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Table 3 Results of treatment site-specific lower control limits

From: Investigation of a real-time EPID-based patient dose monitoring safety system using site-specific control limits

Treatment type Treatment site Number of plans or patients Number of fields Average cumulative χ pass-rate (%) (μ) Lower control limit (%) (μ-3σ)
IMRT Prostate 82 1055 89.1 75.6
IMRT Head and Neck 37 486 84.0 71.3
IMRT Rectum 18 259 80.9 71.1