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Abdom Radiol (NY). 2017 Jun;42(6):1713-1720. doi: 10.1007/s00261-017-1077-8.

Assessment of liver iron overload by 3 T MRI.

Author information

1
Digestive Unit, Department of Radiology, Hôpital Pontchaillou, Rennes University Hospital, 2 rue H. Le Guilloux, 35033, Rennes, France.
2
Hepatic Disease Unit, Clinical investigation center, Hôpital Pontchaillou, Rennes University Hospital, CIC INSERM 1414, 2 rue H. Le Guilloux, 35033, Rennes, France.
3
Department of Hepatology, Rennes University Hospital, 2 rue H. Le Guilloux, 35033, Rennes, France.
4
INSERM UMR991, Rennes University Hospital, 2 rue H. Le Guilloux, 35033, Rennes, France.
5
VisAGeS U746 Unit/Project, INSERM/INRIAIRISA, UMR CNRS 6074, University of Rennes 1, Beaulieu Campus, 35042, Rennes, France.
6
Department of Radiology, Rennes University Hospital, 2 rue H. Le Guilloux, 35033, Rennes, France.
7
LTSI, INSERM U1099, University of Rennes 1, Beaulieu Campus, 35042, Rennes, France.
8
Department of Pathology, Rennes University Hospital, 2 rue H. Le Guilloux, 35033, Rennes, France.
9
Service d'anatomie et de cytologie, Hôpital Pontchaillou, CHU Rennes, 2 rue H. Le Guilloux, 35033, Rennes, France.
10
Digestive Unit, Department of Radiology, Hôpital Pontchaillou, Rennes University Hospital, 2 rue H. Le Guilloux, 35033, Rennes, France. yves.gandon@chu-rennes.fr.
11
Hepatic Disease Unit, Clinical investigation center, Hôpital Pontchaillou, Rennes University Hospital, CIC INSERM 1414, 2 rue H. Le Guilloux, 35033, Rennes, France. yves.gandon@chu-rennes.fr.
12
LTSI, INSERM U1099, University of Rennes 1, Beaulieu Campus, 35042, Rennes, France. yves.gandon@chu-rennes.fr.

Abstract

PURPOSE:

To evaluate the performance and limitations of the signal intensity ratio method for quantifying liver iron overload at 3 T.

METHODS:

Institutional review board approval and written informed consent from all participants were obtained. One hundred and five patients were included prospectively. All patients underwent a liver biopsy with biochemical assessment of hepatic iron concentration and a 3 T MRI scan with 5 breath-hold single-echo gradient-echo sequences. Linear correlation between liver-to-muscle signal intensity ratio and liver iron concentration was calculated. The algorithm for calculating magnetic resonance hepatic iron concentration was adapted from the method described by Gandon et al. with echo times divided by 2. Sensitivity and specificity were calculated.

RESULTS:

Five patients were excluded (coil selection failure or missing sequence) and 100 patients were analyzed, 64 men and 36 women, 52 ± 13.3 years old, with a biochemical hepatic iron concentration range of 0-630 µmol/g. Linear correlation between biochemical hepatic iron concentration and MR-hepatic iron concentration was excellent with a correlation coefficient = 0.96, p < 0.0001. Sensitivity and specificity were, respectively, 83% (0.70-0.92) and 96% (0.85-0.99), with a pathological threshold of 36 µmol/g.

CONCLUSION:

Signal intensity ratio method for quantifying liver iron overload can be used at 3 T with echo times divided by 2.

KEYWORDS:

3 Tesla; Iron overload; Liver; MRI; Quantification

PMID:
28224171
DOI:
10.1007/s00261-017-1077-8
[Indexed for MEDLINE]
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