[MRI study of parathyroid adenoma. Value of T2-weighted sequences].
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%.
Brulé
J M
JM
Degeorges
A
A
Mauss
Y
Y
Jost
J B
JB
Wenger
J J
JJ
Le Bras
Y
Y
Scheiber
C
C
Marescaux
J
J
Chambron
J
J
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
Exploration IRM de l'adénome parathyroïdien. Intérêt des séquences pondérées en T2.