Investigation of image characteristics in phase-contrast X-Ray imaging (PCXI)) using a conventional X-Ray grid

• Published in: Journal of the Korean Physical Society Vol. 71; no. 10; pp. 722 - 726
• Main Authors: Lim, Hyunwoo, Lee, Hunwoo, Cho, Hyosung, Seo, Changwoo, Je, Uikyu, Park, Chulkyu, Kim, Kyuseok, Kim, Guna, Park, Soyoung, Lee, Dongyeon, Kang, Seokyoon, Lee, Minsik
• Format: Journal Article
• Language: English
• Published: Seoul The Korean Physical Society 01.11.2017; Springer Nature B.V; 한국물리학회
• Subjects: Absorption; CMOS; Fourier analysis; Image contrast; Image enhancement; Mathematical and Computational Physics; Particle and Nuclear Physics; Physics; Physics and Astronomy; Studies; Theoretical; Visibility; X ray tubes; X-rays; 물리학; Microfocus x-ray tube; Dark-field image; Phase-contrast x-ray image; X-ray grid
• ISSN: 0374-4884; 1976-8524
• DOI: 10.3938/jkps.71.722

Phase-contrast x-ray imaging (PCXI) is an emerging technology which allows for imaging of smaller features in the examined sample than conventional attenuation-based x-ray imaging with lower x-ray dose. In this work, we investigated a relatively simple approach to PCXI using a conventional x-ray grid, which has potential to open the way to further widespread use of the technique into many application fields. We performed a simulation using a useful PCXI software developed in our previous study to investigate the image characteristics. We also performed a preliminary experiment for PCXI using a table-top setup which consists of a focused-linear xray grid having a 200-lines/in strip density, a microfocus x-ray tube having a 55- μ m focal spot, and a CMOS-type flat-panel detector having a 49- μ m pixel resolution. We successfully extracted absorption, dark-field, and phase-contrast x-ray images of much enhanced visibility at a time from the raw image of the sample by Fourier analysis. Further, we made a composite image by combining the absorption image with the colored dark-field image and compared its image characteristic to that of the absorption image alone.