Table 1 Summary of characteristics for Bloch simulation numerically optimized saturation pulses
From: Saturation pulse design for quantitative myocardial T1 mapping
Flip Angle [°] | Duration [ms] | Relative RF Energy | Relative Peak RF Power | Residual |MZ/M0| [%] mean±std (max) | ||
|---|---|---|---|---|---|---|
Reference saturation pulses | 90°-90°-90° | 90-90-90 | 18.7 | 1.0 | 1.0 | 2.86±2.98 (11.31) |
BIR4-90 | 25.1 μT (adiabatic) | 11.1 | 11.0 | 4.1 | 0.92±0.92 (5.32) | |
Optimized for 1.5T | BIR4-90 | 20.6 μT (adiabatic) | 12.2 | 10.0 | 2.9 | 0.30±0.14 (0.91) |
B0 = ±120 Hz | 3 pulse train | 90−107−126 | 19.5 | 2.7 | 5.2 | 0.40±0.21 (0.80) |
\( {\widehat{B}}_1 \)=0.7–1.0 | 4 pulse train | 96−91−127−124 | 23.6 | 3.7 | 5.2 | 0.11±0.07 (0.25) |
B1 field = 26.9 μT | 5 pulse train | 89−106−89−145−127 | 27.4 | 4.7 | 5.2 | 0.06±0.03 (0.11) |
6 pulse train | 116−99−81−92−146−139 | 30.6 | 5.7 | 5.2 | 0.02±0.01 (0.04) | |
Optimized for 3T | 3 pulse train | 220−136−93 | 20.8 | 2.0 | 1.4 | 4.33±2.49 (8.70) |
B0 = ±240 Hz | 4 pulse train | 75−103−149−213 | 25.0 | 2.4 | 1.4 | 1.99±1.22 (4.17) |
\( {\widehat{B}}_1 \)= 0.4–1.2 | 5 pulse train | 99−76−120−169−220 | 29.2 | 3.0 | 1.4 | 0.64±0.41 (1.58) |
B1 field = 14 μT | 6 pulse train | 115−90−125−85−176−223 | 32.8 | 3.6 | 1.4 | 0.27±0.19 (0.87) |