Optimal Spatial Filtering Schemes and Compact Tomography Setups
2016 (English)In: Research in nondestructive evaluation (Print), ISSN 0934-9847, E-ISSN 1432-2110, Vol. 27, no 2, 69-85 p.Article in journal (Refereed) PublishedText
Three compact computerized tomography (CT) scanner prototypes are established and tested for acceptable reconstruction results. Performance of conventional iterative reconstruction algorithm is enhanced via incorporating a spatial filtering/masking step. Generally, these masking strategies incorporate an arbitrary (3 3 or 2 2) size of square averaging mask to subdue the ill-posedness. Three different spatial filtering schemes are tested in this work. The objective is to remove any dependency on a user for deciding an appropriate masking parameter. The outcome of the simulation study is successfully verified for three real data situations using three specimens with pre-assigned/known inner profile. Such austere scanning situations arise in real-time environment especially for undetachable/fixed small size objects situated in inaccessible locations. The present study encourages the development of low budget CT setups.
Place, publisher, year, edition, pages
Taylor & Francis, 2016. Vol. 27, no 2, 69-85 p.
Compact CT scanners; optimal spatial filtering; sparse data tomography
IdentifiersURN: urn:nbn:se:liu:diva-130083DOI: 10.1080/09349847.2015.1060659ISI: 000377208500001OAI: oai:DiVA.org:liu-130083DiVA: diva2:946919