| Effect of the number of projections in X-ray CT imaging on image quality and digital volume correlation measurement | |
Zhang, Xuanhao1; Sun LJ(孙立娟)2 ; Wang, Bo1; Pan, Bing1
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| Corresponding Author | Pan, Bing(panb@buaa.edu.cn) |
| Source Publication | MEASUREMENT
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| 2022-05-15 | |
| Volume | 194Pages:12 |
| ISSN | 0263-2241 |
| Abstract | Digital volume correlation (DVC) quantifies internal 3D displacement and strain fields by correlating the volume images of a tested object acquired at different states. When using X-ray CT-based DVC, the number of projections is a key parameter that affects the acquisition time and quality of reconstructed volumetric images, and therefore the precision and temporal resolutions of DVC measurement. More projections result in high-quality volume images for DVC calculation but longer acquisition time and pronounced thermal drifts of the X-ray source. Few projections lead to quicker acquisition and fewer thermal drifts, but may degrade image quality and thus induce larger DVC measurement errors. Selecting an appropriate number of projections during CT imaging is therefore of practical significance for DVC measurement. To solve this dilemma, the effect of the number of projections on DVC measurements with X-ray CT is experimentally investigated in this work. First, numerically simulated speckle volume images with different numbers of projections were reconstructed by using FDK (Feldkamp) al-gorithm, and the influence of the number of projections on DVC measurement was analyzed. Then, real rescan and compression experiments performed on a copper foam sample were carried out to further study the effect of projection number on DVC measurements. Both simulation and real experiments show that more projections result in longer imaging time but higher quality volume image and DVC measurement. DVC measurement errors decrease with the increase of projections at different decline rates. Therefore, an appropriate number of pro-jections can be specified based on the results according to the requirements of DVC measurement precision and temporal resolution. For the specific X-ray CT device used in this real compression experiment, 36 ~ 60 pro-jections are suggested to balance measurement precision and temporal resolution, and more than 720 projections are necessary for pursuing higher accuracy. |
| Keyword | Digital volume correlation Number of projections X-ray computed tomography FDK algorithm |
| DOI | 10.1016/j.measurement.2022.111061 |
| Indexed By | SCI ; EI |
| Language | 英语 |
| WOS ID | WOS:000793176700002 |
| WOS Keyword | TOMOGRAPHY ; STRAIN |
| WOS Research Area | Engineering ; Instruments & Instrumentation |
| WOS Subject | Engineering, Multidisciplinary ; Instruments & Instrumentation |
| Funding Project | National Natural Science Foundation of China[11925202] ; National Natural Science Foundation of China[11872009] |
| Funding Organization | National Natural Science Foundation of China |
| Classification | 二类/Q1 |
| Ranking | 2 |
| Contributor | Pan, Bing |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://dspace.imech.ac.cn/handle/311007/89352 |
| Collection | 非线性力学国家重点实验室 |
| Affiliation | 1.Beihang Univ, Inst Solid Mech, Beijing 100191, Peoples R China; 2.Chinese Acad Sci, Inst Mech, Beijing 100190, Peoples R China |
| Recommended Citation GB/T 7714 | Zhang, Xuanhao,Sun LJ,Wang, Bo,et al. Effect of the number of projections in X-ray CT imaging on image quality and digital volume correlation measurement[J]. MEASUREMENT,2022,194:12. |
| APA | Zhang, Xuanhao,孙立娟,Wang, Bo,&Pan, Bing.(2022).Effect of the number of projections in X-ray CT imaging on image quality and digital volume correlation measurement.MEASUREMENT,194,12. |
| MLA | Zhang, Xuanhao,et al."Effect of the number of projections in X-ray CT imaging on image quality and digital volume correlation measurement".MEASUREMENT 194(2022):12. |
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| Jp2022FA368_2022_Eff（6196KB） | 期刊论文 | 出版稿 | 开放获取 | CC BY-NC-SA | View Download | |
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