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- ItemLocal estimation of the noise level in MRI using structural adaptation(Berlin : Weierstraß-Institut für Angewandte Analysis und Stochastik, 2014) Tabelow, Karsten; Voss, Henning U.; Polzehl, JörgWe present a method for local estimation of the signal-dependent noise level in magnetic resonance images. The procedure uses a multi-scale approach to adaptively infer on local neighborhoods with similar data distribution. It exploits a maximum-likelihood estimator for the local noise level. The validity of the method was evaluated on repeated diffusion data of a phantom and simulated data using T1-data corrupted with artificial noise. Simulation results are compared with a recently proposed estimate. The method was applied to a high-resolution diffusion dataset to obtain improved diffusion model estimation results and to demonstrate its usefulness in methods for enhancing diffusion data.