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Table 3 Log failure rates with various tolerances applied

From: A multi-institution evaluation of MLC log files and performance in IMRT delivery

  Leaf RMS error 95th percentile error
Tolerance (mm) 0.5 1.0 1.5 2.0 3.5 0.5 1.0 1.5 2.0 3.5
  Log failure %  
Step & shoot 0 0 0 0 0 0 0 0 0 0
Dynamic 14.02 0.12 0.06 0.03 0 67.98 8.16 0.13 0.06 0.05
VMAT 49.30 0 0 0 0 85.75 61.44 0 0 0
  1. Failure percentages of the data presented in this study for various proposed thresholds of the two metrics in TG-142 for Varian machines. The current TG-142 thresholds of 3.5 mm are shown for comparison.