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Table 3 Gamma pass rate comparing IROC-measured film dose with institution reported planned AVE and 4D doses for lung and liver phantoms

From: Impact of planned dose reporting methods on Gamma pass rates for IROC lung and liver motion phantoms treated with pencil beam scanning protons

Phantom

Film plane

Gamma Index

Lung 7% 5 mm

Liver 7% 4 mm

Gamma Index

3% 3 mm

Criteria

AVE

4D

AVE

4D

Lung

Axial

≥80%

90%

95%

61%

64%

Coronal

≥80%

96%

99%

70%

78%

Sagittal

≥80%

89%

95%

65%

76%

Average over 3 plane

≥85%

92%

96%

65%

73%

Liver

Coronal

≥85%

99%

99%

68%

73%

Sagittal

≥85%

92%

94%

63%

66%

  1. Abbreviations: IROC the Imaging and Radiation Oncology Core, AVE average intensity, 4D 4-dimensional