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Recently there has been increasing interest in estimating the distribution of relaxation times contributing to a magnetic resonance signal. This paper shows that it is impractical to estimate the spread of such a distribution from typical measurements. Instead, a Bayesian estimator is developed for a discrete distribution, which is very robust to noise. Although the distribution spread is not modelled,...
Nonlinear spatial encoding fields for magnetic resonance imaging (MRI) hold great promise to improve on the linear gradient approaches by, for example, enabling reduced imaging times. Imaging schemes that employ general nonlinear encoding fields are difficult to analyze using traditional measures. In particular, the resolution is spatially varying, characterized by a position-dependent point spread...
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