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Table 1 Results from quantitative data analysis of coronary MRA.

From: Navigator techniques for coronary MRA at 7 T

  2D-selective pencil beam navigator Non-selective navigator
SNR blood 30.1 ± 17.0 24.8 ± 14.5
RCA vessel length (cm) 7.47 ± 2.84 6.49 ± 1.29
RCA vessel sharpness (%) 58 ± 9 53 ± 5
RCA vessel diameter (mm) 2.86 ± 0.25 2.88 ± 0.26
CNR 25.3 ± 15.2 20.8 ± 14.2
Acquisition time (sec) 560 ± 210 508 ± 210
Navigator efficiency (%) 52 ± 22 51 ± 12
  1. All p = n.s.
  2. RCA: right coronary artery, SNR: signal (blood pool in aorta, near the offspring of the RCA) to noise ratio, CNR: Contrast (between blood pool and myocardium) to noise ratio.