Non-Cartesian Reconstruction, Pauly, 2005, Analytical Resolution and Noise Characteristics of Linearly Reconstructed Magnetic Resonance Data with Arbitrary k-SpaceSampling 1. 核心问题:为什么需要密度补偿? 在非笛卡尔(non-Cartesian)MRI中,如螺旋(Spiral)
在看文章Analytical Resolution and Noise Characteristics of Linearly Reconstructed Magnetic Resonance Data with Arbitrary k-Space Sampling的时候,我不是很明白方程27,为什么低通滤波之后噪声的方差改变了。原来