Keywords: Low-Field MRI, Low-Field MRI
Motivation: Single-sided MRI offers flexibility for the movements of the field-of-view (FoV) with respect to the magnet. This adds a degree-of-freedom for signal encoding especially when the gradients are non-linear.
Goal(s): We aim to optimize the trajectory of the FoV within a non-linear magnet field, generated by a single-sided magnet array for good signal encoding.
Approach: Genetic algorithm was used for the optimization. The fitness function includes the filling area of local k-spaces, an indicator of the encoding capability of non-linear gradient field.
Results: The optimized trajectories result in improved signal encoding and thus improved image quality.
Impact: This work provides an additional degree of freedom to encode signals using single-sided magnet/arrays besides the gradients of field patterns, to improve image quality. It extends the possibility to use a moving single-sided magnet/arrays for imaging.
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