基于平稳小波变换的减小MR图像截断伪影的方法

A method using stationary wavelet transform for reduction of truncation artifacts in MR imaging

如何缩短磁共振成像的时间一直是磁共振成像领域研究的热点问题之一。在实际工作中只采集部分相位编码的磁共振信号进行磁共振图像重建,不但可以缩短成像的时间,而且可以使图像保持较高的信噪比,但在重建的图像上出现了截断伪影。采用平稳小波变换和图像模板技术消除图像截断伪影及噪声,可有效地提高图像质量。

How to to minimize the duration of magnetic resonance imaging is one of the most important task in the field of magnetic resonance imaging. In practice,a limited number of the phase-coded signals are often acquired in order to minimize the duration of the studies and maintain adequate signal-to-noise ratio.However, this results in truncation artifacts in magnetic resonance imaging. Stationary wavelet transform and the mask of image were used to reduce truncation artifacts, and the experimental results indicate that the proposed method is efficient and reliable.