Spiral and EPI are the most commonly used trajectories for imaging hyperpolarized 13C substrates. In this work, the two acquisition methods are compared with regard to B0 and T2* effects for typical parameter sets used for in vivo imaging of the heart. While Spirals exhibit higher SNR, EPI trajectories show higher effective resolution with standard gradient system performance. The relative differences in SNR and resolution between the two trajectories reduce with the availability of high-performance gradients.
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