Fast Field Inhomogeneity and Concomitant Gradient Field Correction in Spiral Cardiac Imaging

Joseph Yitan Cheng¹, Juan M. Santos^1,2, John M. Pauly¹

Off-resonance blurring from main field inhomogeneities and concomitant gradient fields degrade the quality of spiral imaging. For cardiac imaging, off-isocenter acquisitions are unavoidable resulting in significant artifacts from these effects. We present the importance of correcting both the field inhomogeneity and the concomitant gradient field using two fast and accurate algorithms. The advantages of our algorithms are demonstrated in cardiac imaging: their computation speed in a real-time study and their accuracy in a high-resolution study.