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• W2964120646 abstract "In high-dimensional magnetic resonance imaging applications, time-consuming, sequential acquisition of data samples in the spatial frequency domain (k-space) can often be accelerated by accounting for dependencies in linear reconstruction, at the cost of noise amplification that depends on the sampling pattern. Common examples are support-constrained, parallel, and dynamic MRI, and k-space sampling strategies are primarily driven by image-domain metrics that are expensive to compute for arbitrary sampling patterns. It remains challenging to provide systematic and computationally efficient automatic designs of arbitrary multidimensional Cartesian sampling patterns that mitigate noise amplification, given the subspace to which the object is confined. To address this problem, this paper introduces a theoretical framework that describes local geometric properties of the sampling pattern and relates them to the spread in the eigenvalues of the information matrix described by its first two spectral moments. This new criterion is then used for very efficient optimization of complex multidimensional sampling patterns that does not require reconstructing images or explicitly mapping noise amplification. Experiments with in vivo data show strong agreement between this criterion and traditional, comprehensive image-domain- and k-space-based metrics, indicating the potential of the approach for computationally efficient (on-the-fly), automatic, and adaptive design of sampling patterns." @default.
• W2964120646 created "2019-07-30" @default.
• W2964120646 creator A5063771498 @default.
• W2964120646 creator A5064688614 @default.
• W2964120646 date "2018-02-01" @default.
• W2964120646 modified "2023-10-18" @default.
• W2964120646 title "On-the-Fly Adaptive ${k}$ -Space Sampling for Linear MRI Reconstruction Using Moment-Based Spectral Analysis" @default.
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• W2964120646 doi "https://doi.org/10.1109/tmi.2017.2766131" @default.
• W2964120646 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/5840375" @default.
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• W2964120646 hasPublicationYear "2018" @default.
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