Mitigation of DMM-induced stripe patterns in synchrotron X-ray radiography through dynamic tilting

Autor: Mustapha Eddah, Henning Markötter, Björn Mieller, Michael Sintschuk, Jörg Beckmann, Giovanni Bruno
Jazyk: angličtina
Rok vydání: 2024
Předmět:
Zdroj: Journal of Synchrotron Radiation, Vol 31, Iss 6, Pp 1551-1560 (2024)
Druh dokumentu: article
ISSN: 1600-5775
16005775
DOI: 10.1107/S1600577524008646
Popis: In synchrotron X-ray radiography, achieving high image resolution and an optimal signal-to-noise ratio (SNR) is crucial for the subsequent accurate image analysis. Traditional methods often struggle to balance these two parameters, especially in situ applications where rapid data acquisition is essential to capture specific dynamic processes. For quantitative image data analysis, using monochromatic X-rays is essential. A double multilayer monochromator (DMM) is successfully used for this aim at the BAMline, BESSY II (Helmholtz Zentrum Berlin, Germany). However, such DMMs are prone to producing an unstable horizontal stripe pattern. Such an unstable pattern renders proper signal normalization difficult and thereby causes a reduction of the SNR. We introduce a novel approach to enhance SNR while preserving resolution: dynamic tilting of the DMM. By adjusting the orientation of the DMM during the acquisition of radiographic projections, we optimize the X-ray imaging quality, thereby enhancing the SNR. The corresponding shift of the projection during this movement is corrected in post-processing. The latter correction allows a good resolution to be preserved. This dynamic tilting technique enables the homogenization of the beam profile and thereby effectively reduces noise while maintaining high resolution. We demonstrate that data captured using this proposed technique can be seamlessly integrated into the existing radiographic data workflow, as it does not need hardware modifications to classical X-ray imaging beamline setups. This facilitates further image analysis and processing using established methods.
Databáze: Directory of Open Access Journals
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