Reduzierung von Missing-Wedge-Artefakten der CT mit DIRECTT
-
Axel Lange
Kurzfassung
Typische „Missing Wedge“(MW)-Artefakte in Rekonstruktionen der Computertomografie können mit dem iterativen DIRECTT-Algorithmus (Direkte iterative Rekonstruktion computertomografischer Trajektorien) unterdrückt werden. Die durch fehlende Projektionswinkel bedingten MW-Restriktionen betreffen bisher nur Sonderapplikationen der Röntgen- und Neutronentomografie, müssen in der Nanometer auflösenden Elektronentomografie jedoch als Standard akzeptiert werden. Die MW-Artefakte werden besonders effektiv mit einer spezifischen DIRECTT-Prozedur partiell diskreter Zwischenlösungen beseitigt. Für die Beurteilung der Abbildungsqualität werden Rekonstruktionen von vollständigen und unvollständigen Mess- und Modell-Datensätzen erzeugt und mit Ergebnissen anderer Algorithmen (gefilterte Rückprojektion (FBP) und ART-Methoden) verglichen. Die Fourier-Transformierten der Rekonstruktionen demonstrieren die erfolgreiche Ergänzung der fehlenden Information im MW-Bereich. Die quantitative Bewertung der lokalen Rekonstruktionsqualität mit Methoden der räumlichen Statistik ergibt auch für unterschiedliche Signal-Rausch-Verhältnisse signifikante Vorteile gegenüber FBP und ART.
Abstract
Typical missing wedge (MW) artifacts in reconstructions of computerised tomography (CT) can be suppressed by the iterative algorithm DIRECTT (Direct Iterative Reconstruction of Computed Tomography Trajectories). The MW-restrictions due to missing projection angles are presently limited to specific applications of X-ray and neutron tomography. However, in the field of nanometer resolving electron tomography they are an inevitable standard. The MW artifacts can be removed much better by an additional procedure of the DIRECTT algorithm applying partially discrete intermediate solutions. Reconstructions of complete and incomplete data sets from measurements and models are created in order to evaluate their quality, and to compare them to the results of other algorithms (filtered back projection (FBP) and ART approaches). The Fourier transforms of the reconstructions demonstrate the contribution of supplementary information to the missing wedge sector. For further assessment of the reconstruction quality, adapted techniques of spatial statistics are applied.
Referenzen
1 P. A.Midgley, R. E.Dunin-Borkowski: Electron tomography and holography in materials science, Nature Materials8 (2009), S. 271–280Suche in Google Scholar
2 R.Grothausmann, G.Zehl, I.Manke, S.Fiechter, P.Bogdanoff, I.Dorbandt, A.Kupsch, A.Lange, M. P.Hentschel, G.Schumacher, J.Banhart: Quantitative Structural Assessment of Heterogeneous Catalysts by Electron Tomography, Journal of the American Chemical Society133 (2011), S. 18161–18171Suche in Google Scholar
3 R.Grothausmann, I.Manke, G.Zehl, I.Dorbandt, P.Bogdanoff, S.Fiechter, M. P.Hentschel, A.Lange, A.Kupsch, A.Hilger, J.Banhart: Charakterisierung von Katalysatormaterialien für Brennstoffzellen mittels Elektronentomografie, MP Materials Testing52 (2010), S. 706–711Suche in Google Scholar
4 A.Lange, M. P.Hentschel, A.Kupsch: Computertomografische Rekonstruktion mit DIRECTT, MP Materials Testing50 (2008), S. 272–277Suche in Google Scholar
5 A.Kupsch, A.Lange, M. P.Hentschel, B. R.Müller: Improved Computed Tomography by Variable Desmearing: Model reconstructions by iterative DIRECTT algorithm, MP Materials Testing52 (2010), S. 394–400Suche in Google Scholar
6 M. P.Hentschel, A.Lange, A.Kupsch, B. R.Müller: Rekonstruktion unvollständiger computertomografischer Modelldatensätze mit DIRECTT-Algorithmus, MP Materials Testing52 (2010), S. 668–675Suche in Google Scholar
7 A.Lange, A.Kupsch, M. P.Hentschel, I.Manke, N.Kardjilov, T.Arlt, R.Grothausmann: Reconstruction of limited computed tomography data of fuel cell components using DIRECTT, Journal of Power Sources196 (2011), S. 5293–5298Suche in Google Scholar
8 I.Manke, N.Kardjilov, R.Schäfer, A.Hilger, M.Strobl, M.Dawson, C.Grünzweig, G.Behr, M.Hentschel, C.David, A.Kupsch, A.Lange, J.Banhart: Three-dimensional imaging of magnetic domains, Nature Communications1 (2010), S. 12510.1038/ncomms1125Suche in Google Scholar PubMed
9 H.Markötter, I.Manke, R.Kuhn, T.Arlt, N.Kardjilov, M. P.Hentschel, A.Kupsch, A.Lange, C.Hartnig, J.Scholta, J.Banhart: Neutron tomografic investigations of water distributions in polymer electrolyte membrane fuel cell stacks, Journal of Power Sources219 (2012), S. 120–125Suche in Google Scholar
10 J.Radon: Über die Bestimmung von Funktionen längs gewisser Mannigfaltigkeiten, Berichte der math.-phys. Kl. Sächsischen Gesellschaft der Wissenschaften59 (1917), S. 262–277Suche in Google Scholar
11 R.Halmshaw: Industrial Radiology, Chapman & Hall, London198210.1007/978-94-009-7340-4Suche in Google Scholar
12 International Standard ISO 15708-2: Non-destructive testing – Radiation methods – Computed tomography – Part 2: Examination practices2002Suche in Google Scholar
13 A.Lange, A.Kupsch, M. P.Hentschel, B. R.Müller: DIRECTT-Rekonstruktionen im Vergleich zur Gefilterten Rückprojektion, MP Materials Testing (2014), im Druck10.3139/120.110610Suche in Google Scholar
14 S.Lück, A.Kupsch, A.Lange, M. P.Hentschel, V.Schmidt: Statistical Comparison of Various Reconstruction Algorithms with respect to Missing Wedge Artifacts in Computed Tomography, Materials Research Society Symposium Proceedings1421 (2011) 10.1557/opl.2012.209Suche in Google Scholar
© 2014, Carl Hanser Verlag, München
Artikel in diesem Heft
- Inhalt/Contents
- Inhalt
- Fachbeiträge/Technical Contributions
- Burst Strength of Composite Cylinders – Assessment of the Type of Statistical Distribution
- Effects of Zn/Cu Ratio and Silicon on Microstructure, Mechanical Properties, Tarnish and Corrosion Resistance of As-Cast 940 Silver Alloys
- Analysis of the Frequency as an Integral Method for the Testing of Anisotropic 3D Sheet Metal Structure
- Mechanical and Thermal Properties of a Cu-CNT Composite with Carbon Nanotubes Synthesized by CVD Process
- The Mechanical and Electrical Properties of the Ternary Bi-Ga-Sb System
- Experimental Investigation of the Corrosion Mechanism of Cemented Soils in Magnesium Sulfate Solution
- Experimental and Analytical Study of Masonry Constructions Reinforced with Bed Joints
- The Fracture Toughness of Fe2B Formed on Boronized AISI 304
- Effects of Ferroboron and Ferrochromium Powder Addition on Abrasive Wear Resistance of Fe-Based Hardfacing Coatings
- Fabrication of Al/Mg Bimetal Compound Casting by Lost Foam Technique and Liquid-Solid Process
- Effects of Si and Zn on Machinability and Wear Resistance of AZ91 and AS91 Magnesium Alloys
- DIRECTT-Rekonstruktionen im Vergleich zur gefilterten Rückprojektion
- Reduzierung von Missing-Wedge-Artefakten der CT mit DIRECTT
- Röntgentomografische Untersuchung eines kommerziellen Lithium-Ionen-Kondensators*
- Machining Parameter Optimization of Bidirectional CFRP Composite Pipe by Genetic Algorithm
- Investigation of Lost Foam Casted Aluminum Bimetal Microstructures
- Taguchi-Based Grey Relation Optimization of Machining Parameters and Cutting Path Strategies in CNC Pocket Milling Operations
- Reliable Evaluation of Acceptability of Weld for Final Disposal Based on the Canister Copper Weld Inspection Using Different NDT Methods
- Evaluation of the Reliability of NDTesting in Russian Railway Transport
- Vorschau/Preview
- Vorschau
Artikel in diesem Heft
- Inhalt/Contents
- Inhalt
- Fachbeiträge/Technical Contributions
- Burst Strength of Composite Cylinders – Assessment of the Type of Statistical Distribution
- Effects of Zn/Cu Ratio and Silicon on Microstructure, Mechanical Properties, Tarnish and Corrosion Resistance of As-Cast 940 Silver Alloys
- Analysis of the Frequency as an Integral Method for the Testing of Anisotropic 3D Sheet Metal Structure
- Mechanical and Thermal Properties of a Cu-CNT Composite with Carbon Nanotubes Synthesized by CVD Process
- The Mechanical and Electrical Properties of the Ternary Bi-Ga-Sb System
- Experimental Investigation of the Corrosion Mechanism of Cemented Soils in Magnesium Sulfate Solution
- Experimental and Analytical Study of Masonry Constructions Reinforced with Bed Joints
- The Fracture Toughness of Fe2B Formed on Boronized AISI 304
- Effects of Ferroboron and Ferrochromium Powder Addition on Abrasive Wear Resistance of Fe-Based Hardfacing Coatings
- Fabrication of Al/Mg Bimetal Compound Casting by Lost Foam Technique and Liquid-Solid Process
- Effects of Si and Zn on Machinability and Wear Resistance of AZ91 and AS91 Magnesium Alloys
- DIRECTT-Rekonstruktionen im Vergleich zur gefilterten Rückprojektion
- Reduzierung von Missing-Wedge-Artefakten der CT mit DIRECTT
- Röntgentomografische Untersuchung eines kommerziellen Lithium-Ionen-Kondensators*
- Machining Parameter Optimization of Bidirectional CFRP Composite Pipe by Genetic Algorithm
- Investigation of Lost Foam Casted Aluminum Bimetal Microstructures
- Taguchi-Based Grey Relation Optimization of Machining Parameters and Cutting Path Strategies in CNC Pocket Milling Operations
- Reliable Evaluation of Acceptability of Weld for Final Disposal Based on the Canister Copper Weld Inspection Using Different NDT Methods
- Evaluation of the Reliability of NDTesting in Russian Railway Transport
- Vorschau/Preview
- Vorschau