Table 2.
The impact of the bone‐suppression‐based CT‐MR fusion, GRE and 2‐D searching on the accuracy of the final synthetic CTs generated by our proposed algorithm. Numbers show the mean and standard deviation of the mean absolute error (MAE) between the synthetic CTs (generated using different methods of averaging (Equally weighted (without 2D searching) vs. GRE (γ = 5)‐weighted) and with/without 2D searching) and deformed planning CTs
| Registration scheme | W/O bone suppression | W/Bone suppression | |||
|---|---|---|---|---|---|
| Equally weighted | Equally weighted | GRE‐weighted W/O 2‐D searching | GRE‐weighted W/2‐D searching | ||
| Entire CT | Mean | 145 | 86 | 68 | 64 |
| STD | 18 | 10 | 10 | 10 | |
| Air | Mean | 235 | 159 | 121 | 113 |
| STD | 18 | 24 | 13 | 12 | |
| Bone | Mean | 262 | 183 | 145 | 130 |
| STD | 14 | 38 | 30 | 28 | |