Single-sided low-field MRI scanners can provide image guidance during interventions such as prostate biopsies without restricting surgical access. However, image reconstruction from these scanners is challenging due to the non-linearity of their gradient fields and inhomogeneous B0 fields. At the same time, non-Cartesian sampling is desirable for these scanners to maximize SNR efficiency and provide self-navigation. In this work, we report a fast iterative 3D Type-III NUFFT reconstruction for a 65 mT single-sided prostate imager, with non-linear single-sided gradient fields and a built-in B0 gradient field. The reconstruction was compared with a model-based reconstruction for a high-bandwidth radial RARE acquisition.
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