When evaluating the quality and performance of a mammography grid, it is difficult to perform a quantitative analysis. As a general method, the first step is to measure and compare the difference in film density (or detector exposure) across the entire area. The second step is to check the x-ray quality with a mammography phantom of 4.2cm thickness which is made of poly(methyl methacrylate), also known as PMMA. The material is a close match to the adipose tissue and glands in the breast. The film density is standardized to 1.0 when x-raying. There are 16 patterns in the phantom for image evaluation. The standard criteria for acceptable is generally over 10 of these patterns can be identified.

1. 1.56 mm nylon fiber
2. 1.12 mm nylon fiber
3. 0.89 mm nylon fiber
4. 0.75 mm nylon fiber
5. 0.54 mm nylon fiber
6. 0.40 mm nylon fiber
7. 0.54 mm speccks
8. 0.40 mm specks
9. 0.32 mm specks
10. 0.24 mm specks
11. 0.16 mm specks
12. 2.00 mm tumor-like mass
13. 1.00 mm tumor-like mass
14. 0.75 mm tumor-like mass
15. 0.50 mm tumor-like mass
16. 0.25 mm tumor-like mass