Contrast-enhanced whole-heart coronary magnetic resonance angiography at 3.0 T: comparison with steady-state free precession technique at 1.5 T

Investigative Radiology
Xin LiuDebiao Li

Abstract

To compare contrast-enhanced whole-heart coronary MR angiography (MRA) at 3.0 T and noncontrast steady-state free precession coronary MRA at 1.5 T in the same volunteers. Nine healthy volunteers underwent both coronary MRA using 3D FLASH with slow infusion of MultiHance at 3.0 T and 3D TrueFISP sequence at 1.5 T. Neither beta-blockers nor nitroglycerine was administered in any of the imaging sessions. The same spatial resolution and heart coverage were used at both field strengths. Acquisition time, signal-to-noise ratio of coronary blood, contrast-to-noise ratio (CNR) between coronary blood and surrounding myocardium or connecting tissue, scores of image quality, coronary artery sharpness, and coverage of coronary segments for the 2 techniques were analyzed and statistically compared. There were no significant differences in heart rate (68 +/- 10 vs. 63 +/- 6 beats/min, P > 0.05) and navigator efficiency (34.1% +/- 7.7% vs. 34.8% +/- 9.2%, P > 0.05) at 3.0 T and 1.5 T coronary MRA during the data acquisition. The average acquisition time of the 3.0 T coronary MRA was significantly shorter than that of the1.5 T coronary MRA (9.7 +/- 2.3 vs. 14.6 +/- 3.5, P < 0.05). The mean score of image quality and vessel sharpness at 3.0 T w...Continue Reading

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