Table 2.
Summary of registration differences between different systems (n: number of comparisons)
| Absolute value of difference of registration shifts (mm); mean±SD (range) |
|||||
|---|---|---|---|---|---|
| Subsets of the comparisons of registration results |
Treatment site | LR dimension |
SI dimension |
AP dimension |
Three-dimension |
| TomoTherapy vs. the three | Head&neck (n=9) | 1.7±1.5 (0.6-5.4) | 2.3±1.4 (0.5-4.9) | 1.6±1.3 (0.4-3.1) | 3.8±1.2 (2.5-6.2) |
| software systems | Prostate (n=12) | 1.3±1.0 (0.1-3.1) | 1.6±1.4 (0.0-5.1) | 2.7±2.3 (0.2-6.3) | 3.9±2.0 (0.8-6.8) |
|
| |||||
| Elekta vs. the three | Head&neck (n=9) | 2.1±1.6 (0.4-5.0) | 1.4±0.7 (0.2-2.8) | 2.5±0.9 (1.4-4.0) | 3.8±1.4 (2.0-6.0) |
| software systems | Prostate (n=12) | 0.5±0.4 (0.0-1.3) | 1.4±0.8 (0.0-2.7) | 0.9±0.6 (0.1-1.8) | 1.9±0.6 (0.9-2.8) |
|
| |||||
| Varian vs. the three | Head&neck (n=9) | 3.6±3.2 (1.2-8.6) | 3.3±1.0 (1.6-4.4) | 2.6±0.6 (1.1-3.2) | 6.1±2.0 (3.4-9.2) |
| software systems | Prostate (n=9) | 1.3±1.1 (0.2-3.2) | 2.6±1.5 (0.5-4.9) | 1.5±0.8 (0.5-2.8) | 3.5±1.3 (1.1-5.0) |
|
| |||||
| All clinical results vs. the | Head&neck (n=27) | 2.5±2.3 (0.4-8.6) | 2.3±1.3 (0.2-4.9) | 2.3±1.0 (0.4-4.0) | 4.6±1.8 (2.0-9.2) |
| three software systems* | Prostate (n=33) | 1.0±0.9 (0.0-3.2) | 1.8±1.3 (0.0-5.1) | 1.7±1.6 (0.1-6.3) | 3.1±1.7 (0.8-6.8) |
|
| |||||
| Complete comparison | Head&neck (n=54) | 2.6±2.1 (0.1-8.6) | 1.7±1.3 (0.0-4.9) | 1.8±1.1 (0.1-4.0) | 4.1±1.9 (1.1-9.2) |
| between each other† | Prostate (n=66) | 1.1±1.0 (0.0-4.6) | 2.1±1.7 (0.0-6.6) | 2.0±1.8 (0.1-6.9) | 3.5±2.0 (0.2-8.3) |
*
Registration results from treatment systems are compared with the results from three software systems for all the cases. This is the union of the three subsets (i.e., TomoTherapy vs. softwares, Elekta vs. softwares, and Varian vs. softwares) of the comparisons.
†
All the results from different systems are compared each other. It includes the comparison between different software systems too.