Table 2.
Absolute error and stability of MR thermometry measured with and without motion in phantoms and in in vivo pig back muscle.
Absolute Error (°C) | Stability (°C) | ||||||
---|---|---|---|---|---|---|---|
Temporal mean of |Tmean - Probe | Temporal SD of spatial mean | ||||||
Experiment | N | Motion | No Motion | p-value | Motion | No Motion | p-value |
Phantom | |||||||
Heating (60 Watts) | 3 | 1.2 ±0.0 | 0.4 ± 0.1 | .0001 | 1.3 ±0.1 | 0.5 ±0.0 | .0003 |
No heating (0 Watts) | 3 | 1.0 ±0.3 | 0.3 ± 0.1 | .0307 | 0.8 ±0.3 | 0.4 ±0.2 | .2010 |
In vivo | |||||||
Heating (60–80 Watts) | 5 | 1.2 ±0.4 | 0.6 ±0.1 | .0181 | 1.4 ±0.6 | 0.8 ±0.3 | .0875 |
No heating (0 Watts) | 7 | 1.2 ±0.5 | 0.7 ±0.3 | .0181 | 1.2 ±0.5 | 0.6 ±0.1 | .0029 |