TABLE V.
Attribute | 7% TLD, 7%/4 mm (%) | 5% TLD, 5%/4 mm (%) |
---|---|---|
Systematic | 11 (69) | 21 (58) |
Low | 9 (56) | 17 (47) |
High | 2 (13) | 4 (11) |
Setup/position | 2 (13) | 4 (11) |
Locala | 0 (0) | 8 (22) |
Globalb | 3 (19) | 3 (8) |
Local errors included tests in which local phenomena caused only one TLD to fail, typically by a small margin (∼1%).
Global errors were those that resulted from multiple errors or irregular dose distributions.