Table 4.
Estimated dose uncertainties due to the finite grid size for dose calculations and measurements
| Collimator (mm) | Half of grid size (mm) | Dose gradient (Gy/mm) | Dose uncertainty (Gy) |
|---|---|---|---|
| 8 | 0.6 | 18.1 | 10.9 |
| 14 | 1.0 | 9.1 | 9.1 |
| 18 | 1.25 | 7.3 | 9.1 |
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.