The role of MR imaging in detection of hepatic iron overload in patients with cirrhosis of different origins
| Autor: | Krzysztof P. Bielawski, Edyta Szurowska, Tomasz Romanowski, Ewa Iżycka-Świeszewska, Tomasz Nowicki, Michał Studniarek, Katarzyna Sikorska |
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| Rok vydání: | 2010 |
| Předmět: |
Adult
Liver Cirrhosis Male Heterozygote medicine.medical_specialty Pathology Iron Overload Cirrhosis Biopsy Young Adult Internal medicine medicine Humans Prospective Studies lcsh:RC799-869 Hemochromatosis Protein Pathological Aged Aged 80 and over medicine.diagnostic_test Phantoms Imaging business.industry Histocompatibility Antigens Class I Gastroenterology Membrane Proteins Magnetic resonance imaging General Medicine Middle Aged Hepatology medicine.disease Magnetic Resonance Imaging Elevated hepatic iron concentration Intensity (physics) Liver ROC Curve Liver biopsy Mutation lcsh:Diseases of the digestive system. Gastroenterology Female business Research Article |
| Zdroj: | BMC Gastroenterology BMC Gastroenterology, Vol 10, Iss 1, p 13 (2010) |
| ISSN: | 1471-230X |
| Popis: | Background There are many pathological conditions with hepatic iron overload. Classical definite diagnostic methods of these disorders are invasive and based on a direct tissue biopsy material. For the last years the role of MR imaging in liver diagnostics has been increasing. MRI shows changes of liver intensity in patients with hepatic iron overload. Changes in MR signal are an indirect consequence of change of relaxation times T2 and T2*, that can be directly measured. The purpose of the study was to evaluate usefulness of MR imaging in the detection of hepatic iron overload in patients with cirrhosis of different origins. Methods MR imaging at 1.5T was prospectively performed in 44 patients with liver cirrhosis who had undergone liver biopsy with histopathological assessment of hepatic iron deposits. In all patients the following sequences were used: SE, Express, GRE in T2 and T1-weighted images. Signal intensity (SI) was measured on images obtained with each T2 weighted sequence by means of regions of interest, placed in the liver and paraspinal muscles. The correlation between iron overload, histopathological score, serum ferritin and SI ratio was analyzed. Results In 20 patients with iron overload confirmed by the biopsy, the liver parenchyma demonstrated lower signal intensity than that of paraspinal muscles. This effect was visible only in 8 patients with hepatic iron overload in Express T2-weighted images. Higher signal intensity of liver than that of skeletal muscles on GRE - T2 weighted images was noted in 24 patients with cirrhosis and without elevated hepatic iron concentration. We observed a correlation between low and high iron concentration and liver to muscle SI ratio. Conclusion MR imaging is a useful and fast noninvasive diagnostic tool for the detection of liver iron overload in patients with cirrhosis of different origins. Liver to muscle SI ratio in GRE-T2-weighted sequence facilitates to differentiate patients with low and high degree of hepatic iron overload, which correlates with the origin of liver cirrhosis. |
| Databáze: | OpenAIRE |
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