Higgins C B
Department of Radiology, University of California, School of Medicine, San Francisco.
Radiol Clin North Am. 1993 Sep;31(5):1017-28.
Magnetic resonance imaging is indicated for the localization of the abnormal gland or glands in patients with recurrent or persistent hyperparathyroidism. The accuracy of MRI is equivalent or superior to thallium subtraction scans and high-resolution ultrasonography for identifying the abnormal glands in the neck and superior to other noninvasive imaging techniques for recognizing ectopic glands in the thorax. Most glands have low to medium intensity on T1-weighted images and high intensity on T2-weighted images; however, glands with unusual signal intensity characteristics occur infrequently. Abnormal glands have shown considerable enhancement on T1-weighted images after use of gadolinium DTPA. Some pitfalls in the identification of abnormal parathyroid glands are now recognized.
对于复发性或持续性甲状旁腺功能亢进患者，磁共振成像用于定位异常甲状旁腺。在识别颈部异常甲状旁腺方面，磁共振成像的准确性等同于或优于铊减影扫描和高分辨率超声检查，而在识别胸部异位甲状旁腺方面则优于其他非侵入性成像技术。大多数甲状旁腺在T1加权图像上呈低至中等强度，在T2加权图像上呈高强度；然而，具有异常信号强度特征的甲状旁腺很少见。使用钆喷酸葡胺后，异常甲状旁腺在T1加权图像上显示出明显强化。目前已认识到在识别异常甲状旁腺时存在一些陷阱。
