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Abstract #1545

Image based correction of radial trajectory shifts

Judith Biermann 1 , Martin Krmer 1 , and Jrgen R Reichenbach 1

1 Medical Physics Group, Institute of Diagnostic and Interventional Radiology I, Jena University Hospital - Friedrich Schiller University Jena, Jena, Germany

When performing MR imaging with radial trajectories time delays of readout gradients cause severe artifacts in the reconstructed images. A correction algorithm was implemented using only the acquired data without additional calibration or template measurements. Radial data were shifted along their readout direction by applying a range of discrete readout shifts. By analyzing the reconstructed image for each shift, a corrected image was obtained fully automatically. The proposed method was tested in phantom and in vivo data and proved its reliability.

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