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The minimum flip angle βmin required to saturate Mz,γ-ATP to below 5% of its equilibrium value over a bandwidth of 40Hz with the corresponding PCr spill-over Q for constant (m=1) and amplitude modulated (m=5) irradiation at 9cm depth and at the surface. Close to the coil, the flip-angle is about 6-times higher, increasing the spillover irradiation and reducing Q.
| m | β[°] | Q | |
|---|---|---|---|
| βmin at 9cm depth | 1 | 5.1 | 0.81 |
| 5 | 0.9 | 0.93 | |
| at surface 6*βmin | 1 | 30.6 | 0.11 |
| 5 | 5.4 | 0.45 |
