Table 2.

Comparison using PDD values between the results of DiDIT and SWIFTER, for the 5 mm, 3 mm, and 0 mm margin plans, respectively.

Percent dose difference (PDD)	5 mm margin	3 mm margin	0 mm margin
Average PDD (%)	0.2	0.4	0.4
Maximum PDD (%)	1.1	2.2	5.2
Standard deviation (%)	0.2	0.3	0.5
% of voxels with PDD < 4%	100	100	99.9
% of voxels with PDD < 3%	100	100	99.7
% of voxels with PDD < 2%	100	999	98.5