Abstract #0520

Self-calibrated off-resonance correction method for linogram MRI

Ali Ersoz¹ and L Tugan Muftuler^2,3

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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