Glioma patient (a) T1-enhancement with GBCA. At 24 h after ferumoxytol infusion, (b) T1 enhancement, (c) T2*-weighted images. (d) Intraoperative T1-weighted 0.15 T MR 26 h after ferumoxytol injection.3 (Reproduced from Neurosurgery 2007; 60: 601−611; discussion 611−602, with permission of Lippincott, Williams & Wilkins, 2008).