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Single breath-hold extended free-breathing navigator-gated three-dimensional coronary MRA
Michael E Huber1, Markus E Oelhafen, Sebastian Kozerke
1Institute of Biomedical Engineering of the University and ETH Zurich, Switzerland.
Purpose:
To acquire the center of k-space while extending three-dimensional free-breathing navigator-gated coronary magnetic resonance (MR) angiography by an initial single breath-hold.
Materials And Methods:
This approach was successfully applied in eight healthy adult subjects. Resulting images were compared with conventionally acquired free-breathing navigator-gated MR angiograms.
Results:
The acquisition of k-space center during the single breath-hold resulted in a 26% increase (P < 0.05) of signal-to-noise ratio. Visible length of the right coronary artery, as well as contrast-to-noise ratio between the blood and the myocardial muscle, were identical.
Conclusion:
The breath-hold extension was shown to be a valuable technique that may be combined with first-pass contrast-enhanced MR imaging.