Film/Screen contact can have a significant influence on image quality. Todays mammography film/screen systems have higher resolution than diagnostic radiography x-ray systems and require test tools with finer detail.
Regular testing with the Gammex 157A detects problems and artifacts early.
Use of the tool and the evaluation of the resulting images is simple. Areas of poor screen contact appear darker than areas of good contact. Any dark areas greater than 1 cm should be investigated and corrective action taken.