Improved tool for testing screen-film contact in mammography.
Good screen-film contact is essential to obtain high definition in radiographic images. We compared the conventional test tool for measuring screen-film contact, which uses #8 mesh (eight wires per inch [about three wires per centimeter]), with a prototype tool of #40 copper mesh. The conventional tool did not adequately test screen-film contact for mammography, in which significantly higher resolution is obtained. We believe #40 copper mesh should be used to test screen-film contact of mammographic cassettes. We also found that entrapped air may reduce screen-film contact and, therefore, recommend that cassettes be loaded at least 15 minutes before they are exposed.
Mount
C J
CJ
Department of Diagnostic Radiology, Mayo Clinic, Rochester, MN 55905.
Gray
J E
JE
D008327:Mammography / Q000295:instrumentation* / Q000379:methods; D014963:X-Ray Intensifying Screens