ABSTRACT
PURPOSE: To 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. METHODS: Eleven 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. RESULTS: SG was successful in all volunteers with image-based SG and the ∑||p|| 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. CONCLUSION: Respiratory 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.
