Spiral k-space trajectories are a powerful tool for in vivo 13C hyperpolarized cardiac MRI, however short readout durations limit the maximum resolution that single-shot spiral trajectories can achieve for a given field of view. This leaves the researcher with a choice at acquisition time, use a single-shot trajectory with poor spatial resolution or switch to a multiple-shot scheme with improved spatial resolution at the cost of degraded temporal resolution. We present a hybrid-shot spiral trajectory, which by compounding a single-shot and multiple-shot spiral, shifts this decision to analysis time.
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