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01.06.2013 | Computed Tomography

Iterative reconstruction techniques for computed tomography Part 1: Technical principles

verfasst von: Martin J. Willemink, Pim A. de Jong, Tim Leiner, Linda M. de Heer, Rutger A. J. Nievelstein, Ricardo P. J. Budde, Arnold M. R. Schilham

Erschienen in: European Radiology | Ausgabe 6/2013

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Abstract

Objectives

To explain the technical principles of and differences between commercially available iterative reconstruction (IR) algorithms for computed tomography (CT) in non-mathematical terms for radiologists and clinicians.

Methods

Technical details of the different proprietary IR techniques were distilled from available scientific articles and manufacturers' white papers and were verified by the manufacturers. Clinical results were obtained from a literature search spanning January 2006 to January 2012, including only original research papers concerning IR for CT.

Results

IR for CT iteratively reduces noise and artefacts in either image space or raw data, or both. Reported dose reductions ranged from 23 % to 76 % compared to locally used default filtered back-projection (FBP) settings, with similar noise, artefacts, subjective, and objective image quality.

Conclusion

IR has the potential to allow reducing the radiation dose while preserving image quality. Disadvantages of IR include blotchy image appearance and longer computational time. Future studies need to address differences between IR algorithms for clinical low-dose CT.

Key Points

• Iterative reconstruction technology for CT is presented in non-mathematical terms.

• IR reduces noise and artefacts compared to filtered back-projection.

• IR can improve image quality in routine-dose CT and lower the radiation dose.

• IR's disadvantages include longer computation and blotchy appearance of some images.

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Titel: Iterative reconstruction techniques for computed tomography Part 1: Technical principles
verfasst von: Martin J. Willemink
Pim A. de Jong
Tim Leiner
Linda M. de Heer
Rutger A. J. Nievelstein
Ricardo P. J. Budde
Arnold M. R. Schilham
Publikationsdatum: 01.06.2013
Verlag: Springer-Verlag
Erschienen in: European Radiology / Ausgabe 6/2013
Print ISSN: 0938-7994
Elektronische ISSN: 1432-1084
DOI: https://doi.org/10.1007/s00330-012-2765-y

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Iterative reconstruction techniques for computed tomography Part 1: Technical principles