X-ray phase-contrast imaging using cascade Talbot-Lau interferometers

Ji Li; Jianheng Huang; Yaohu Lei; Xin Liu; Zhigang Zhao

doi:10.1117/12.2506502

15 November 2018 X-ray phase-contrast imaging using cascade Talbot-Lau interferometers

Ji Li, Jianheng Huang, Yaohu Lei, Xin Liu, Zhigang Zhao

Proceedings Volume 10964, Tenth International Conference on Information Optics and Photonics; 1096469 (2018) https://doi.org/10.1117/12.2506502
Event: Tenth International Conference on Information Optics and Photonics (CIOP 2018), 2018, Beijing, China

Abstract

Grating-based X-ray phase-contrast imaging (XPCI), have shown great potential for biological and medical imaging applications. However, the fabrication of the absorption grating, an indispensable element in conventional Talbot-Lau interferometer (TLI), making it a great challenge to this technology into practical use. In this paper, we implemented a cascade TLI (CTLI) for XPCI composed by a TLI and an inverse TLI, the self-image of TLI being used as the source of the inverse TLI, with the purpose to avoid the fabrication of small-period high aspect-ratio absorption gratings. Experiments validated the method and demonstrated the versatility and tunability of the system. The angular sensitivity as a function of the sample position was measured and discussed. Results show that the highest sensitivity is obtained, when the investigated object is close to any of two phase gratings. Furthermore, a CTLI with interference fringes being magnified to be directly detected by a common large-area detector would be established using this method. This will be useful for designing an XPCI system for applications of biomedical imaging in large field of view.

Citation Download Citation

Ji Li, Jianheng Huang, Yaohu Lei, Xin Liu, and Zhigang Zhao "X-ray phase-contrast imaging using cascade Talbot-Lau interferometers", Proc. SPIE 10964, Tenth International Conference on Information Optics and Photonics, 1096469 (15 November 2018); https://doi.org/10.1117/12.2506502

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