Table 1.
Comparison of main scan parameters for each of the ∆B 0 acquisition methods
| ∆B 0 mapping | TR [ms] | TE1 [ms] | TE2 [ms] | BW [Hz/Px] | k‐space lines / shot | Miscellaneous | |
|---|---|---|---|---|---|---|---|
| STATIC | CEST‐minZ | 9.5 | 1.74 | ‐ | 780 | 1 | Ts = 700 ms, B1rms = 2.0 µT, ∆ω = 0.15/0.11 ppm |
| WASSR | 4.5 | 1. 74 | ‐ | 780 | 1 | Ts = 100 ms, B1rms = 0.2 µT, ∆ω = 0.05/0.01 ppm | |
| GRE‐2TE | 9.5 | 1.74 | 5.16 | 780 | 1 | ||
| DYNAMIC | CEST‐GRE‐2TE | 9.5 | 1.74 | 5.16 | 780 | 1 | Ts = 700 ms, B1rms = 2.0 µT, ∆ω = 0.15/0.11 ppm |
| CEST‐GRE‐1TE | 9.5 | 1.74 | ‐ | 780 (390)* | 1 | Ts = 700 ms, B1rms = 2.0 µT, ∆ω = 0.15/0.11 ppm | |
| NAV‐EPI‐2TE | 15 | 5.4 | 9.0 | 2442 | 4 |
*
The experimentally used readout BW of 780Hz/Px stated here for CEST‐GRE‐1TE, could be in practice halved to 390Hz/Px, thereby matching the readout duration of two echoes of the CEST‐GRE‐2TE readout. Averaging these two echoes of the CEST‐GRE‐2TE readout with 780Hz/Px BW, should result in very similar SNR as the single CEST‐GRE‐1TE readout with 390Hz/Px BW.