Simple test pattern for mammographic screen-film contact measurement.
Test patterns to measure mammographic screen-film contact require the use of a much finer screen-wire mesh than can be used in test patterns for other diagnostic cassettes. The author has found that a radiographic grid of any line spacing equal to or exceeding 40 lines per inch can be used to test mammographic screen-film contact, making it unnecessary to purchase a special dedicated fine-mesh mammographic test pattern. However, the use of a magnification technique will often be required, since modern grids have mesh frequencies in excess of 100 lines per inch.
Tanner
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Department of Radiology, University of Tennessee, Memphis 38168.
D005260:Female; D006801:Humans; D008327:Mammography / Q000592:standards*; D011786:Quality Control; D013679:Technology, Radiologic; D014963:X-Ray Intensifying Screens / Q000592:standards*