Navigator techniques for coronary MRA at 7 T

Table 1 Results from quantitative data analysis of coronary MRA.

	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

All p = n.s.
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.

ISSN: 1532-429X