| 100 kV | Mono_E 55 keV | Mono+ 55 keV |
Normal esophageal display | 4.02 ± 0.52 | 2.75 ± 0.55 | 4.47 ± 0.54 |
Tumor contour display | 3.89 ± 0.22 | 2.68 ± 0.52 | 4.57 ± 0.52 |
Imaging quality | 3.65 ± 0.33 | 2.70 ± 0.53 | 4.28 ± 0.41 |