Figure 2

Dosimetric comparison between patient 7 and patient 4. Sample static treatment plans for patients 7 (6 mm margin) and 4 (10 mm margin) are shown in a and b, respectively. The dosimetric effect of a 15 mm amplitude SI sinusoidal motion track is shown in c and d for patient 7 and 4, respectively. The corresponding target (thick lines) and PTV (thin lines) DVHs for these two cases are shown in e and f, both without motion (dashed lines) and with motion (solid lines).