Figure 4From: A dosimetric phantom study of dose accuracy and build-up effects using IMRT and RapidArc in stereotactic irradiation of lung tumoursMeasured dose distributions of 2 mm (A) and 15 mm (B) SWAs were subtracted from the corresponding open field measurement of 2.5 × 2.5 cm2(C and D). Films were perpendicular to the beam axis in the middle of the Ø1.5 cm tumour.Back to article page