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Abstract #1841

DarkSPARC: Novel Method for Self-Calibrated Spectral Formation of Left Atrial Dark-Blood from Bright-Blood LGE MRI

Mohammed S.M. Elbaz1
1Radiology, Northwestern University, Chicago, IL, United States

Synopsis

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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