Table 3.
Central Point Displacement Results Summary.
| Location to Carina | Average Displacement, mm (SD) | Average Absolute Displacement, mm (SD) | Range, mm | %≥5mm | %≥10mm | |
|---|---|---|---|---|---|---|
| Inter-fraction | ||||||
| RL | Below | 1.8 (3.4) | 3.2 (2.0) | −5.2 to 8.3 | 19% | 0% |
| Above | 1.9 (4.6) | 4.2 (2.6) | −6.6 to 11.2 | 35% | 3% | |
| AP | Below | −0.2 (3.4) | 2.8 (2.0) | −7.1 to 6.5 | 19% | 0% |
| Above | 1.9 (6.6) | 3.9 (5.6) | −5.7 to 30.7 | 19% | 6% | |
| Intra-fraction | ||||||
| RL | Below | 2.4 (5.7) | 4.1 (4.6) | −5.2 to 23.5 | 26% | 6% |
| Above | 1.9 (6.2) | 3.6 (5.3) | −18.8 to 26.2 | 13% | 6% | |
| AP | Below | 0.6 (3.3) | 2.6 (2.1) | −4.5 to 10.7 | 6% | 3% |
| Above | 1.1 (5.1) | 2.8 (4.4) | −4.2 to 25.5 | 3% | 3% | |
The inter- and intra-fraction mean, average of the absolute value, and range of esophageal central point displacement in the RL (right-left) and AP (anterior-posterior) directions, above and beyond the carina is reported. The percent of displacements greater than or equal to 5mm and 10mm is included. A negative value represents motion to the patient’s right for the RL direction and anterior for the AP directions. SD = Standard Deviation