Cardiac cine magnetic resonance fingerprinting for combined ejection fraction, T₁ and T₂ quantification.

ABSTRACT: This study introduces a technique called cine magnetic resonance fingerprinting (cine-MRF) for simultaneous T₁ , T₂ and ejection fraction (EF) quantification. Data acquired with a free-running MRF sequence are retrospectively sorted into different cardiac phases using an external electrocardiogram (ECG) signal. A low-rank reconstruction with a finite difference sparsity constraint along the cardiac motion dimension yields images resolved by cardiac phase. To improve SNR and precision in the parameter maps, these images are nonrigidly registered to the same phase and matched to a dictionary to generate T₁ and T₂ maps. Cine images for computing left ventricular volumes and EF are also derived from the same data. Cine-MRF was tested in simulations u

SUBMITTER: Hamilton JI 

PROVIDER: S-EPMC7772953 | biostudies-literature | 2020 Aug

REPOSITORIES: biostudies-literature