Table 3.
Magnitude (cm) of interfraction GTV centroid motion for the twentieth fraction 4DCT scan
| Group |
LR |
AP |
SI |
F | P |
3D vector |
||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Range | Mean | SD | Range | Mean | SD | Range | Mean | SD | Range | Mean | SD | |||
| Upper |
0.04-0.14 |
0.08 |
0.04 |
0.01-0.39 |
0.13 |
0.13 |
0.09-1.30 |
0.40 |
0.39 |
4.405 |
0.023 |
0.12-1.30 |
0.46 |
0.38 |
| Mid- |
0.02-0.34 |
0.14 |
0.10 |
0.01-0.41 |
0.16 |
0.14 |
0.01-0.55 |
0.37 |
0.20 |
3.614 |
0.041 |
0.02-0.58 |
0.42 |
0.17 |
| Distal |
0.01-0.54 |
0.16 |
0.10 |
0.01-0.54 |
0.31 |
0.16 |
0.45-1.66 |
0.86 |
0.39 |
17.919 |
0.000 |
0.54-1.67 |
0.96 |
0.36 |
| F |
3.132 |
3.565 |
10.055 |
|
|
9.318 |
||||||||
| P | 0.062 | 0.044 | 0.001 | 0.001 | ||||||||||
Abbreviation: GTV gross tumor volume, 4DCT four-dimensional computed tomography, LR right–left, AP anterior–posterior, SI superior–inferior, 3D three-dimensional, SD standard deviation. “F”, the ratio of mean square about “between groups” and “within groups” used by one-way ANOVA; “P” , the significance based on two-tailed p values. Values of P < 0.05 were considered significant.