2 November 2000 Characterization of pre- and postpatient x-ray polycapillary optics for mammographic imaging
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Polycapillary x-ray optics can be used as pre- or post-patient optics to design mammographic imaging systems with higher resolution, greater contrast, and a lower absorbed patient dose. A multi-fiber collimating prototype optic, used as pre-patient beam shaper, provides 39% transmission efficiency at 17.5 keV, good uniformity, and only 3.9 mrad divergence. Experimental optics characterization results are compared with detailed computer simulations including analysis of optical defects such as channel waviness and bending. The collimating optic was used to produce monochromatic radiation by diffracting from a silicon crystal. The monochromatic contrast, measured at 8 keV with a polypropylene phantom, was 5 times greater than the measured polychromatic contrast.
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Francisca R. Sugiro, Sushil D. Padiyar, Carolyn A. MacDonald, "Characterization of pre- and postpatient x-ray polycapillary optics for mammographic imaging", Proc. SPIE 4144, Advances in Laboratory-based X-Ray Sources and Optics, (2 November 2000); doi: 10.1117/12.405894; https://doi.org/10.1117/12.405894

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