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Abstract #2647

A G-Factor Metric for K-T SENSE and K-T PCA

Christian Binter1, Rebecca Ramb2, Bernd Jung3, Sebastian Kozerke1, 4

1Institute for Biomedical Engineering, University and ETH Zurich, Zurich, Switzerland; 2Dept. of Radiology, Medical Physics , University Medical Center , Freiburg, Germany; 3Dept. of Radiology, Medical Physics , University Medical Center, Freiburg, Germany; 4Imaging Sciences and Biomedical Engineering, King's College London, London, United Kingdom

Spatiotemporal undersampling methods allow for significant speed-up of image acquisition. This work aims at providing an analytical assessment of noise behavior and temporal fidelity of k-t SENSE and k-t PCA. The g-factor formalism introduced for parallel imaging (SENSE, GRAPPA) is extended to the temporal frequency domain. Using in-vivo data it is demonstrated that the proposed g-factor shows good agreement with results obtained by pseudo-replica analysis for both k-t SENSE and k-t PCA, and also matches the temporal transfer function for k-t SENSE.