Table 1. Nominal values of the initial excitation angle (p0), flip angle of each sub-pulse (α), total flip angle (TotalFA), B1+ intensity, total duration of the RF-pulses, echo times (TE) and repetition times (TR) for the experiments performed in phantom and in vivo, at 3.0 T and 7.0 T, with methods A–E.
Method | p0 | α | TotalFA | Total Duration | B1+ intensity | TE | TR [ms] at 3.0 T | TR [ms] at 7.0 T |
[deg] | [deg] | [deg] | [µs] | [µT] | [ms] | phantom/in vivo | phantom/in vivo | |
A | - | 20 | 120 | 600 | 13.0 | 1.55 | 30/30 | 110/110 |
B | - | 40 | 120 | 600 | 13.0 | 1.42 | 30/30 | 110/110 |
C | 20 | 15 | 140 | 490 | 14.6 | 1.47 | 30/30 | 110/110 |
D | 20 | 250 | 270 | 4250 | 4.14 | 5.21 | 30/30 | 110/110 |
E | - | 45 | 90 | 325 | 18.1 | 1.25 | 30/30 | 110/110 |
DAM | - | 60 | 60 | 300 | 13.0 | 2.00 | 500/6000 | 500/6000 |
120 | 120 | 600 | 13.0 | 500/6000 | 500/6000 |
Also the parameters for the comparison with the DAM are listed. The echo times are calculated relatively to the center of the first sub-pulse for each method.