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. Author manuscript; available in PMC: 2012 Feb 14.
Published in final edited form as: Neuroimage. 2010 Oct 30;54(4):2779–2788. doi: 10.1016/j.neuroimage.2010.10.071

Table 1.

Scan parameters for the comparison of GRE and bSSFP at 3 T and 7 T

TR TE Flip anglea Band- width FOV Resolution # avg. Duty cycleb Scan timec
GRE 3 T 66.8 ms 45 ms 18° 4.72 kHz 20 × 15 × 4 cm3 0.5 × 0.5 × 2 mm2 1 63.4 % 400.8 sec
bSSFP 3 T 10 ms 4.5 ms 3° 31.25 kHz 20 × 15 × 4 cm3 0.5 × 0.5 × 2 mm2 1 64 % 60 sec
GRE 7 T 50 ms 30 ms 14° 8.33 kHz 24 × 18 × 0.2 cm3 0.5 × 0.5 × 2 mm2 4 57.6% 72 sec
bSSFP 7 T 10 ms 4.8 ms 3° 41.67 kHz 24 × 18 × 0.2 cm3 0.5 × 0.5 × 2 mm2 4 57.6% 14.4 sec
a

Flip angles were nominal values. In the 7 T experiment, multiple flip angles were acquired to find maximum CNR.

b

Duty cycle was calculated as the duration of the data acquisition period divided by TR.

c

Scan time was the total data acquisition time for a single center frequency excluding the dummy scan period.