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Table 3 RF pulse calibration output at 10 trials of the experiment

From: Iterative multi-channel radio frequency pulse calibration with improving B1 field uniformity in high field MRI

 

Initial condition

RF pulse calibration output

Trial #1

Trial #2

Trial #3

Trial #4

Trial #5

Trial #6

Trial #7

Trial #8

Trial #9

Trial #10

No. of iterations

 

43

40

43

57

36

34

35

34

38

35

a 1 /a 2

1

0.74

0.73

0.74

0.74

0.74

0.70

0.70

0.71

0.71

0.71

Δθ [deg]

90

91.3

92.2

90.6

90.4

90.7

90.8

91

90.7

90.7

90.9

η [%]

21.44

15.0

15.2

14.7

14.6

14.9

14.9

15.0

14.9

14.9

14.9

  1. The iterative RF pulse calibration used the quadrature-mode excitation as an initial condition.