900.12(e)(4)(ii): Semiannual quality control tests. Facilities with screen-film systems shall perform the following quality control tests at least semiannually:
(ii)Screen-film contact. Testing for screen-film contact shall be conducted using 40 mesh copper screen. All cassettes used in the facility for mammography shall be tested.
- What optical density (or range) should the facility use for the screen-film contact test and what is the criteria for determining pass or fail for a cassette?
- I have been following the ACR manual and have used an optical density range of 0.7-0.8 when doing my screen-film contact test. The film manufacturer recommends that I use a higher optical density. What should I use under the regulations?
- Must the screen-film contact and uniformity of screen speed tests be performed on new cassettes prior to clinical use and must the medical physicist perform the tests?