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Abstract #1544

An improved algorithm for trajectory correction in radial MRI

Guido Buonincontri 1 , Carmen Methner 2 , Thomas Krieg 2 , T Adrian Carpenter 1 , and Stephen J Sawiak 1

1 Wolfson Brain Imaging Centre, Department of Clinical Neurosciences, University of Cambridge, Cambridge, United Kingdom, 2 Department of Medicine, University of Cambridge, Cambridge, United Kingdom

Radial acquisitions can suffer from trajectory errors leading to reduced image quality. We present a new method of trajectory correction that uses all spokes of a radial acquisition, including B0 correction, and compare it to an existing method that uses a two-spoke pre-scan calibration, demonstrating this in the mouse heart. We also compared the quality of navigator signals obtained from the radial data with each technique. The typical shading artifacts seen in radial scans were significantly reduced with our method. Furthermore, modulation of navigator signals due to the acquisition angle was significantly reduced with the new technique.

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