title: Paranasal sinuses and nasopharynx CT and MRI.
abstract: Neoplastic disease of the nose, paranasal sinuses, the nasopharynx and the parapharyngeal space requires thorough assessment of location and extent in order to plan appropriate treatment. CT allows the deep soft tissue planes to be evaluated and provides a complement to the physical examination. It is especially helpful in regions involving thin bony structures (paranasal sinuses, orbita); here CT performs better than MRI. MRI possesses many advantages over other imaging modalities caused by its excellent tissue contrast. In evaluating regions involving predominantly soft tissue structures (ec nasopharynx and parapharyngeal space) MRI is superior to CT. The possibility to obtain strictly consecutive volume data sets with spiral CT or 3D MRI offer excellent perspectives to visualize the data via 2D or 3D postprocessing. Because head and neck tumors reside in a complex area, having a 3D model of the anatomical features may assist in the delineation of pathology. Data sets may be transferred directly into computer systems and thus be used in computer assisted surgery.
authors.affiliation: Radiology Associates Dortmund, Brüderweg 13, 44135, Dortmund, Germany.
authors.forename: K W
authors.initials: KW
authors.lastname: Sievers
authors.forename: H
authors.initials: H
authors.lastname: Greess
authors.forename: U
authors.initials: U
authors.lastname: Baum
authors.forename: M
authors.initials: M
authors.lastname: Dobritz
authors.forename: M
authors.initials: M
authors.lastname: Lenz
mesh_terms: D018322:Angiofibroma / Q000000981:diagnostic imaging; D001922:Brain Abscess / Q000000981:diagnostic imaging; D002294:Carcinoma, Squamous Cell / Q000000981:diagnostic imaging; D003287:Contrast Media; D019786:Gadolinium DTPA; D005925:Glomus Jugulare Tumor / Q000175:diagnosis; D006801:Humans; D008202:Lymphangioma / Q000175:diagnosis; D008228:Lymphoma, Non-Hodgkin / Q000000981:diagnostic imaging; D008279:Magnetic Resonance Imaging / Q000379:methods*; D008444:Maxillary Sinus Neoplasms / Q000000981:diagnostic imaging; D009078:Mucocele / Q000175:diagnosis / Q000000981:diagnostic imaging; D009303:Nasopharyngeal Neoplasms / Q000175:diagnosis* / Q000000981:diagnostic imaging; D009361:Neoplasm Invasiveness; D010255:Paranasal Sinus Neoplasms / Q000175:diagnosis* / Q000000981:diagnostic imaging; D012852:Sinusitis / Q000000981:diagnostic imaging; D014057:Tomography, X-Ray Computed / Q000379:methods*
chemical_list: D003287:Contrast Media; D019786:Gadolinium DTPA