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Noise distribution in SENSE- and GRAPPA-reconstructed images: a computer simulation study
Department of Biomedical Engineering, Örebro University Hospital, Örebro, Sweden.ORCID iD: 0000-0002-8351-3367
2007 (English)In: Magnetic Resonance Imaging, ISSN 0730-725X, E-ISSN 1873-5894, Vol. 25, no 7, 1089-1094 p.Article in journal (Refereed) Published
Abstract [en]

This work presents a descriptive study of noise distributions in images reconstructed according to the parallel imaging methods SENSE and GRAPPA. In the computer simulations, two different settings were used for describing an object. The first setting included a synthetic object and eight complex-valued coil sensitivities. In the second setting, a complex-valued in vitro object, composed of four individual coil images, was used. After adding noise and subsampling k-space for each coil image, reconstruction was performed according to SENSE, with and without regularization, and GRAPPA for different reduction factors. A set of images was created for three different reduction factors. Noise distributions were determined for each data set and compared with each other. The results of this study show that the noise distributions in SENSE- and GRAPPA-reconstructed images differ. The noise in images reconstructed according to GRAPPA has a more uniform spatial distribution compared with SENSE-reconstructed images, in which the noise varies regionally according to the geometry factor. The noise distribution in SENSE-reconstructed images using regularization showed a similar but lowered pattern of noise compared with images reconstructed according to SENSE without regularization.

Place, publisher, year, edition, pages
New York, USA: Elsevier, 2007. Vol. 25, no 7, 1089-1094 p.
Keyword [en]
Parallel imaging, noise, SENSE, GRAPPA
National Category
Medical and Health Sciences Radiology, Nuclear Medicine and Medical Imaging
Identifiers
URN: urn:nbn:se:oru:diva-50372DOI: 10.1016/j.mri.2006.11.003ISI: 000249056200009PubMedID: 17707171Scopus ID: 2-s2.0-34547733373OAI: oai:DiVA.org:oru-50372DiVA: diva2:930263
Available from: 2016-05-23 Created: 2016-05-23 Last updated: 2016-05-25Bibliographically approved

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CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf