TY - CHAP
T1 - Magnetic Field Monitoring of Radial Trajectories
AU - Giese, Daniel
AU - Kolbitsch, Christoph
AU - Aitken, Andy
AU - Buehrer, Martin
AU - Schaeffter, Tobias
AU - Kozerke, Sebastian
PY - 2012
Y1 - 2012
N2 - Radial k-space trajectories are widely used in motion correction applications and for undersampled acquisitions given the repeated sampling of the centre of k-space. Radials are, however, prone to eddy currents and gradient delays effects. In this work, we analyze the miscentering of k-space using a 3rd order magnetic field camera, measuring k-space and quantifying gradient delays and eddy currents. Single slice, dual slice and cardiac cine images are acquired in-vivo and corrected using the measured trajectories reducing the level of artifacts. The method uses a single preparation scan to acquire k-space and can be used for any angular spoke distribution and level of undersampling.
AB - Radial k-space trajectories are widely used in motion correction applications and for undersampled acquisitions given the repeated sampling of the centre of k-space. Radials are, however, prone to eddy currents and gradient delays effects. In this work, we analyze the miscentering of k-space using a 3rd order magnetic field camera, measuring k-space and quantifying gradient delays and eddy currents. Single slice, dual slice and cardiac cine images are acquired in-vivo and corrected using the measured trajectories reducing the level of artifacts. The method uses a single preparation scan to acquire k-space and can be used for any angular spoke distribution and level of undersampling.
M3 - Conference paper
T3 - Proceedings of the annual meeting of ISMRM
SP - 3389
EP - 3389
BT - Electronic Poster Session - Pulse Sequences and Reconstruction A
PB - ISMRM
ER -