Figure 5
From: A margin-based analysis of the dosimetric impact of motion on step-and-shoot IMRT lung plans
The dosimetric effects of multi-fractionated treatments are shown with DVHs for the static plan (thick dashed line), the individual fractions (thin lines) and the cumulative dose (thick solid line). a shows five fractions with the same motion track (15 mm amplitude SI motion), but different starting phases per fraction. b and c show 7 and 30 fractions respectively, with each fraction experiencing a different, randomly selected, SI motion track.