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• W3090572585 abstract "Nuclear magnetic resonance signal dynamics as described by the Bloch equations are highly complex and often are without closed form solutions. This is especially the case for quantitative magnetic resonance fingerprinting (MRF) scans in which acquisition parameters are varied to efficiently probe the parameter space. As previously demonstrated, optimization of the pattern in which the MRI acquisition parameters are varied relative to the variance in the target quantitative parameters can improve experiment design. This process, however, relies on large scale non-linear optimizations with hundreds to thousands of unknowns. As such, the numerical optimization is extremely time consuming, highly sensitive to guesses, and prone to getting caught in local minima. Here, we describe a method to reduce the complexity of the optimal MRF experiment design by constraining the solutions to span a predetermined low-dimensional subspace. Compared with standard flip angle patterns in calibration phantom experiments, precision in T2 can be increased by optimizing as few as 8 coefficients in less than one minute of computation time." @default.
• W3090572585 created "2020-10-08" @default.
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• W3090572585 date "2020-10-01" @default.
• W3090572585 modified "2023-10-05" @default.
• W3090572585 title "Reducing the Dimensionality of Optimal Experiment Design for Magnetic Resonance Fingerprinting." @default.
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