Projection Distribution of 3D UTE Sequences for Sodium MRI with Anisotropic Resolution and Uniform Sampling

SNR-efficient sequences with short echo times are required for imaging of spin>1/2 nuclei. Established ultra-short echo (UTE) time sequences are 3D radial techniques with density adaption and twisted projection imaging. However, so far no UTE sampling strategy exists for anisotropic resolution with uniform k-space sampling for highest SNR efficiency. In this study, projections are distributed on rings so that uniform sampling and optimal SNR efficiency is achieved for UTE imaging with anisotropic resolution if no postfiltering is required.

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