High-Resolution Respiratory Self-Gated Golden Angle Cardiac MRI: Comparison of Self-Gating Methods in Combination with k-t SPARSE SENSE

PurposeTo compare the applicability of different self-gating (SG) strategies for respiratory SG in cardiac MRI in combination with iteratively reconstructed (k-t SPARSE SENSE) cine data with low and high temporal resolution. MethodsEleven SG variants were compared in five volunteers by assessment of the resulting image sharpness compared with nongated reconstructions. Promising SG techniques were applied for high temporal resolution reconstructions of the heart function. ResultsSG was successful in all volunteers with image-based SG and the Sigma parallel to p parallel to technique. These approaches were also superior to gating from the respiratory bellows signal on average. Combination with k-t SPARSE SENSE enabled high temporally resolved visualization of the heart motion with free breathing. ConclusionRespiratory SG can be applied for improving image sharpness. Combining SG with iterative reconstruction allows generation of high temporal resolution cine data, which reveal more details of cardiac motion. Magn Reson Med 73:292-298, 2015. (c) 2014 Wiley Periodicals, Inc.