Table 4.
Median and interquartile range (Q1, Q3) of the volumetric difference of auto and manual contours in fractions violating and non-violating dose-constraints (V35Gy > 0.5cc) in the stomach, duodenum and bowel after replanning using precision (asPREC) and MIM (asMIM) autocontours.
| Structure | Method | Distance to PTV | VOL_DIFF (AUTO – MAN) [cc] | ||
|---|---|---|---|---|---|
| Do not violate(V35 < 0.5 cc) | Violate(V35 > 0.5 cc) | ρ | |||
| Stomach | asPREC | Ring 0 – 1.5 cm | 0.3 (-1.6, 2.0) | -10.9 (-13.6, -3.1) | .002 |
| Ring 1.5 – 3 cm | -1.9 (-7.2, 2.3) | -17.9 (-25.6, 3.4) | NS | ||
| asMIM | Ring 0 – 1.5 cm | 1.7 (-0.0, 6.2) | -6.2 (-10.2, 1.1) | <.001 | |
| Ring 1.5 – 3 cm | 1.0 (-4.2, 4.6) | -1.0 (-11.7, 8.1) | NS | ||
| Duodenum | asPREC | Ring 0 – 1.5 cm | 0.2 (-2.3, 2.8) | -2.9 (-6.1, -1.1) | .001 |
| Ring 1.5 – 3 cm | -0.1 (-5.6, 1.7) | 0.2 (-2.2, 4.8) | NS | ||
| asMIM | Ring 0 – 1.5 cm | 0.5 (-2.2, 2.7) | -3.0 (-7.4, 0.5) | .007 | |
| Ring 1.5 – 3 cm | -0.4 (-7.1, 2.1) | 0.3 (-6.7, 2.3) | NS | ||
| Bowel | asPREC | Ring 0 – 1.5 cm | 0.5 (-1.5, 6.4) | -7.8 (-11.9, -4.9) | <.001 |
| Ring 1.5 – 3 cm | 0.5 (-10.7, 8.2) | -6.0 (-10.1, -2.8) | NS | ||
| asMIM | Ring 0 – 1.5 cm | 1.0 (-0.8, 12.0) | -6.2 (-6.6, -3.4) | .017 | |
| Ring 1.5 – 3 cm | 6.6 (-3.7, 27.9) | 2.5 (1.3, 4.5) | NS | ||
Results are presented for the contour evaluated in the ring from 0 to 1.5 cm from the PTV vs. the ring from 1.5 to 3 cm from the PTV. Statistically not significant (NS) for p > 0.05.