Reversed half-echo stack-of-stars TrueFISP (TrueSTAR)

Magnetic Resonance in Medicine : Official Journal of the Society of Magnetic Resonance in Medicine
Grzegorz Bauman, Oliver Bieri

Abstract

To introduce a reversed half-echo readout scheme for artifact-free two-dimensional (2D) radial and three-dimensional (3D) stack-of-stars TrueFISP imaging, termed TrueSTAR. TrueSTAR imaging (echo time [TE]/repetition time [TR] = 0.94/1.62 ms for 2D, TE/TR = 0.85/1.21 ms for 3D) was evaluated in phantoms and for in vivo chest imaging at 1.5T and was compared with contemporary center-out (TE/TR = 0.66/1.62 ms for 2D, TE/TR = 0.36/1.21 ms for 3D) and symmetric (TE/TR = 0.93/1.86 ms for 2D, TE/TR = 0.85/1.70 ms for 3D) radial acquisition schemes in terms of image quality and severity of artifacts. Images obtained using a center-out sampling scheme were blurred as a result of trajectory inconsistencies in the k-space center, whereas in vivo acquisitions with symmetric sampling were prone to banding artifacts from the increased TR, compared with center-out and TrueSTAR acquisitions. In contrast, TrueSTAR imaging inherits both benefits, namely, a short TR from the half-echo readout, resulting in reduced banding artifacts, and a high trajectory fidelity in the k-space center from center-in trajectories, yielding an improved signal homogeneity. In addition, near artifact-free 3D TrueSTAR chest imaging (TE/TR = 0.88/1.27 ms) is demonstrat...Continue Reading

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Citations

Jan 4, 2018·Journal of Magnetic Resonance Imaging : JMRI·Orso PusterlaOliver Bieri
Dec 7, 2019·Magnetic Resonance in Medicine : Official Journal of the Society of Magnetic Resonance in Medicine·Grzegorz Bauman, Oliver Bieri
Oct 25, 2016·Magnetic Resonance in Medicine : Official Journal of the Society of Magnetic Resonance in Medicine·Orso PusterlaOliver Bieri
May 19, 2017·Magnetic Resonance in Medicine : Official Journal of the Society of Magnetic Resonance in Medicine·Grzegorz BaumanOliver Bieri

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