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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