Results of GTV Delineation Following Different Philosophies for Contour Definition: All Patients
| n | SUVmax | GTVvis | GTV2.5 | GTV40 | GTVbg | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 25 | 25 | 24 | 25 | 22 | |||||||||
| Volume (mL) | Radius* (cm) | Volume (mL) | Radius* (cm) | Volume (mL) | Radius* (cm) | Volume (mL) | Radius* (cm) | ||||||
| Mean | 17.1 | 157.7 | 3.03 | 164.6 | 3.05 | 53.6 | 2.18 | 94.7 | 2.52 | ||||
| Median | 17.2 | 107.8 | 2.95 | 108.3 | 2.96 | 41.4 | 2.15 | 62.2 | 2.45 | ||||
| Maximum | 38.8 | 666.2 | 5.42 | 655.7 | 5.39 | 168.3 | 3.42 | 318.0 | 4.23 | ||||
| Minimum | 1.7 | 9.3 | 1.30 | 8.1 | 1.24 | 5.7 | 1.11 | 3.7 | 0.96 | ||||
| t test vs. GTVvis | — | NS | NS | P = 0.0004 | P < 0.0001 | P = 0.0002 | P < 0.0001 | ||||||
| t test vs. GTV2.5 | — | — | P = 0.0007 | P < 0.0001 | P = 0.0006 | P < 0.0001 | |||||||
| t test vs. GTV40 | — | — | — | — | — | P = 0.01 | P = 0.006 | ||||||
↵* Radius values were calculated from volumes as spheric radii.