Ferumoxytol-enhanced vascular suppression in magnetic resonance neurography

Objective To evaluate ferumoxytol-enhanced vascular suppression for visualizing branch nerves of the brachial plexus in magnetic resonance (MR) neurography. Materials and methods Signal simulations were performed to determine ferumoxytol’s effect on nerve-, fat-, and blood-to-muscle contrast and to optimize pulse sequence parameters. Prospective, in vivo assessment included 10 subjects with chronic anemia who underwent a total of 19 (9 bilateral) pre- and post-infusion brachial plexus exams using three-dimensional (3D), T 2 -weighted short-tau inversion recovery (T 2 -STIR) sequences at 3.0 T. Two musculoskeletal radiologists qualitatively rated sequences for the degree of vascular suppression and brachial plexus branch nerve conspicuity. Nerve-to-muscle, -fat, and -vessel contrast ratios were measured. Results Quantitative nerve/muscle and nerve/small vessel contrast ratios (CRs) increased with ferumoxytol ( p