ArticleMagnetic resonance in medicine2026
Feasibility Study for Dual Phase Free Breathing 3D bSSFP MRA With Preserved Eddy-Current Tolerance With Adaptive k-Space Lengths (PETAL) Acquisition.
Article in Magnetic resonance in medicine, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 1 paper.
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1 citing paper in PubMed.
- Feasibility Study for Dual Phase Free Breathing 3D bSSFP MRA With Preserved Eddy-Current Tolerance With Adaptive k-Space Lengths (PETAL) Acquisition.Magnetic resonance in medicine · 2026Article
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12 authors.
Funding
Abstract
purposeTo demonstrate the feasibility of a novel dual-phase self-navigated, free-breathing balanced steady-state free-precession whole-heart MRA acquisition for aortic annulus size measurement using a Cartesian trajectory that mitigates eddy-current artifacts by minimizing k-space jumps between consecutive readouts with predictable scan times.
methodsThe proposed method uses a trajectory with Preserved Eddy-current Tolerance with Adaptive k-space Lengths (PETAL) that enables the acquisition of multiple navigators per heartbeat to address respiratory motion throughout a 330-510 ms acquisition window across different cardiac phases. Imaging was performed in 15 healthy volunteers on a 3 T MR system using a sequence compiled in Pulseq. Images were reconstructed in systole and diastole. Aortic annulus perimeter and area were measured for both cardiac phases. A clinical MRA and a breath-held 2D bSSFP cine planned at the valve plane were used to statistically compare metrics in diastole and systole, respectively.
resultsIn diastole, the PETAL sequence yielded a high correlation with the clinical reference for aortic annulus area (
conclusionThe proposed approach enables dual-phase, contrast-free, free-breathing acquisition of isotropic 3D whole-heart images in predictable 10 min scan times for aortic size measurements in systole and diastole.
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