It has been previously shown that a 3D golden ratio stack of spirals sequence is suitable for fast thoracic MRI, including cardiac gated and elapsed time reconstructions. This work examines the feasibility of including a respiratory motion-state dimension. 5D thoracic datasets have been reconstructed using ESPIRiT to resolve along the cardiac and respiratory cycles. Although challenges exist, preliminary testing indicates that this is an effective method to increase data efficiency, thereby improving image quality and/or reducing the time of acquisition.
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