Journal
MAGNETIC RESONANCE IN MEDICINE
Volume 81, Issue 2, Pages 1066-1079Publisher
WILEY
DOI: 10.1002/mrm.27472
Keywords
atrial walls; black-blood; bright-blood; pulmonary veins
Funding
- EPSRC [EP/N009258/1, EP/P001009/1, EP/P007619/1]
- MRC [MR/L009676/1]
- FONDECYT [1161051]
- Welcome EPSRC Centre for Medical Engineering [WT203148/Z/16/Z]
- National Institute for Health Research (NIHR) comprehensive Biomedical Research Centre award
- St. Thomas' NHS Foundation Trust
- King's College Hospital NHS Foundation Trust
- King's College London
- EPSRC [EP/P001009/1, EP/N009258/1, EP/P007619/1] Funding Source: UKRI
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Purpose: Pre-interventional assessment of atrial wall thickness (AWT) and of subject-specific variations in the anatomy of the pulmonary veins may affect the success rate of RF ablation procedures for the treatment of atrial fibrillation (AF). This study introduces a novel non-contrast enhanced 3D whole-heart sequence providing simultaneous information on the cardiac anatomy-including both the arterial and the venous system-(bright-blood volume) and AWT (black-blood volume). Methods: The proposed MT-prepared bright-blood and black-blood phase sensitive inversion recovery (PSIR) BOOST framework acquires 2 differently weighted bright-blood volumes in an interleaved fashion. The 2 data sets are then combined in a PSIR-like reconstruction to obtain a complementary black-blood volume for atrial wall visualization. Image-based navigation and non-rigid respiratory motion correction are exploited for 100% scan efficiency and predictable acquisition time. The proposed approach was evaluated in 11 healthy subjects and 4 patients with AF scheduled for RF ablation. Results: Improved depiction of the cardiac venous system was obtained in comparison to a T-2-prepared BOOST implementation, and quantified AWT was shown to be in good agreement with previously reported measurements obtained in healthy subjects (right atrium AWT: 2.54 +/- 0.87 mm, left atrium AWT: 2.51 +/- 0.61 mm). Feasibility for MT- prepared BOOST acquisitions in patients with AF was demonstrated. Conclusion: The proposed motion-corrected MT-prepared BOOST sequence provides simultaneous non-contrast pulmonary vein depiction as well as black-blood visualization of atrial walls. The proposed sequence has a large spectrum of potential clinical applications and further validation in patients is warranted.
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