Detailed Investigations into Inward-Outward Ring for Portable MRI

Motivation: Halbach arrays that supplies transversal magnetic fields are widely used in portable magnetic resonance imaging (MRI), while the Inward-Outward ring (IO-ring) array that supplies longitudinal magnetic fields has great unrevealed potential yet remains under studied. Goal(s): We aim to inspect the potential of IO-ring to widen its range of applications in portable MRI. Approach: By identifying the key geometric parameters and examining their effects on field strength and pattern. Analyses were conducted and the potential applications were discussed. Results: IO-ring is shown to be a promising candidate for providing flexible magnetic field patterns for portable MRI in different application scenarios. Impact: The relationship between all design parameters of IO-ring and the corresponding field pattern, as well as some intuitive variants of IO-ring design has been explored, providing new insight to PMA design for portable MRI.