3D X-Ray Source Deblurring in High Cone-Angle Micro-CT
| العنوان: | 3D X-Ray Source Deblurring in High Cone-Angle Micro-CT |
|---|---|
| المؤلفون: | Glenn R. Myers, Benoit Recur, Heyang Li, Adrian Sheppard, Andrew Kingston |
| المصدر: | IEEE Transactions on Nuclear Science. 62:2075-2084 |
| بيانات النشر: | Institute of Electrical and Electronics Engineers (IEEE), 2015. |
| سنة النشر: | 2015 |
| مصطلحات موضوعية: | Physics, Nuclear and High Energy Physics, Deblurring, business.industry, Iterative method, Magnification, Iterative reconstruction, computer.software_genre, Optics, Nuclear Energy and Engineering, Voxel, Ligand cone angle, Tomography, Electrical and Electronic Engineering, business, Projection (set theory), computer |
| الوصف: | High geometric magnification X-ray micro-computed tomography ( $\mu {\rm CT} $ ) is used to study many high-resolution features in insects, cellular, bones, composite and mineral materials. The resolution of lab-based $\mu {\rm CT}$ in a fine-focus geometry is limited by blurring that occurs below the spatial coherence length of the illuminating radiation: resolution can be no smaller than the size of the X-ray source spot. In cases where the source spot size cannot be reduced (e.g. due to signal-to-noise, time or cost considerations) there is a need to model and correct for this blurring. In ANU CT-lab, we use a high cone angle and high geometric magnification with transmission x-ray source spot size up to three voxels, this creates blurring in the projection. This work takes a simulation approach mimicking such source spot size, and compares systems with horizontal cone-angles (often referred to as the fan angle) of 0.06, 14.36 and 60 degrees. We aim to eliminate this blurring in the reconstruction process. Furthermore, in a high cone-angle geometry, using a reconstruction method that only deconvolves each projection image leads to non-uniform resolution in the reconstruction volume. Alternatively, iterative methods that fully model the non-point source and avoid such artefacts are computationally expensive. We propose a hybrid method that corrects the effect of the non-point source by better modelling the physics rather than just deconvolving each projection image, therefore obtains results closer to the iterative full modelling method, and while being computationally much cheaper. |
| تدمد: | 1558-1578 0018-9499 |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_________::71aa654b8851f99f9f4abdf01e91862a https://doi.org/10.1109/tns.2015.2435782 |
| حقوق: | CLOSED |
| رقم الأكسشن: | edsair.doi...........71aa654b8851f99f9f4abdf01e91862a |
| قاعدة البيانات: | OpenAIRE |
| تدمد: | 15581578 00189499 |
|---|