Cycloidal-spiral sampling for three-modal x-ray CT flyscans with two-dimensional phase sensitivity
Abstract We present a flyscan compatible acquisition scheme for three-modal X-Ray Computed Tomography (CT) with two-dimensional phase sensitivity. Our approach is demonstrated using a “beam tracking” setup, through which a sample’s attenuation, phase (refraction) and scattering properties can be mea...
| Main Authors: | , , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Nature Portfolio
2022-12-01
|
| Series: | Scientific Reports |
| Online Access: | https://doi.org/10.1038/s41598-022-25999-1 |
| _version_ | 1811189037469270016 |
|---|---|
| author | G. Lioliou O. Roche i Morgó S. Marathe K. Wanelik S. Cipiccia A. Olivo C. K. Hagen |
| author_facet | G. Lioliou O. Roche i Morgó S. Marathe K. Wanelik S. Cipiccia A. Olivo C. K. Hagen |
| author_sort | G. Lioliou |
| collection | DOAJ |
| description | Abstract We present a flyscan compatible acquisition scheme for three-modal X-Ray Computed Tomography (CT) with two-dimensional phase sensitivity. Our approach is demonstrated using a “beam tracking” setup, through which a sample’s attenuation, phase (refraction) and scattering properties can be measured from a single frame, providing three complementary contrast channels. Up to now, such setups required the sample to be stepped at each rotation angle to sample signals at an adequate rate, to prevent resolution losses, anisotropic resolution, and under-sampling artefacts. However, the need for stepping necessitated a step-and-shoot implementation, which is affected by motors’ overheads and increases the total scan time. By contrast, our proposed scheme, by which continuous horizontal and vertical translations of the sample are integrated with its rotation (leading to a “cycloidal-spiral” trajectory), is fully compatible with continuous scanning (flyscans). This leads to greatly reduced scan times while largely preserving image quality and isotropic resolution. |
| first_indexed | 2024-04-11T14:28:10Z |
| format | Article |
| id | doaj.art-c76ae4a665e3478bb1e2b78b975ea2ef |
| institution | Directory Open Access Journal |
| issn | 2045-2322 |
| language | English |
| last_indexed | 2024-04-11T14:28:10Z |
| publishDate | 2022-12-01 |
| publisher | Nature Portfolio |
| record_format | Article |
| series | Scientific Reports |
| spelling | doaj.art-c76ae4a665e3478bb1e2b78b975ea2ef2022-12-22T04:18:47ZengNature PortfolioScientific Reports2045-23222022-12-011211910.1038/s41598-022-25999-1Cycloidal-spiral sampling for three-modal x-ray CT flyscans with two-dimensional phase sensitivityG. Lioliou0O. Roche i Morgó1S. Marathe2K. Wanelik3S. Cipiccia4A. Olivo5C. K. Hagen6Department of Medical Physics and Biomedical Engineering, University College LondonDepartment of Medical Physics and Biomedical Engineering, University College LondonDiamond Light Source, Harwell Science and Innovation CampusDiamond Light Source, Harwell Science and Innovation CampusDepartment of Medical Physics and Biomedical Engineering, University College LondonDepartment of Medical Physics and Biomedical Engineering, University College LondonDepartment of Medical Physics and Biomedical Engineering, University College LondonAbstract We present a flyscan compatible acquisition scheme for three-modal X-Ray Computed Tomography (CT) with two-dimensional phase sensitivity. Our approach is demonstrated using a “beam tracking” setup, through which a sample’s attenuation, phase (refraction) and scattering properties can be measured from a single frame, providing three complementary contrast channels. Up to now, such setups required the sample to be stepped at each rotation angle to sample signals at an adequate rate, to prevent resolution losses, anisotropic resolution, and under-sampling artefacts. However, the need for stepping necessitated a step-and-shoot implementation, which is affected by motors’ overheads and increases the total scan time. By contrast, our proposed scheme, by which continuous horizontal and vertical translations of the sample are integrated with its rotation (leading to a “cycloidal-spiral” trajectory), is fully compatible with continuous scanning (flyscans). This leads to greatly reduced scan times while largely preserving image quality and isotropic resolution.https://doi.org/10.1038/s41598-022-25999-1 |
| spellingShingle | G. Lioliou O. Roche i Morgó S. Marathe K. Wanelik S. Cipiccia A. Olivo C. K. Hagen Cycloidal-spiral sampling for three-modal x-ray CT flyscans with two-dimensional phase sensitivity Scientific Reports |
| title | Cycloidal-spiral sampling for three-modal x-ray CT flyscans with two-dimensional phase sensitivity |
| title_full | Cycloidal-spiral sampling for three-modal x-ray CT flyscans with two-dimensional phase sensitivity |
| title_fullStr | Cycloidal-spiral sampling for three-modal x-ray CT flyscans with two-dimensional phase sensitivity |
| title_full_unstemmed | Cycloidal-spiral sampling for three-modal x-ray CT flyscans with two-dimensional phase sensitivity |
| title_short | Cycloidal-spiral sampling for three-modal x-ray CT flyscans with two-dimensional phase sensitivity |
| title_sort | cycloidal spiral sampling for three modal x ray ct flyscans with two dimensional phase sensitivity |
| url | https://doi.org/10.1038/s41598-022-25999-1 |
| work_keys_str_mv | AT glioliou cycloidalspiralsamplingforthreemodalxrayctflyscanswithtwodimensionalphasesensitivity AT orocheimorgo cycloidalspiralsamplingforthreemodalxrayctflyscanswithtwodimensionalphasesensitivity AT smarathe cycloidalspiralsamplingforthreemodalxrayctflyscanswithtwodimensionalphasesensitivity AT kwanelik cycloidalspiralsamplingforthreemodalxrayctflyscanswithtwodimensionalphasesensitivity AT scipiccia cycloidalspiralsamplingforthreemodalxrayctflyscanswithtwodimensionalphasesensitivity AT aolivo cycloidalspiralsamplingforthreemodalxrayctflyscanswithtwodimensionalphasesensitivity AT ckhagen cycloidalspiralsamplingforthreemodalxrayctflyscanswithtwodimensionalphasesensitivity |