MEDLINE Journals

    Non-invasive detection of liver fibrosis: Is superparamagnetic iron oxide particle-enhanced MR imaging a contributive technique?

    Authors

    Lucidarme O, Baleston F, Cadi M, et al. 

    Institution

    Department of Radiology, Université Paris VI, Hôpital de la Pitié-Salpêtrière Assistance Publique-Hôpitaux de Paris, 47, boulevard de l'Hôpital, 75651 Paris Cedex 13, France. olivier.lucidarme@psl.ap-hop-paris.fr

    Source

    Eur Radiol 2003 Mar; 13(3) :467-74.

    Abstract

    The purpose of our study was to evaluate the ability of superparamagnetic iron oxide (SPIO)-enhanced MR imaging to detect liver fibrosis in patients with chronic liver disease and to compare the findings with histopathological data. Sixty-seven patients with chronic hepatitis ( n=58) or focal nodular hyperplasia (FNH; n=9) were studied using a 1.5-T MR system. The protocol included proton density-weighted, T2-weighted spin-echo (SE) and fast SE (FSE) sequences before and after SPIO administration and T2*-weighted gradient-recalled-echo (GRE) sequences after SPIO. Pre- and post-contrast T2-weighted and T2*-weighted sequences were retrospectively evaluated by three independent observers for evidence of non-tumor hypersignal intensities. Three liver patterns were considered: thick reticulations; thin reticulations; and/or multiple areas of hypersignal intensities. Unenhanced or enhanced patterns were compared with histopathological specimens, which had been obtained by percutaneous biopsy of the right lobe within a maximum of 12 months of MR examination. Liver fibrosis was histologically graded using a five-level scale (F0-F4), according to the METAVIR classification. Histopathology demonstrated significant fibrosis (F2-F4) in 57 patients, non-significant fibrosis in 1 patient (F1), and normal liver surrounding FNH in 9 patients (F0). After SPIO administration, at least one pattern of non-tumor hypersignal intensities was seen in 43 (76%) of the 57 patients with F>/=2 with good agreement (kappa=0.68) compared with 2 (20%) of the 10 F0/1 patients ( p<0.01). Attenuated non-homogeneous liver-signal intensities with persistent thick reticulations, thin reticulations, or multiple areas of hypersignals were observed in, respectively, 30, 52, and 56% of patients with F>/=2 with moderate agreement (kappa=0.51). Before SPIO, MR images were positive in 21 of 57 (37%) F>/=2 and zero F0/1 patients. Post-contrast proton-density-weighted and T2*-weighted GRE were the most sensitive sequences for detecting non-tumor hypersignal intensities. In patients with chronic liver diseases, SPIO-enhanced MR imaging exhibits non-tumor hypersignal intensities indicative of liver fibrosis by decreasing the signal from the non-fibrotic areas where Kupffer cells are present.

    Mesh

    Adult
    Aged
    Biopsy, Needle
    Chronic Disease
    Cohort Studies
    Contrast Media
    Female
    Ferric Compounds
    Humans
    Image Enhancement
    Immunohistochemistry
    Liver Cirrhosis
    Magnetic Resonance Imaging
    Male
    Middle Aged
    Observer Variation
    Particle Size
    Probability
    Retrospective Studies
    Sensitivity and Specificity
    Severity of Illness Index

    Language

    eng

    Pub Type(s)

    Comparative Study Journal Article

    PubMed ID

    12594548

    Content Manager
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