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Table 4 3D gamma (γ%) values resulted from the comparison of planned and reconstructed dose distribution in 6 planning target volumes (PTVs) and two external (body) from the two plans (upper body and lower body) of every TMI/TMLI patients. 3Dγ values of 3%@3mm from the original plans were obtained with different pitch and modulation factor listed in Table 1, whereas 3Dγ values of 3%@3mm with pich modified to 0.43 from the original plans were also shown here. The 3Dγ values with 2%@2mm from another set of new plans of the same patients with fixed pitch of 0.3 and modulation factor of 3 showed significant improvement in the 3Dγ values 

From: Leaf open time sinogram (LOTS): a novel approach for patient specific quality assurance of total marrow irradiation

Treatment plan

Target (PTV)

3Dγ (3%@3mm) from original plans

3Dγ (3%@3mm) from new plans with field width = 5 cm; pitch = 0.43 and modulation factor = same as original plans

3Dγ (2%@2mm) from new plans with field width = 5 cm; pitch = 0.3 and modulation Factor = 3

P11

P12

P13

P14

P15

P11

P12

P13

P14

P15

P11

P12

P13

P14

P15

HFS

Brain

90

83

97

97

93

72

96

95

92

99

100

94

97

97

100

Chest

75

28

86

94

41

53

57

68

63

60

100

99

94

100

100

Torso

83

52

94

93

24

60

68

82

51

46

100

98

100

100

100

Limb

85

34

73

55

57

82

50

55

51

44

100

95

97

100

100

Upper body

86

50

91

87

52

67

69

78

63

63

100

97

97

98

100

External upper body

94

68

95

88

75

87

79

88

82

77

100

99

99

100

100

FFS

Lower body

100

100

100

100

100

          

External lower body

100

100

100

100

100