B (mT) | dB/dt (mT/s) | |||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|
Nobs | Nsub | AM | GM | GSDBW | GSDWW | Range | AM | GM | GSDBW | GSDWW | Range | |
Magnet strength | ||||||||||||
Instantaneous Peak exposure | ||||||||||||
1.5 T | 138 | 94 | 594 | 417 | 2.38 | 1.72 | 20–2891 | 1048 | 539 | 3.01 | 2.05 | 9–12 455 |
3.0 T | 6 | 5 | 1261 | 1249 | 1.13 | 1.06 | 1069–1588 | 1560 | 1427 | 1.23 | 1.11 | 961–1903 |
1.5 and 3.0T | 3 | 3 | 1283 | 1274 | 1.13 | –* | 1069–1412 | 1848 | 1731 | 1.42 | – | 1263–2833 |
Total | 147† | 102‡ | 635 | 447 | 2.23 | 2.41 | 20–2891 | 1082 | 574 | 2.81 | 2.78 | 9–12 455 |
SWA | ||||||||||||
1.5 T | 138 | 94 | 18 | 16 | 1.29 | 1.53 | 5–64 | 16 | 14 | 1.32 | 1.43 | 9–105 |
3.0 T | 6 | 5 | 24 | 23 | 2.15 | 1.00 | 15–38 | 18 | 17 | 1.35 | 1.04 | 10–23 |
1.5 and 3.0 T | 3 | 3 | 22 | 19 | 1.67 | – | 12–40 | 27 | 26 | 1.36 | – | 19–39 |
Total | 147 | 102 | 19 | 16 | 1.39 | 1.64 | 5–64 | 16 | 14 | 1.33 | 1.58 | 9–105 |
XWA | ||||||||||||
1.5 T | 138 | 94 | 28 | 26 | 1.20 | 1.40 | 11–64 | 19 | 16 | 1.36 | 1.43 | 9–124 |
3.0 T | 6 | 5 | 50 | 47 | 1.50 | 1.00 | 27–89 | 27 | 25 | 1.53 | 1.05 | 16–46 |
1.5 and 3.0 T | 3 | 3 | 37 | 35 | 1.42 | – | 22–50 | 31 | 30 | 1.22 | – | 25–40 |
Total | 147 | 102 | 29 | 27 | 1.34 | 1.57 | 11–89 | 19 | 17 | 1.37 | 1.60 | 9–124 |
*No within-participant repeats were available for 1.5 and 3.0 T MR systems.
†No information on magnet strength was reported in two MR procedures.
‡Higher number of participants (compared to table 3) because some of the participants worked on different MR systems from day-to-day.
AM, arithmetic mean; GM, geometric mean; GSDBW, between-participant geometric SD; GSDWW, within-participant geometric SD; Nobs, number of observations; Nsub, number of individual participants; SMF, static magnetic fields.