Magnetic resonance imaging of the pituitary adenoma: analysis of the enhancement patterns

-뇌하수체 The magnetic resonance images (MRI) of 30 patients with surgically or biochemically confirmed pituitaη adenomas (20 macroadenomas , 10 microadenomas) were retrospectively evaluated. Ten patients had hyperprolactinemia , another eight had acromegaly , another eight had nonfunctioning adenoma and four had Cushing disease. The examinations were performed at a 1. 5-T superconducting MR system using a multisection spin-echo technique with 3mm-thick sections and a 256 x 224 matrix. Tl weighted sagittal and coronal images were ob tained before and within 30 minutes after the administration of Gd-DTPA (O.lmmoljkg). An떠ysis of the MRI was focused on the signal intensity and enhamcement patterns of the pituitary adenoma before and after Gd DTPA administration. Compared with endocrinologic dia밍losis， macroadenoma showed heterogeneous enhacement in 55% , rim enhancement in 35% and homogeneous enhancement in 10% , Conclusively , the en hancement patterns of the pituitaη adenoma did not correlate with the subtypes made according to hormone production.

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