基于一种改进的相位校正算法消除MRI运动伪影

背景：近年来,MRI由于具有高的空间分辨率和软组织对比度,在临床上的运用越来越广泛。但是其成像时间较长,所以容易受到患者身体运动的影响,产生运动伪影。目的：去除MRI图像成像时产生的伪影,改善图像质量。方法：使用改进的相位矫正算法,并结合水平集算法去除图像伪影。去除伪影后使用模糊增强改善处理后图像的质量。结果与结论：实验证明使用改进的相位矫正算法得到的图像比使用原始的相位矫正算法得到的图像效果更加理想。

MRI motion artifact cancel based on an improved phase correction algorithm

BACKGROUND：At present,magnetic resonance imaging （MRI） has been extensively clinically used due to high spatial resolution and contrast of soft tissue.However,the imaging time is very long,and it is vulnerable to the impact of patient＇s body movement,resulting in motion artifact.OBJECTIVE：To eliminate MRI motion artifact and improve image quality.METHODS：MRI motion artifact was canceled with phase correction algorithm and level set algorithm.Image quality was enhanced after cancelling artifact with fuzzy enhancement algorithm.RESULTS AND CONCLUSION：Results proved that the images obtained by improved phase correction algorithm are better than those by original phase correction algorithm.