Halbach permanent magnet array offers lightweight and mobility but its field is sensitive to temperature, thus hindering its robust point-of-care MRI applications. This work presents a temperature-insensitive Halbach magnet array design for ultra-low-field MRI. The proposed array is of adequate bore diameter and reasonable weight (~50kg), and provides a 30 mT B0 within a 20 cm imaging field of view (FOV). Numerical simulation is conducted to test the proposed design, demonstrating a drastic reduction in temperature-induced B0 drifting and inhomogeneity.
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