Keywords: Synthetic MR, Heart, dark blood MRI, Late Gadolinium Enhancement, left atrium
Motivation: Current bright-blood LGE MRI of the left atrium are suboptimal with low contrast between scar and surrounding blood. Dark-blood images can boost contrast but requires separate acquisition and largely unsuccessful in the left atrium due to technical challenges.
Goal(s): We propose a novel self-calibrated method called DarkSPARC designed to generate left atrial dark-blood LGE images retrospectively from standard bright-blood LGE acquisitions.
Approach: DarkSPARC enhances imaging quality by reencoding intensity into a calibrated spectral space, separating image details into spectral bins defined by the calibrator.
Results: The proposed method showed 13-fold increase in CNR and 2-fold increase in SNR.
Impact: DarkSPARC’s has the potential to improve LGE image quality while eliminating the need for separate dark-blood acquisitions, reducing scan time and patient discomfort. It may have potential applications beyond atrial imaging, for vessel wall imaging.
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