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Iterative Improvement of Non-Exact Reconstruction in Cone-Beam CT
Linköping University, The Institute of Technology. Linköping University, Department of Electrical Engineering, Computer Vision.
Linköping University, The Institute of Technology. Linköping University, Department of Electrical Engineering, Computer Vision.
Linköping University, The Institute of Technology. Linköping University, Department of Electrical Engineering, Computer Vision.ORCID iD: 0000-0002-9072-2204
2005 (English)In: Fully 3D 2005, Eighth International Meeting on Fully Three-dimensional Image Reconstruction in Radiology and Nuclear Medicine,2005, 2005Conference paper, Published paper (Refereed)
Abstract [en]

Contemporary reconstruction for helical cone-beam CT is mostly based on non-exact algorithms, which produce more or less unacceptable artifacts for cone angles above a certain limit. We report on attempts to extend the applicability of these algorithms to higher cone angles by suppressing artifacts by means of iterative post-processing. The iterative loop includes a ramp-filtering step before back-projection, which promotes fast convergence. The scheme has been applied to the original PI-method as well as to Siemens' AMPR and WFBP methods. Using ordered subsets in the iterative loop for WFBP, we achieved almost spotless images in one single iteration for cone angles \pm 9 degrees.  

Place, publisher, year, edition, pages
2005.
Keyword [en]
cone-beam tomography, enhancement, iterative reconstruction, non-exact algorithm, ordered subsets
National Category
Engineering and Technology
Identifiers
URN: urn:nbn:se:liu:diva-42663Local ID: 67762OAI: oai:DiVA.org:liu-42663DiVA: diva2:263520
Available from: 2009-10-10 Created: 2009-10-10 Last updated: 2015-03-17

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http://www.cvl.isy.liu.se/ScOut/Publications/Papers/PaperIterativeEnhancement3D2005.pdf

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Sunnegårdh, JohanDanielsson, Per-ErikMagnusson, Maria

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  • sv-SE
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Output format
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