Assessment of liver fat quantification in the presence of iron

Mark Bydder, Masoud Shiehmorteza, Takeshi Yokoo, Sebastian Sugay, Michael S. Middleton, Olivier Girard, Michael E. Schroeder, Tanya Wolfson, Anthony Gamst, Claude Sirlin

Research output: Contribution to journalArticle

43 Citations (Scopus)

Abstract

This study assesses the stability of magnetic resonance liver fat measurements against changes in T2* due to the presence of iron, which is a confound for accurate quantification. The liver T2* was experimentally shortened by intravenous infusion of a super paramagnetic iron oxide contrast agent. Low flip angle multiecho gradient echo sequences were performed before, during and after infusion. The liver fat fraction (FF) was calculated in co-localized regions-of-interest using T2* models that assumed no decay, monoexponential decay and biexponential decay. Results show that, when T2* was neglected, there was a strong underestimation of FF and with monoexponential decay there was a weak overestimation of FF. Curve-fitting using the biexponential decay was found to be problematic. The overestimation of FF may be due to remaining deficiencies in the model, although is unlikely to be important for clinical diagnosis of steatosis.

Original languageEnglish (US)
Pages (from-to)767-776
Number of pages10
JournalMagnetic Resonance Imaging
Volume28
Issue number6
DOIs
StatePublished - Jul 2010

Fingerprint

Oils and fats
Liver
Iron
Fats
Curve fitting
Magnetic resonance
Iron oxides
Intravenous Infusions
Contrast Media
Magnetic Resonance Spectroscopy

Keywords

  • Fat quantification
  • Iron
  • Liver
  • SPIO

ASJC Scopus subject areas

  • Biophysics
  • Radiology Nuclear Medicine and imaging
  • Biomedical Engineering
  • Medicine(all)

Cite this

Bydder, M., Shiehmorteza, M., Yokoo, T., Sugay, S., Middleton, M. S., Girard, O., ... Sirlin, C. (2010). Assessment of liver fat quantification in the presence of iron. Magnetic Resonance Imaging, 28(6), 767-776. https://doi.org/10.1016/j.mri.2010.03.017

Assessment of liver fat quantification in the presence of iron. / Bydder, Mark; Shiehmorteza, Masoud; Yokoo, Takeshi; Sugay, Sebastian; Middleton, Michael S.; Girard, Olivier; Schroeder, Michael E.; Wolfson, Tanya; Gamst, Anthony; Sirlin, Claude.

In: Magnetic Resonance Imaging, Vol. 28, No. 6, 07.2010, p. 767-776.

Research output: Contribution to journalArticle

Bydder, M, Shiehmorteza, M, Yokoo, T, Sugay, S, Middleton, MS, Girard, O, Schroeder, ME, Wolfson, T, Gamst, A & Sirlin, C 2010, 'Assessment of liver fat quantification in the presence of iron', Magnetic Resonance Imaging, vol. 28, no. 6, pp. 767-776. https://doi.org/10.1016/j.mri.2010.03.017
Bydder M, Shiehmorteza M, Yokoo T, Sugay S, Middleton MS, Girard O et al. Assessment of liver fat quantification in the presence of iron. Magnetic Resonance Imaging. 2010 Jul;28(6):767-776. https://doi.org/10.1016/j.mri.2010.03.017
Bydder, Mark ; Shiehmorteza, Masoud ; Yokoo, Takeshi ; Sugay, Sebastian ; Middleton, Michael S. ; Girard, Olivier ; Schroeder, Michael E. ; Wolfson, Tanya ; Gamst, Anthony ; Sirlin, Claude. / Assessment of liver fat quantification in the presence of iron. In: Magnetic Resonance Imaging. 2010 ; Vol. 28, No. 6. pp. 767-776.
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