• Title/Summary/Keyword: X-Ray scattering

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Experimental Study for Phase-contrast X-ray Imaging Based on a Single Antiscatter Grid and a Polychromatic X-ray Source (단일 비산란 그리드 및 다색광 x-선원 기반 위상대조 x-선 영상화 실험 연구)

  • Park, Yeonok;Cho, Hyosung;Lim, Hyunwoo;Je, Uikyu;Park, Chulkyu;Cho, Heemoon;Kim, Kyuseok;Kim, Guna;Park, Soyoung
    • Progress in Medical Physics
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    • v.26 no.4
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    • pp.215-222
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    • 2015

  • In this work, we performed a proof-of-concept experiment for phase-contrast x-ray imaging (PCXI) based on a single antiscatter grid and a polychromatic x-ray source. We established a table-top setup which consists of a focused-linear grid having a strip density of 200 lines/inch, a microfocus x-ray tube having a focal-spot size of about $5{\mu}m$, and a CMOS-type flat-panel detector having a pixel size of $48{\mu}m$. By using our prototype PCXI system and the Fourier demodulation technique, we successfully obtained attenuation, scattering, and differential phase-contrast images of improved visibility from the raw images of several selected samples at x-ray tube conditions of $90kV_p$ and 0.1 mAs. Further, fusion image (e.g., the attenuation+the scattering) may have an advantage in displaying details of the sample's structures that are not clearly visible in the conventional attenuation image. Our experimental results indicate that single-grid-based approach seems a useful method for PCXI with great simplicity and minimal requirements on the setup alignment.

  • https://doi.org/10.14316/pmp.2015.26.4.215 인용 PDF KSCI