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Abstract #4515

Retrospective 3D spiral trajectory correction: Exponential decay model vs. GIRF

Tobias Speidel1, Anja Schwarz2, Kilian Stumpf3, and Volker Rasche4

1Core-Facility Small Animal Imaging (CF-SANI), Ulm University, Ulm, Germany, 2Ulm University, Ulm, Germany, 3Ulm University Medical Center, Ulm, Germany, 4Experimental Cardiovascular MRI (ExCaVI), Ulm University Medical Center, Ulm, Germany

Uncorrected gradient imperfections lead to degrading image artifacts, especially in the case of demanding 3D trajectories. Different post-processing methods have been introduced to compensate for the real-time behaviour of the gradient system. This work shows that gradient waveform deviations can be vastly and nearly equally corrected using an exponential decay model as well as the gradient impulse response function. Both approaches were applied to a pure 3D spiral-like trajectory (Seiffert's spiral), achieving a comparable enhancement in image quality.

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