乳腺摄影Mammography
高分卡High resolution test pattern
高分卡High resolution test pattern（leeds公司）These test patterns are designed for quick quantitative assessments of the limiting spatial resolution of an x-ray system. The line pair patterns consist of a thin foil of Lead sandwiched between plastic plates. In the foil, linear slits are cut with a range of widths, these alternate with linear bars of the foil of equal width. One slit and one bar is referred to as a line pair, and the width of each group of lines is specified in terms of the number of line pairs per mm (LP/mm).
详情请点击：
http://www.leedstestobjects.com/index.php/phantom/resolution-test-patterns/
