Accelerated CT Sub-pixel Super Resolution
The resolution of standard CT scans is dictated by the physical constraints of the detector’s sampling resolution. Super resolution is a class of techniques used to improve the reconstruction resolution beyond the physical limitations of the detector, via pure computational methods or with novel t...
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| Main Authors: | , , |
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| Format: | Article |
| Language: | deu |
| Published: |
NDT.net
2025-02-01
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| Series: | e-Journal of Nondestructive Testing |
| Online Access: | https://www.ndt.net/search/docs.php3?id=30767 |
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| Summary: | The resolution of standard CT scans is dictated by the physical constraints of the detector’s sampling resolution. Super resolution is a class of techniques used to improve the reconstruction resolution beyond the physical limitations of the detector, via pure computational methods or with novel trajectories to acquire additional data. This work characterizes an improved accelerated super resolution technique that builds upon an existing method, SubpiX, and acquires projections along a trajectory of sub-pixel detector translations. The sub-pixel shifts introduce sampling across the spatial domain of each pixel, allowing the resulting images to be combined and upsampled to a higher resolution projection for reconstruction. This technique is shown to be flexible, allowing for different amounts of additional data to improve reconstruction quality at the cost of increased acquisition length. This paper compares the super resolution results using various amounts of additional acquired data.
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| ISSN: | 1435-4934 |