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U.S. Department of Health and Human Services

Radiation-Emitting Products

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Screen Film Contact - Semiannual Quality Control Tests

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Citation:

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.

Questions:
  1. 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?
  2. 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?
  3. 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?