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Table 3 Results of the sensitivity analysis

From: A method for in vivo treatment verification of IMRT and VMAT based on electronic portal imaging device

Plan error type

H&N 1 (IMRT)

H&N 2 (IMRT)

Breast 1 (IMRT)

Breast 2 (VMAT)

Rectum 1 (VMAT)

Rectum 2 (VMAT)

MU increased by 1% (e1)

97.6

98.2

98.4

97.5

97.3

97.8

MU increased by 3% (e2)

95.7

96.4

93.4

91.5

89.7

87.3

MU increased by 5% (e3)

76.4

81.2

79.3

72.7

69.8

75.9

MU increased by 10% (e4)

62.5

58.4

69.4

52.4

57.6

48.7

MU decreased by 5% (e5)

81.5

77.3

68.4

69.1

74.1

73.7

Offset by 5 mm toward right (e6)

98.2

97.6

98.2

96.5

94.8

96.1

Offset by 10 mm toward right (e7)

97.5

98.1

99.1

96.3

98.3

95.3

Offset by 20 mm toward right (e8)

93.4

92.5

94.7

91.3

92.4

94.8

Offset by 5 mm toward anterior (e9)

98.1

100

99.5

98.8

98.4

97.1

Offset by 10 mm toward anterior (e10)

97.9

98.8

97.8

96.7

95.2

94.9

Offset by 20 mm toward anterior (e11)

98.5

99.2

98.5

97.1

98.3

96.4

MLC leaves opened by 5 mm (e12)

48.2

54.5

39.1

29.8

37.2

19.7

MLC leaves shifted in same direction by 5 mm (e13)

79.8

68.5

59.4

64.4

56.9

70.1

MLC leaves of bank B within the field shifted by 5 mm (e14)

56.4

49.7

43.6

38.4

27.9

40.6

MLC leaves of central four leaf-pairs opened by 10 mm (e15)

76.9

80.7

84.1

79.3

73.4

69.5

Gantry angle offset by + 5

96.3

94.2

94.7

   

Gantry angle offset by + 10

82.6

86.9

79.4