A 51-year-old woman with glioblastoma multiforme. A 51-year-old woman with glioblastoma multiforme. Images were acquired before (A, unenhanced T1 SE) and after (B, T1 SE; C, high-resolution T1 GRE) administration of gadoteridol and before (D, unenhanced T1 SE) and after (E, T1 SE; F, high-resolution T1 GRE) administration of gadobutrol. A rim-enhancing mass in the right thalamus with extension into the posterior interhemispheric region is clearly seen in both examinations. No differences in contrast enhancement or in the size of lesions are apparent. K.R. Maravilla et al. AJNR Am J Neuroradiol 2015;36:14-23 ©2015 by American Society of Neuroradiology