Journal: Journal of Cardiovascular Magnetic Resonance

Article Title: Comprehensive three-dimensional free-breathing magnetic resonance imaging for simultaneous myocardial viability and coronary artery visualization at 1.5T and 3T

doi: 10.1016/j.jocmr.2025.102672

Figure Lengend Snippet: Sequence and reconstruction framework of the proposed GB-BOOST sequence. Two interleaved electrocardiogram-triggered 3D volumes are acquired using 2-point Dixon GRE acquisition with IR and T2prep, respectively. iNAV enables 100% respiratory scan efficiency. A variable-density Cartesian trajectory with spiral-like profile order and golden-angle step is adopted with five-fold undersampling. Inline non-rigid MoCo iterative SENSE reconstruction and water/fat separation are performed to obtain IR and T2prep water/fat volumes, which is followed by offline HD-PROST denoising and PSIR reconstruction to finally produce IR GB-BOOST, T2prep GB-BOOST, and PSIR GB-BOOST images. GRE gradient echo, IR inversion recovery, T2prep T2 preparation, iNAV image navigator, MoCo motion corrected, HD-PROST high-dimensional patch-based low-rank regularization, PSIR phase sensitive inversion recovery, GB-BOOST Gray-Blood and Bright-blOOd phase SensiTive inversion recovery

Article Snippet: A two-dimensional image navigator (iNAV) is acquired before the acquisition of each volume to detect respiratory motion for motion-corrected reconstruction, enabling free-breathing acquisition with 100% respiratory scan efficiency .

Techniques: Sequencing

Journal: Journal of Cardiovascular Magnetic Resonance

Article Title: Free-breathing three-dimensional high-resolution Dixon late gadolinium enhancement imaging for chronic myocardial infarction assessment at 3T

doi: 10.1016/j.jocmr.2025.102668

Figure Lengend Snippet: 3D Dixon and 2D PSIR LGE imaging of patients with chronic myocardial infarction scanned at 3T. Respiratory ghosts were detected in the 2D PSIR LGE image, whereas the iNAV 3D Dixon LGE images demonstrated artifact-free visualization of LGE ( a and b ). 3D isotropic LGE imaging enables detection of diagnostically challenging subtle subendocardial lesions that remain elusive on conventional 2D sequence ( c and d ). 3D three-dimensional, 2D two-dimensional, PSIR phase-sensitive inversion recovery, LGE late gadolinium enhancement, iNAV image navigation

Article Snippet: Image navigation (iNAV) with direct respiratory motion tracking of the heart has been introduced and enables 100% respiratory gating efficiency and predictable scan time.

Techniques: Imaging, Sequencing