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Table 3 Summary of parameters linked to the efficiency of the delivery process. Data are reported as mean value and standard deviation averaging over the three planning cases and/or the 17 modulated beams. Data refer to AAA dose calculation algorithm and 2.5 mm dose grid.

From: What is an acceptably smoothed fluence? Dosimetric and delivery considerations for dynamic sliding window IMRT

 

s25

s50

s80

s25–s80

p

MU/Gy

558 ± 101

463 ± 45

375 ± 41

-33%

0.04

MLC average aperture [cm]

1.3 ± 0.3

1.6 ± 0.4

1.9 ± 0.6

+39%

0.004

Modulation Index MI

20.5 ± 3.2

18.2 ± 3.5

15.1 ± 2.2

-26%

0.006