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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