Abstract
The technology of phase-contrast mammography is described from its principle through application to digital mammography. An edge effect due to phase contrast has been formulated with geometric optics for phase-contrast imaging with use of current medical x-ray tubes. The spatial resolution in digital mammography is discussed for design of a phasecontrast digital mammography system. Our empirical study of increase in image-sharpness due to magnification and phasecontrast is reported for each full-field and spot-compression mammography using phase-contrast technology. And experimental results of image noise are also reported in terms of noise power spectra(NPS)for conventional contact and phase-contrast images.
