Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
Institutional gamma percentage pass rates for increasing percentage of pixels required for acceptance.
| Criteria | ≥85% | ≥90% | ≥95% |
|---|---|---|---|
| 7%/4 mm | 92 ± 2 | 90 ± 2 | 82 ± 3 |
| 5%/4 mm | 86 ± 3 | 79 ± 3 | 58 ± 4 |
| 5%/3 mm | 75 ± 3 | 62 ± 4 | 39 ± 4 |
| 4%/4 mm | 79 ± 3 | 62 ± 4 | 42 ± 4 |
| 3%/3 mm | 48 ± 4 | 28 ± 4 | 10 ± 2 |
