Table 2.
Total coincidence events of different distances for phantoms.
| 50 mm | 70 mm | 100 mm | |
|---|---|---|---|
| Point phantom | 3.4 × 105 | 2.2 × 105 | 1.3 × 105 |
| Hot spot phantom | 2.4 × 107 | 1.4 × 107 | 8.9 × 106 |
| Derenzo phantom | 1.0 × 107 | 6.8 × 106 | 4.2 × 106 |
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.