On the optimisation of the geometric pattern for structured illumination based X-ray phase contrast and dark field imaging: A simulation study and its experimental validation
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| Main Authors: | , , , , , |
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| Format: | Preprint |
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2025
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| _version_ | 1866910911683362816 |
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| author | Magnin, Clara Quenot, Laurene Cenda, Dan Mihai Lantz, Blandine Faure, Bertrand Brun, Emmanuel |
| author_facet | Magnin, Clara Quenot, Laurene Cenda, Dan Mihai Lantz, Blandine Faure, Bertrand Brun, Emmanuel |
| contents | Phase-contrast and dark-field imaging are relatively new X-ray imaging modalities that provide additional information to conventional attenuation-based imaging. However, this new information comes at the price of a more complex acquisition scheme and optical components. Among the different techniques available, such as Grating Interferometry or Edge Illumination, modulation-based and more generally single-mask/grid imaging techniques simplify these new procedures to obtain phase and dark-field images by shifting the experimental complexity to the numerical post-processing side. This family of techniques involves inserting a membrane into the X-ray beam that locally modulating the intensity to create a pattern on the detector which serves as a reference.
However, the topological nature of the mask used seems to determine the quality of the reconstructed phase and dark-field images. We present in this article an in-depth study of the impact of the membrane parameters used in a single mask imaging approach. A spiral topology seems to be an optimum both in terms of resolution and contrast-to-noise ratio compared to random and regular patterns. |
| format | Preprint |
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arxiv_https___arxiv_org_abs_2504_10665 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | On the optimisation of the geometric pattern for structured illumination based X-ray phase contrast and dark field imaging: A simulation study and its experimental validation Magnin, Clara Quenot, Laurene Cenda, Dan Mihai Lantz, Blandine Faure, Bertrand Brun, Emmanuel Optics Medical Physics Phase-contrast and dark-field imaging are relatively new X-ray imaging modalities that provide additional information to conventional attenuation-based imaging. However, this new information comes at the price of a more complex acquisition scheme and optical components. Among the different techniques available, such as Grating Interferometry or Edge Illumination, modulation-based and more generally single-mask/grid imaging techniques simplify these new procedures to obtain phase and dark-field images by shifting the experimental complexity to the numerical post-processing side. This family of techniques involves inserting a membrane into the X-ray beam that locally modulating the intensity to create a pattern on the detector which serves as a reference. However, the topological nature of the mask used seems to determine the quality of the reconstructed phase and dark-field images. We present in this article an in-depth study of the impact of the membrane parameters used in a single mask imaging approach. A spiral topology seems to be an optimum both in terms of resolution and contrast-to-noise ratio compared to random and regular patterns. |
| title | On the optimisation of the geometric pattern for structured illumination based X-ray phase contrast and dark field imaging: A simulation study and its experimental validation |
| topic | Optics Medical Physics |
| url | https://arxiv.org/abs/2504.10665 |