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Fig 2. Individual Mn-MR images show enhancement of tumor after 1 hour. First column shows coronal sections of a single representative MR image of normal pituitary enhancement at baseline and 1 and 11 hours postinjection (small black arrow). Other columns show coronal sections of each individual subject with pituitary adenoma. Adenomas of individual subjects show clear enhancement at 1 hour postinjection (large black arrow, middle row), which continues to increase for 11 hours (large black arrow, bottom row) and allows superior delineation of the tumor/brain border over nonenhanced baseline images.