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.
Ratio of maximum absorption of the top half to the maximum absorption of the bottom half , R, calculated for phantoms of 2 cm diam, reconstructed without (w/o) and with (w) using depth correction.
| Phantom type | TL | HH | HL | TH | ||||
|---|---|---|---|---|---|---|---|---|
| Expected R | 0.5 |
1.0 |
1.0 |
2.0 |
||||
| Depth (cm) | w/o | w | w/o | w | w/o | w | w/o | w |
| 1.5 | 1.34 | 0.77 | 1.36 | 0.98 | 1.64 | 1.02 | 2.14 | 1.27 |
| 2.0 | 1.53 | 0.83 | 2.25 | 1 | 2.47 | 1.14 | 2.05 | 1.38 |
| 2.5 | 2.58 | 0.8 | 2.57 | 0.99 | 2.79 | 1.12 | 3.63 | 2.27 |
| 3.0 | 4.81 | 3.66 | 2.48 | 1.18 | 2.89 | 0.93 | 9.67 | 4.7 |
