Table 4 Factors influencing the error of four-dimensional cone beam computed tomography bone- based registration and grayscale + manual registration
From: Application of four-dimensional cone beam computed tomography in lung cancer radiotherapy
Small error group (N = 39) | Large error group (N = 28) | P | |
|---|---|---|---|
Average volume (mL) | 43.30 (0.44–285.34) | 40.98 (1.28–164.47) | > 0.05 |
Tumor Motion (cm) | 0.74 (0.00–2.40) | 1.03 (0.17–2.38) | 0.044 |
Motion ≤ 0.5 cm (N = 21) | 17 (43.5%) | 4 (14.2%) | - |
Motion > 0.5 cm (N = 46) | 22 (56.5%) | 24 (85.8%) | 0.032 |
Body mass index | 24.19 (15.85–20.05) | 25.63 (22.49–32.53) | > 0.05 |