Table 2.

Geometrical results presented as median value (range) of the differences between dCT and ReCT

Structure (number of patients)	Relative volume difference expressed as a percentage	CMS in cm	DSC expressed as a percentage
GTV-T (5)	23.5 (−10.8–69.0)	0.32 (0.13–0.88)	0.68 (0.54–0.78)
CTV-T (5)	−6,3 (−51.2–40.3)	0.49 (0.13–1.30)	0.80 (0.71–0.86)
GTV-N dxt (4)	23.8 (10.3–33.3)	0.27 (0.23–0.35)	0.74 (0.59–0.80)
CTV-N dxt (4)	11.0 (8.7–188.3)	0.21 (0.12–0.26)	0.88 (0.50–0.91)
GTV-N sin (4)	7.1 (−2.7–37.5)	0.33 (0.26–0.56)	0.54 (0.44–0.82)
CTV-N sin (4)	6.5 (−7.4–148.2)	0.37 (0.29–0.60)	0.80 (0.57–0.85)
Parotid dxt (7)	7.9 (−27.0–38.1)	0.22 (0.14–0.45)	0.78 (0.73–0.83)
Parotid sin (7)	−8.9 (−22.3–9.4)	0.24 (0.18–0.68)	0.81 (0.68–0.85)
Spinal cord (7)	−22.3 (−28.9–−7.9)	0.80 (0.25–1.31)	0.67 (0.64–0.73)

The relative volume difference is relative to the ReCT.