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1234567812345678SegmentPlannedDetected76.2355.8935.9215.8514.2534.0054.0274.0976.0056.0036.0016.0014.0034.0054.0074.00Segment No.Planned−73.00−53.50−34.50−15.00−15.00−35.50−57.00−76.50Table 4　Detected and planned jaw positions with artificial errors at gantry 0 degreesFigure 4　Analysis of the multileaf collimator (MLC) picket fence (PF) test with Pylinac PF module. a-1) PF test without artificial error; a-2) error histogram of PF test without artificial error; b-1) PF test with artificial error; b-2) error histogram of PF test with artificial error. The vertical line in each error histogram shows a 0.5 mm leaf tolerance value.Gantry 0 degreesDetectedSDDiff0.20−0.230.110.230.080.150.320.150.09−0.250.020.000.17−0.020.04−0.0976.0355.8736.0815.7814.0933.8353.8673.90X1 jaw position (mm)Detected−73.19−53.56−34.55−15.26−15.22−35.74−57.06−76.51SD0.160.020.130.050.150.140.150.08Table 3　Planned and detected jaw positions of X2 jaw (mm)Gantry 270 degreesGantry 90 degreesSDDiff0.07−0.030.070.130.22−0.080.210.220.17−0.090.170.230.250.140.100.14Diff: Planned-Detected; SD: Standard deviation; X2: right-sided jaw.DetectedPlanned75.0056.5037.0015.5015.0033.5053.0074.50Diff: Planned-Detected; SD: Standard deviation; X1: left-sided jaw; X2: right-sided jaw.Diff0.190.060.050.260.220.240.060.01SDDiff0.01−0.040.010.04−0.190.10.170.020.12−0.010.11−0.080.140.020.070.1676.0455.9936.1915.9814.0134.0853.9873.93X2 jaw position (mm)Detected75.1256.3936.6215.3714.8333.5252.9474.48Gantry rotationDetectedDiffSD0.280.240.45−0.090.170.230.020.120.230.240.100.20.190.040.110.1975.7256.0935.8315.8813.7733.9053.9673.89SD0.190.110.170.150.270.080.050.10Diff−0.120.110.380.130.17−0.020.060.02595