title: Evaluation of residual acoustic schwannoma using gadolinium-DTPA enhanced magnetic resonance imaging with the fat suppression technique.
abstract: After subtotal resection of acoustic schwannomas, radiographic evaluation is necessary to evaluate tumor growth. With conventional gadolinium-DTPA T1-weighted magnetic resonance imaging, tumor delineation is often obscured by surgically placed fat. This occurs because fat has the same intensity as enhanced acoustic tumor. T1-weighted magnetic resonance fat suppression techniques can be used to eliminate the strong signal of fat tissue. When this technique is used in combination with gadolinium-DTPA, the definition of pathologic structures is improved in those areas containing large amounts of fat. Twelve patients who had subtotal resection of an acoustic schwannoma underwent gadolinium-DTPA enhanced magnetic resonance imaging using the fat suppression technique. Residual tumors were more conspicuous and had improved margin definition using the fat suppression technique compared to conventional gadolinium-DTPA T1-weighted images. These refinements in magnetic resonance imaging represent a significant advance in the assessment of residual acoustic tumors.
authors.affiliation: Department of Otolaryngology and Bronchoesophagology, Rush-Presbyterian-St. Luke's Medical Center, Chicago, IL 60612-3833, USA.
authors.forename: R A
authors.initials: RA
authors.lastname: Battista
authors.forename: D I
authors.initials: DI
authors.lastname: Bojrab
authors.forename: A M
authors.initials: AM
authors.lastname: Wang
mesh_terms: D000328:Adult; D000368:Aged; D003287:Contrast Media; D005260:Female; D019786:Gadolinium DTPA; D006801:Humans; D008279:Magnetic Resonance Imaging / Q000295:instrumentation / Q000379:methods*; D008297:Male; D008875:Middle Aged; D018365:Neoplasm, Residual / Q000175:diagnosis*; D009464:Neuroma, Acoustic / Q000601:surgery*; D009942:Organometallic Compounds; D004369:Pentetic Acid / Q000031:analogs & derivatives; D012680:Sensitivity and Specificity
chemical_list: D003287:Contrast Media; D009942:Organometallic Compounds; D004369:Pentetic Acid; D019786:Gadolinium DTPA