Abstract #3717

Real-Time Z-Shimming for Magnetic Resonance Imaging of the Spinal Cord

Eva Alonso-Ortiz¹, Cyril Tous^2,3, Ryan Topfer¹, and Julien Cohen-Adad^1,4

¹NeuroPoly Lab, Ecole Polytechnique, Montreal, QC, Canada, ²Department of Radiology, Radiation-Oncology and Nuclear Medicine and Institute of Biomedical Engineering, Université de Montréal, Montreal, QC, Canada, ³Laboratory of Clinical Image Processing Le Centre de Recherche du CHUM, Centre hospitalier de l'Université de Montréal, Montreal, QC, Canada, ⁴Functional Neuroimaging Unit, Centre de recherche de l'Institut universitaire de gériatrie de Montréal, Montreal, QC, Canada

Spinal cord MRI is notoriously challenging, in part due to the fact the spinal cord is near the lungs, causing magnetic field inhomogeneities that are changing throughout respiration. We propose a novel solution, called real-time z-shimming to address this problem. Real-time z-shimming involves compensating for magnetic field inhomogeneities that arise during image acquisition, by adapting the sequence in real-time. Our findings show that real-time z-shimming can recover signal loss, caused by respiration-induced magnetic field inhomogeneities, in the spinal cord region.

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