Hayes C E, Roemer P B
Applied Science Laboratory, GE Medical Systems, Milwaukee, Wisconsin 53201.
Magn Reson Med. 1990 Nov;16(2):181-91. doi: 10.1002/mrm.1910160202.
Multiple images acquired simultaneously from an array of surface coils can be combined to give a composite image with an improved signal-to-noise ratio (SNR) and a large field of view. The composite images' SNR can be optimized by taking advantage of noise correlations between coils and phase shifts induced by surface coil reception. Methods are derived for making optimal composite images with uniform noise or with uniform sensitivity. A simplified model is used to provide an intuitive understanding of the interaction of noise correlation and phase shift phenomena.
从一组表面线圈同时采集的多个图像可以合并，以生成具有改善的信噪比（SNR）和大视野的合成图像。通过利用线圈之间的噪声相关性和表面线圈接收引起的相移，可以优化合成图像的SNR。推导了用于制作具有均匀噪声或均匀灵敏度的最佳合成图像的方法。使用简化模型来直观理解噪声相关性和相移现象的相互作用。
