of the paranasal sinuses. METHODS The results of 410 computed tomographic scans of the sinuses ordered by otolaryngologists in an academic center during a 1-year period were reviewed. Computed tomographic scans with maxillary sinus RCs were studied to de...

Modern machinery, such as automobiles, trains and aircraft, are equipped with embedded distributed computer control systems where the software implemented functionality is steadily increasing. The development of such systems, however, is still a relatively new and young discipline. There is consequently a lack of tools, methods and models to support, in particular, the early architectural desig...