Optimizing Contrast-enhanced Magnetic Resonance Neurography of the Brachial Plexus by Delayed Scanning

Motivation: While previous studies have confirmed the ability of contrast agents to improve the visualization of brachial plexus, there is limited research on the optimal timing for ceMRN to achieve the best image quality. Goal(s): To determine the optimal scanning time point for brachial plexus ceMRN by multi-phase scanning scheme. Approach: After injecting the contrast agent, the "3D T2-NerveView" sequence with a scanning time of 5 minutes was immediately performed for six phases. Results: The recommended scanning time point for ceMRN is 5 min after contrast injection, at which the brachial plexus can be displayed best and the interference of background signals is minimal. Impact: Help obtain better brachial plexus ceMRN images. May promote new scanning protocols for improving ceMRN image quality.