FIGURE 1.
FIGURE 2.
FIGURE 3.
FIGURE 4.
FIGURE 5.
Target volume expansion boundary in the three-dimensional direction in 65 patients in the breast bracket and Styrofoam groups (mm)
| Styrofoam | Bracket | ||||||
|---|---|---|---|---|---|---|---|
| X | Y | Z | X | Y | Z | ||
| Σ Systematic error | CROI | 1.59 | 1.99 | 1.78 | 2.05 | 2.10 | 2.00 |
| SROI | 1.23 | 1.23 | 1.36 | 1.32 | 1.16 | 1.75 | |
| σ Random error | CROI | 1.47 | 1.46 | 1.46 | 1.39 | 1.57 | 1.57 |
| SROI | 0.88 | 1.12 | 1.26 | 0.98 | 1.17 | 1.54 | |
| MPTV | CROI | 5.01 | 5.99 | 5.47 | 6.10 | 6.34 | 6.10 |
| SROI | 3.69 | 3.86 | 4.28 | 3.99 | 3.72 | 5.45 | |
Comparison of clinical data between the two groups
| Group | Styrofoam n = 36 | Bracket n = 29 | P-value |
|---|---|---|---|
| Age (x ± s, years) | 48.34 ± 9.58 | 48.90 ± 10.92 | 0.837 |
| Affected Side (n, %) | 0.565 | ||
| Left | 20 (55.6) | 11 (37.9) | |
| Right | 16 (44.4) | 18 (62.1) | |
| Type of operation (n, %) | 0.053 | ||
| Bcs | 7 (16.7) | 9 (31) | |
| Rm | 29 (83.3) | 20 (69) | |
| Stage (n, %) | 0.146 | ||
| II | 7 (19.4) | 4 (13.8) | |
| III | 26 (72.2) | 20 (68.9) | |
| IV | 3 (8.4) | 5 (17.3) |
Comparison of setup errors of the two fixation methods in the chest wall target area and supraclavicular target area (mm,`x ± s)
| Group | Styrofoam | Bracket | t | P-value |
|---|---|---|---|---|
| CROI (X) | 1.59± 1.47 | 2.05 ± 1.64 | 2.516 | 0.012 |
| (Y) | 1.99 ± 1.46 | 2.10 ± 1.59 | 0.611 | 0.541 |
| (Z) | 1.78 ± 1.47 | 2.00 ± 1.58 | 1.235 | 0.218 |
| SROI (X) | 1.23 ± 0.88 | 1.32 ± 1.16 | 0.620 | 0.536 |
| (Y) | 1.23 ± 1.21 | 1.16 ± 1.17 | −0.445 | 0.657 |
| (Z) | 1.36 ± 1.27 | 1.75 ± 1.55 | 2.003 | 0.046 |
| CRTN (°) | 0.48 ± 0.46 | 0.53 ± 0.43 | 1.033 | 0.302 |
| SRTN (°) | 0.47 ± 0.47 | 0.66 ± 0.59 | 2.760 | 0.006 |