Reduced-dose magnification mammography.

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Abstract
A new reduced-dose magnification mammography system which uses a microfocal-spot/tungsten-target X-ray tube in conjunction with a high-speed, rare-earth film/screen system is described. Physical measurements of imaging parameters, phantom tests and limited clinical trials are reported. Although this system is not yet ready for general use, preliminary results show that diagnostic magnification images of breast masses and microcalcifications are feasible with low radiation doses.