The gradient magnetic field is a core component of magnetic resonance imaging (MRI) systems, and its uniformity is directly related to spatial resolution, signal-to-noise ratio, and lesion detection accuracy, making it a key factor constraining imaging quality. At present, the gradient magnetic field in clinical and research MRI systems is susceptible to disturbances arising from coil design, electromagnetic interference, and mechanical deformation, and its uniformity often fails to meet the requirements of high-precision imaging. To address this issue, this paper systematically reviews the evaluation indices and influencing mechanisms of gradient magnetic field uniformity, and proposes targeted optimization strategies from four dimensions: coil structure design, electromagnetic compatibility, mechanical stability, and post-processing calibration and compensation, including novel coil design approaches.
Sun Liang-Gang (Wed,) studied this question.