IMRT

movement in lung

Evaluation of different 4D planning concepts d J. W. H. W OLTHAUS et al .

Table 1. Systematic ( S ) and r and setup errors of P LR C Baseline variation 1.6 3. Setup 1.6 1. Margin (mm) 6.7 12. Data are derived from four-di tomography scans for the left–rig anterior–posterior (AP) directions margin when no respiratory motio Only setup errors and baseline var margin. Wolthaus et al

80%

70%

0 0.5 1 1.5 2 2.5 3 3.5

50%

60%

40%

90%

20%

30%

10%

Cranio-caudal [mm] 0%

0

-1

Seppenwoolde et al 2002

-2 Left-right [mm]

-3

-2 0 2 4 6 8 Anterior-posterior [mm]

Fig. 2. An example of a tumor trajectory showing hysteresis of the