TABLE I.
Institutional percentage pass rates for overall and individual criteria.
| Criteria | Overall passa | TLD pass | Gamma passb |
|---|---|---|---|
| 7% TLD, 7%/4 mm | 90 ± 2 | 93 ± 2 | 92 ± 2 |
| 5% TLD, 5%/4 mm | 77 ± 3 | 80 ± 3 | 86 ± 3 |
| 5% TLD, 5%/3 mm | 70 ± 4 | 80 ± 3 | 75 ± 3 |
| 4% TLD, 4%/4 mm | 63 ± 4 | 67 ± 4 | 79 ± 3 |
| 3% TLD, 3%/3 mm | 37 ± 4 | 49 ± 4 | 48 ± 4 |
a
Overall pass rate describes the ratio of institutions that passed both gamma index and TLD criteria, thus fulfilling the requirements for acceptance.
b
Gamma criterion requires ≥85% of pixels pass at the specified criteria.