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Abstract #0520

Self-calibrated off-resonance correction method for linogram MRI

Ali Ersoz1 and L Tugan Muftuler2,3

1Department of Biophysics, Medical College of Wisconsin, Milwaukee, WI, United States, 2Department of Neurosurgery, Medical College of Wisconsin, Milwaukee, WI, United States, 3Center for Imaging Research, Medical College of Wisconsin, Milwaukee, WI, United States

Although radial MRI has favorable properties, a major disadvantage is the image blurring caused by off-resonance effects. This is less tolerable than image distortions typically seen in Cartesian scans. Linogram MRI, which carries advantages of radial MRI, has an off-resonance behavior similar to Cartesian sampling. Thus, linogram combines the beneficial properties of two sampling techniques and avoids the disadvantages. In this study, we propose a self-calibrated off-resonance correction method for linogram sampling, which doesn’t require a field map. Both experimental phantom and human studies demonstrated that the proposed method significantly improved the image quality and provided sharper images.

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