Fig. 6From: Combined effect of dose gradient and rotational error on prescribed dose coverage for single isocenter multiple brain metastases in frameless stereotactic radiotherapyDifferential DVHs under 18 Gy for different dose gradients for 1-cm targets with an iso-radius 2.5 cm rotated three dimensionally by 2° (3Dr2.5rot2). Inset are the corresponding cumulative DVHs after 15 GyBack to article page