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- W2017040836 abstract "The effectiveness of film–screen mammography is limited by tradeoffs between latitude and contrast, film granularity, and the need to increase dose when antiscatter methods are used. We are currently developing a scanned‐projection digital mammography (SPDM) system to overcome these limitations. The system consists of a pair of scanning slits, a high‐resolution x‐ray image intensifier tube, a linear photodiode array, and a digital display. The detective quantum efficiency of the SPDM system at spatial frequencies up to 3 cycles/mm is similar to that of mammographic film–screen combinations, but is lower at high frequencies. For low‐contrast objects as small as 0.1 mm in diameter, the signal‐to‐noise ratio is currently equal to that of optimally exposed mammographic film–screen images for equal dose to the breast and superior for regions which would be underexposed or overexposed on film. This is achieved by the use of a low‐noise detector system, geometric magnification, and scatter elimination. Images of a contrast‐detail phantom and excised breast tissue illustrate the superior contrast sensitivity of SPDM." @default.
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- W2017040836 date "1987-09-01" @default.
- W2017040836 modified "2023-10-14" @default.
- W2017040836 title "Scanned-projection digital mammography" @default.
- W2017040836 doi "https://doi.org/10.1118/1.596147" @default.
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