3D spiral coronary artery wall imaging with beat-to-beat respiratory-motion-correction yielded significantly higher respiratory efficiency than navigator gating (99.6% vs 39.0%, P<0.0001).
Cross-Sectional (n=10)
Does 3D spiral coronary artery wall imaging with B2B-RMC improve respiratory efficiency and reproducibility compared to navigator-gated 2D acquisitions?
High-resolution 3D spiral imaging with beat-to-beat respiratory-motion-correction provides near 100% respiratory efficiency and excellent reproducibility for coronary vessel wall assessment.
Absolute Event Rate: 99.6% vs 39%
p-value: p=<0.0001
PURPOSE: To quantitatively assess the performance and reproducibility of 3D spiral coronary artery wall imaging with beat-to-beat respiratory-motion-correction (B2B-RMC) compared to navigator gated 2D spiral and turbo-spin-echo (TSE) acquisitions. MATERIALS AND METHODS: High-resolution (0.7 × 0.7 mm) cross-sectional right coronary wall acquisitions were performed in 10 subjects using four techniques (B2B-RMC 3D spiral with alternate (2RR) and single (1RR) R-wave gating, navigator-gated 2D spiral (2RR) and navigator-gated 2D TSE (2RR)) on two occasions. Wall thickness measurements were compared with repeated measures analysis of variance (ANOVA). Reproducibility was assessed with the intraclass correlation coefficient (ICC). RESULTS: In all, 91% (73/80) of acquisitions were successful (failures: four TSE, two 3D spiral (1RR) and one 3D spiral (2RR)). Respiratory efficiency of the B2B-RMC was less variable and substantially higher than for navigator gating (99.6 ± 1.2% vs. 39.0 ± 7.5%, P < 0.0001). Coronary wall thicknesses (± standard deviation SD) were not significantly different: 1.10 ± 0.14 mm (3D spiral (2RR)), 1.20 ± 0.16 mm (3D spiral (1RR)), 1.14 ± 0.15 mm (2D spiral), and 1.21 ± 0.17 mm (TSE). Wall thickness reproducibility ranged from good (ICC = 0.65, 3D spiral (1RR)) to excellent (ICC = 0.87, 3D spiral (2RR)). CONCLUSION: High-resolution 3D spiral imaging with B2B-RMC permits coronary vessel wall assessment over multiple thin contiguous slices in a clinically feasible duration. Excellent reproducibility of the technique potentially enables studies of disease progression/regression.
Scott et al. (Wed,) reported a cross-sectional. 3D spiral coronary artery wall imaging with beat-to-beat respiratory-motion-correction vs. Navigator-gated 2D spiral and turbo-spin-echo (TSE) acquisitions was evaluated on Respiratory efficiency (p=<0.0001). 3D spiral coronary artery wall imaging with beat-to-beat respiratory-motion-correction yielded significantly higher respiratory efficiency than navigator gating (99.6% vs 39.0%, P<0.0001).