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Sensitivity analysis and selection of registration parameters for GM rigid registration. The box-and-whisker plots show median TRE (red line), interquartile, and range. (a,b) TRE and runtime measured as a function of the number of points (n) in the GM models. (c–f) TRE measured versus the width (σGMRigid) of the isotropic Gaussian for various hierarchical pyramids. Blue arrows mark values selected as nominal.
