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Abstract #0445

Simple Auto-Calibrated Gradient Delay Estimation From Few Spokes Using Radial Intersections (RING) for Interactive Real-time MRI

Sebastian Rosenzweig1,2, H. Christian M. Holme1,2, and Martin Uecker1,2

1Institut für Diagnostische und Interventionelle Radiologie, University Medical Center Göttingen, Göttingen, Germany, 2Partner site Göttingen, German Centre for Cardiovascular Research (DZHK), Göttingen, Germany

Radial k-space trajectories are popular for fast imaging but come at the expense of a high sensitivity to system imperfections such as eddy currents and gradient delays. Current gradient delay compensation strategies often demand calibration scans or many spokes for auto-calibration and can be computationally demanding. Here, we use the novel RING approach to estimate the gradient delays for each frame of a real-time cardiac MRI measurement to reliably remove streaking artifacts, even if the slice position is changed interactively.

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