Sch. of Electr. Eng., Sydney Univ., NSW.
IEEE Trans Med Imaging. 1991;10(1):40-6. doi: 10.1109/42.75609.
An algorithm that suppresses translational motion artifacts in magnetic resonance imaging (MRI) by using post processing on a standard spin-warp image is presented. It is shown that translational motion causes an additional phase factor in the detected signal and that this phase error can be removed using an iterative algorithm of generalized projections. The method has been tested using computer simulations and it successfully removed most of the artifact. The algorithm converges even in the presence of severe noise.
本文提出了一种利用标准自旋回波图像进行后处理来抑制磁共振成像（MRI）中平移运动伪影的算法。结果表明，平移运动会在检测到的信号中产生附加的相位因子，并且可以使用广义投影的迭代算法来消除该相位误差。该方法已通过计算机模拟进行了测试，并且成功地去除了大部分伪影。即使存在严重的噪声，该算法也能收敛。
