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Benign hepatocellular tumors: MRI after superparamagnetic iron oxide administration
C Grandin1, B E Van Beers, A Robert
1Department of Radiology, Cliniques Universitaires St-Luc, Brussels, Belgium.
Journal of Computer Assisted Tomography
|May 1, 1995
Summary
Superparamagnetic iron oxide (SPIO)-enhanced MRI improves the detection and diagnosis of benign liver tumors like focal nodular hyperplasia (FNH) and adenomas. SPIO-enhanced T1-weighted images offer the best contrast-to-noise ratio for these lesions.
Area of Science:
- Radiology
- Medical Imaging
- Hepatology
Background:
- Benign hepatocellular tumors, including focal nodular hyperplasia (FNH) and adenomas, can be challenging to diagnose.
- Accurate characterization is crucial for appropriate patient management and avoiding unnecessary interventions.
Purpose of the Study:
- To describe the imaging features of benign hepatocellular tumors using superparamagnetic iron oxide (SPIO)-enhanced MRI.
- To assess the diagnostic utility of SPIO administration in differentiating these liver lesions.
Main Methods:
- T1- and T2-weighted spin-echo (SE) MRI sequences were acquired before and after SPIO administration in 19 patients with FNH or adenomas.
- Lesion detection, qualitative assessment, contrast-to-noise ratio (CNR), and liver/tumor enhancement were evaluated for 37 tumors.
Main Results:
- SPIO-enhanced MRI detected more tumors (36) compared to pre-contrast scans (29).
- SPIO-enhanced T1-weighted images yielded the highest detection rate and CNR.
- The central scar of FNH was most visible on SPIO-enhanced T2-weighted images.
Conclusions:
- SPIO-enhanced T1-weighted MRI significantly improves CNR and detection rates for benign hepatocellular tumors.
- Most FNHs and adenomas showed decreased signal on T2-weighted images post-SPIO.
- No significant difference in signal loss was found between FNH and adenomas after SPIO administration.