Title

Hepatic iron concentration: noninvasive estimation by means of MR imaging techniques

GSBS Program

Biochemistry & Molecular Pharmacology

UMMS Affiliation

Graduate School of Biomedical Sciences

Date

7-16-1999

Document Type

Article

Medical Subject Headings

Adult; Aged; Biopsy; DNA Mutational Analysis; Female; Genes, Recessive; HLA Antigens; Hemochromatosis; Histocompatibility Antigens Class I; Humans; Iron; Liver; Magnetic Resonance Imaging; Male; *Membrane Proteins; Middle Aged; Sensitivity and Specificity

Disciplines

Life Sciences | Medicine and Health Sciences

Abstract

PURPOSE: To identify a magnetic resonance (MR) imaging method sufficiently sensitive and specific in the estimation of hepatic iron content to obviate liver biopsy.

MATERIALS AND METHODS: Thirty-eight patients underwent percutaneous needle biopsy of the liver with chemical measurement of the hepatic iron concentration and hepatic MR imaging with several spin-echo and gradient-recalled-echo (GRE) techniques. Correlations between MR imaging parameters and the hepatic iron concentration were determined. .

RESULTS: Inverse curvilinear relationships were noted between several MR parameters and hepatic iron concentrations. GRE sequences with short repetition and echo times were more accurate and precise than spin-echo sequences for the estimation of hepatic iron concentration. A GRE sequence with a repetition time of 18 msec, an echo time of 5 msec, and a flip angle of 10 degrees showed close correlation between the hepatic iron concentration and the natural logarithm of the ratio of the signal intensity of liver to the SD of background noise (r = -0.94) and low coefficient of variation (12%).

CONCLUSION: MR imaging with these parameters is a rapid, noninvasive, and accurate modality for estimation of hepatic iron concentration; it is sufficiently accurate and precise to obviate liver biopsy for the purpose of measuring hepatic iron concentration.

Rights and Permissions

Citation: Radiology. 1999 Jul;212(1):227-34.

Related Resources

Link to article in PubMed

PubMed ID

10405746