Dose Course 2018_Flipping book

Accuracy: Distance Map Voxel Size

• Predefined (usually for each VOI type i.e. target or OAR etc.) • Automatic Voxel Size to achieve both reasonable accuracy and speed • This can have an affect on the volume accuracy of the DVH

Cubes centered at origin

1.1

15 cm 0.25 cm 1 cm 0.5 cm

1.0

0.9

0.8

5 cm 4 cm 2 cm 3 cm

(cm^3)

0.7

0.6 Calculated Volume

Total Volume normalised to

0.5

0

0.5

1

1.5

2

Voxel Size (cm)

From Paul Kinsella St Luke’s

Dublin 2018