基于xy非线性梯度场磁共振成像研究

MRI Imaging Technology Based on xy Nonlinear Gradient

为解决非线性梯度成像中心分辨率低的问题,提出了一种基于xy非线性梯度场的成像方法,并讨论了非线性梯度场中心分布曲线对磁共振图像的影响.研究结果表明,在半径r=1.5时,圆形中心分布曲线的图像重建结果最优;与O-Space技术对比实验表明,xy非线性梯度场在不同加速因子R下都得到了更好的重建结果.

To eliminate center blurring existing in nonlinear gradient technology based on xy nonlinear gradient field was proposed, and displacement curve in magnetic resonance imaging （MRI） was discussed. circle center displacement curve with diameter r= 1.5 achieves the best comparison experiment with O-Space under different acceleration factor R, field achieves a better image result. imaging, an imagmg the effect of center The results reveal that reconstruction, and in xy nonlinear magnetic