Table 2 Gross tumor volumes at different fractions of radiotherapy

Mean GTV (cm³)

145.1 ± 159.8

139.5 ± 148.9

131.2 ± 140.2

122.9 ± 127.4

117.9 ± 122.2

Median GTV (cm³)

76.5 (10.4–587.2)

73.7 (10.3–501.34)

71.5 (11.2–503)

69.5 (9.5–475.8)

66.1 (10.3–468.1)

Median relative GTV volume

1.0

0.979 (0.854–1.108)

0.938 (0.775–1.077)

0.894 (0.658–1.057)

0.889 (0.560–1.029)

Relative GTV Reduction

0

2.1%(−10.8–14.6%)

6.2%(−7.7–22.5%)

10.6%(−5.7–34.2%)

11.1%(−2.9–44%)