Dose 2016

Sampling

Random Sampling

Grid Sampling

- DVH can be constructed from set of randomly distributed dose points in the VOI - Sample fewer voxels to get equivalent accuracy

• The true volume can be

approximated by the ratio of number of points falling inside relative to outside

N V

N VV =

=

N V

0 .

0

0

N

0

Utrecht 2016 OMP – all dose voxels sampled Eclipse – Grid and interpolation ERGO++ - random sampling

Med Phys 1990