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.
The image quality criteria and the score scale defined to evaluate the quality of images.
| Score Criterion |
1 | 2 | 3 | 4 |
|---|---|---|---|---|
| IVC visibility | Not visible | Poorly visible | Visible | Very well visible |
| AA visibility | Not visible | Poorly visible | Visible | Very well visible |
| Background (BG) artifact | Extensive artifact | Moderate artifact | Minimal artifact | No artifact |
The image quality was graded visually. A higher score corresponds to better image quality and vice versa.
