Table 3.

Density difference along image profiles from Fig. 3. Values are the relative difference to kV CT in percent

	Profile 1	Profile 2	Profile 3
kV CBCT (TrueBeam)	$0.70\pm 1.38$	$0.71\pm 2.13$	$0.85\pm 3.32$
kV CBCT (Versa)	$4.86\pm 3.32$	$3.99\pm 6.61$	$8.05\pm 2.77$
MV CBCT (Artiste)	$0.80\pm 2.74$	$4.76\pm 6.83$	$0.06\pm 3.73$
MV CT (Tomo)	$3.30\pm 4.49$	$3.01\pm 4.69$	$3.40\pm 7.00$