2D and 3D x-ray phase retrieval of multi-material objects using a single defocus distance

Mario Alejandro Beltran, David Paganin, Kentaro Uesugi, Marcus John Kitchen

    Research output: Contribution to journalArticleResearchpeer-review

    Abstract

    A method of tomographic phase retrieval is developed for multi-material objects whose components each has a distinct complex refractive index. The phase-retrieval algorithm, based on the Transport-of-Intensity equation, utilizes propagation-based X-ray phase contrast images acquired at a single defocus distance for each tomographic projection. The method requires a priori knowledge of the complex refractive index for each material present in the sample, together with the total projected thickness of the object at each orientation. The requirement of only a single defocus distance per projection simplifies the experimental setup and imposes no additional dose compared to conventional tomography. The algorithm was implemented using phase contrast data acquired at the SPring-8 Synchrotron facility in Japan. The three-dimensional (3D) complex refractive index distribution of a multi-material test object was quantitatively reconstructed using a single X-ray phase-contrast image per projection. The technique is robust in the presence of noise, compared to conventional absorption based tomography. (C) 2010 Opitcal Society of America
    Original languageEnglish
    Pages (from-to)6423 - 6436
    Number of pages14
    JournalOptics Express
    Volume18
    Issue number7
    DOIs
    Publication statusPublished - 2010

    Cite this

    Beltran, Mario Alejandro ; Paganin, David ; Uesugi, Kentaro ; Kitchen, Marcus John. / 2D and 3D x-ray phase retrieval of multi-material objects using a single defocus distance. In: Optics Express. 2010 ; Vol. 18, No. 7. pp. 6423 - 6436.
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    abstract = "A method of tomographic phase retrieval is developed for multi-material objects whose components each has a distinct complex refractive index. The phase-retrieval algorithm, based on the Transport-of-Intensity equation, utilizes propagation-based X-ray phase contrast images acquired at a single defocus distance for each tomographic projection. The method requires a priori knowledge of the complex refractive index for each material present in the sample, together with the total projected thickness of the object at each orientation. The requirement of only a single defocus distance per projection simplifies the experimental setup and imposes no additional dose compared to conventional tomography. The algorithm was implemented using phase contrast data acquired at the SPring-8 Synchrotron facility in Japan. The three-dimensional (3D) complex refractive index distribution of a multi-material test object was quantitatively reconstructed using a single X-ray phase-contrast image per projection. The technique is robust in the presence of noise, compared to conventional absorption based tomography. (C) 2010 Opitcal Society of America",
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    2D and 3D x-ray phase retrieval of multi-material objects using a single defocus distance. / Beltran, Mario Alejandro; Paganin, David; Uesugi, Kentaro; Kitchen, Marcus John.

    In: Optics Express, Vol. 18, No. 7, 2010, p. 6423 - 6436.

    Research output: Contribution to journalArticleResearchpeer-review

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    AU - Beltran, Mario Alejandro

    AU - Paganin, David

    AU - Uesugi, Kentaro

    AU - Kitchen, Marcus John

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