A novel phaser adiabatic T2-preparation module for cardiac MRI significantly reduced fat signal-to-noise ratio and increased right coronary artery conspicuity compared with conventional techniques.
Does a novel phaser adiabatic T2-Prep module improve fat suppression and vessel sharpness compared to conventional T2-Prep methods in cardiac MRI at 3T?
A novel phaser adiabatic T2-preparation module for 3T cardiac MRI provides robust fat suppression and improves coronary artery visualization without needing an additional fat-suppression module.
Purpose Designing a new T 2 ‐preparation (T 2 ‐Prep) module to simultaneously provide robust fat suppression and efficient T 2 preparation without requiring an additional fat‐suppression module for T 2 ‐weighted imaging at 3T. Methods The tip‐down radiofrequency (RF) pulse of an adiabatic T 2 ‐Prep module was replaced by a custom‐designed RF‐excitation pulse that induces a phase difference between water and fat, resulting in a simultaneous T 2 preparation of water signals and the suppression of fat signals at the end of the module (a phaser adiabatic T 2 ‐Prep). Numerical simulations and in vitro and in vivo electrocardiogram (ECG)‐triggered navigator‐gated acquisitions of the human heart were performed. Blood, myocardium, and fat signal‐to‐noise ratios and right coronary artery vessel sharpness were compared against previously published adiabatic T 2 ‐Prep approaches. Results Numerical simulations predicted an increased fat‐suppression bandwidth and decreased sensitivity to transmit magnetic field inhomogeneities using the proposed approach while preserving the water T 2 ‐Prep capabilities. This was confirmed by the tissue signals acquired in the phantom and the in vivo images, which show similar blood and myocardium signal‐to‐noise ratio, contrast‐to‐noise ratio, and significantly reduced fat signal‐to‐noise ratio compared with the other methods. As a result, the right coronary artery conspicuity was significantly increased. Conclusion A novel fat‐suppressing T 2 ‐Prep method was developed and implemented that showed robust fat suppression and increased vessel sharpness compared with conventional techniques while preserving its T 2 ‐Prep capabilities.
Arn et al. (Wed,) conducted a other in Cardiac magnetic resonance imaging. Phaser adiabatic T2-preparation module vs. Previously published adiabatic T2-Prep approaches was evaluated on Blood, myocardium, and fat signal-to-noise ratios and right coronary artery vessel sharpness. A novel phaser adiabatic T2-preparation module for cardiac MRI significantly reduced fat signal-to-noise ratio and increased right coronary artery conspicuity compared with conventional techniques.
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