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Multi-scale graph-cut algorithm for efficient water-fat separation.
Umeå University, Faculty of Medicine, Department of Radiation Sciences, Diagnostic Radiology.
2016 (English)In: Magnetic Resonance in Medicine, ISSN 0740-3194, E-ISSN 1522-2594Article in journal (Refereed) Epub ahead of print
Abstract [en]

PURPOSE: To improve the accuracy and robustness to noise in water-fat separation by unifying the multiscale and graph cut based approaches to B0 -correction.

METHODS: A previously proposed water-fat separation algorithm that corrects for B0 field inhomogeneity in 3D by a single quadratic pseudo-Boolean optimization (QPBO) graph cut was incorporated into a multi-scale framework, where field map solutions are propagated from coarse to fine scales for voxels that are not resolved by the graph cut. The accuracy of the single-scale and multi-scale QPBO algorithms was evaluated against benchmark reference datasets. The robustness to noise was evaluated by adding noise to the input data prior to water-fat separation.

RESULTS: Both algorithms achieved the highest accuracy when compared with seven previously published methods, while computation times were acceptable for implementation in clinical routine. The multi-scale algorithm was more robust to noise than the single-scale algorithm, while causing only a small increase (+10%) of the reconstruction time.

CONCLUSION: The proposed 3D multi-scale QPBO algorithm offers accurate water-fat separation, robustness to noise, and fast reconstruction. The software implementation is freely available to the research community. Magn Reson Med, 2016. © 2016 International Society for Magnetic Resonance in Medicine.

Place, publisher, year, edition, pages
2016.
Keyword [en]
Dixon, chemical shift imaging, fat suppression, graph cuts, multi-scale processing, water-fat separation
National Category
Radiology, Nuclear Medicine and Medical Imaging
Identifiers
URN: urn:nbn:se:umu:diva-137101DOI: 10.1002/mrm.26479PubMedID: 27714826OAI: oai:DiVA.org:umu-137101DiVA: diva2:1115083
Available from: 2017-06-26 Created: 2017-06-26 Last updated: 2017-06-26

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CiteExportLink to record
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Citation style
  • apa
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  • vancouver
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More styles
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  • de-DE
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  • nn-NB
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  • Other locale
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Output format
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