Beyond noise power in 3D computed tomography: the local NPS and off-diagonal elements of the Fourier domain covariance matrix
A. R. Pineda, D. J. Tward, A. Gonzalez, and J. H. Siewerdsen, in Medical physics.
MO-D-304A-01: Spatial and Fourier Analysis of Non-Stationarity in 3D X-Ray Computed Tomography
A. Pineda, D. Tward, A. Gonzalez, and J. Siewerdsen, in Medical Physics.