Erschienen in:
01.01.2013 | Hepatobiliary-Pancreas
Separation of advanced from mild hepatic fibrosis by quantification of the hepatobiliary uptake of Gd-EOB-DTPA
verfasst von:
Bengt Norén, Mikael Fredrik Forsgren, Olof Dahlqvist Leinhard, Nils Dahlström, Johan Kihlberg, Thobias Romu, Stergios Kechagias, Sven Almer, Örjan Smedby, Peter Lundberg
Erschienen in:
European Radiology
|
Ausgabe 1/2013
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Abstract
Objectives
To apply dynamic contrast-enhanced (DCE) MRI on patients presenting with elevated liver enzymes without clinical signs of hepatic decompensation in order to quantitatively compare the hepatocyte-specific uptake of Gd-EOB-DTPA with histopathological fibrosis stage.
Methods
A total of 38 patients were prospectively examined using 1.5-T MRI. Data were acquired from regions of interest in the liver and spleen by using time series of single-breath-hold symmetrically sampled two-point Dixon 3D images (non-enhanced, arterial and venous portal phase; 3, 10, 20 and 30 min) following a bolus injection of Gd-EOB-DTPA (0.025 mmol/kg). The signal intensity (SI) values were reconstructed using a phase-sensitive technique and normalised using multiscale adaptive normalising averaging (MANA). Liver-to-spleen contrast ratios (LSC_N) and the contrast uptake rate (K
Hep) were calculated. Liver biopsy was performed and classified according to the Batts and Ludwig system.
Results
Area under the receiver-operating characteristic curve (AUROC) values of 0.71, 0.80 and 0.78, respectively, were found for K
Hep, LSC_N10 and LSC_N20 with regard to severe versus mild fibrosis. Significant group differences were found for K
Hep (borderline), LSC_N10 and LSC_N20.
Conclusions
Liver fibrosis stage strongly influences the hepatocyte-specific uptake of Gd-EOB-DTPA. Potentially the normalisation technique and K
Hep will reduce patient and system bias, yielding a robust approach to non-invasive liver function determination.
Key Points
• In chronic liver disease, staging of hepatic fibrosis is essential for prognosis.
• The accuracy of liver biopsy for assessing fibrosis has been questioned.
• Liver fibrosis stage strongly influences the hepatocyte-specific uptake of Gd-EOB-DTPA on MRI.
• Normalisation technique and K
Hep
are valuable for non-invasive liver function assessment.