Mugler J P
Department of Radiology, University of Virginia School of Medicine, Charlottesville 22908.
Magn Reson Med. 1991 May;19(1):170-4. doi: 10.1002/mrm.1910190115.
The properties of the image noise for selective averaging of phase-encoding lines have been investigated. For a given acquisition time, selective averaging results in a signal-to-noise ratio penalty compared to averaging all lines equally. In addition, selective averaging yields a non uniform distribution of noise characteristics in spatial frequency space, which can result in a change in the texture of the image noise.
对用于相位编码线选择性平均的图像噪声特性进行了研究。对于给定的采集时间，与对所有线进行同等平均相比，选择性平均会导致信噪比损失。此外，选择性平均在空间频率空间中产生噪声特性的非均匀分布，这可能导致图像噪声纹理的变化。
