Magnetic Susceptibility and Field Map Estimation in fMRI Time Series Using a High Resolution Static Field Map

Keywords

accurate acquisition advantageous affected anatomy apply applying arbor assume assumed assuming assumption axis become binary body capable channel chose coil column complex computation compute computed computing concepts constant convolution coordinate denote density dependent derived descent described distorted distortion distortions dual dynamic dynamically easy effective eliminates equal error estimation estimator field filter filters finding function functional future geometric giving head highly homogeneous human include index induced induces inhomogeneity initial initialize introduced introducing issues iteratively kernel known likelihood literature local magnitude making maps marques measured meeting model mostly motion necessary necessitates noise noisy object orientation part phantom physics piecewise position practice previous provability radiology real reconstruction refines regardless regularization regularizations removed represents residuals resolution respectively retrospectively ridden rigid rotations samples scanner segmentation sensitivity separated series sets simple since smooth space static stays steepest structure subject sufficient susceptibility taken task term terms tissue transformations treating uniform unwrapping variance variations varies water wrapping yield zero