title: [MRI study of parathyroid adenoma. Value of T2-weighted sequences].
abstract: The authors report a series of 22 patients operated for primary hyperparathyroidism. The parathyroid adenoma was located preoperatively by MRI and ultrasonography. Measurement of the relaxation time was performed in vitro at 37 degrees C in a 0.47 Tesla field during the 30 minutes following resection. The relaxation times obtained at a precession frequency of 20 mHz were 0.844 +/- 0.16 sec for T1 and 0.082 +/- 0.025 sec for T2. MRI had a sensitivity of 73% and a specificity of 88% for the localization of the parathyroid adenoma, while ultrasonography had a sensitivity of 73% and a specificity of 98%.
authors.forename: J M
authors.initials: JM
authors.lastname: Brulé
authors.forename: A
authors.initials: A
authors.lastname: Degeorges
authors.forename: Y
authors.initials: Y
authors.lastname: Mauss
authors.forename: J B
authors.initials: JB
authors.lastname: Jost
authors.forename: J J
authors.initials: JJ
authors.lastname: Wenger
authors.forename: Y
authors.initials: Y
authors.lastname: Le Bras
authors.forename: C
authors.initials: C
authors.lastname: Scheiber
authors.forename: J
authors.initials: J
authors.lastname: Marescaux
authors.forename: J
authors.initials: J
authors.lastname: Chambron
mesh_terms: D000236:Adenoma / Q000175:diagnosis* / Q000473:pathology; D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D005260:Female; D006801:Humans; D008279:Magnetic Resonance Imaging / Q000379:methods*; D008297:Male; D008875:Middle Aged; D010282:Parathyroid Neoplasms / Q000175:diagnosis* / Q000473:pathology; D014463:Ultrasonography
vernacular_title: Exploration IRM de l'adénome parathyroïdien. Intérêt des séquences pondérées en T2.