2007 October | Meng Yin, Jayant A. Talwalkar, M.D., Kevin J. Glaser, Ph.D., Armando Manduca, Ph.D., Roger C. Grimm, M.S., Phillip J. Rossman, M.S., Jeff L. Fidler, M.D., and Richard L. Ehman, M.D.
This study evaluates the diagnostic accuracy of Magnetic Resonance (MR) Elastography in detecting hepatic fibrosis. The technique uses shear waves to measure liver stiffness, which correlates with fibrosis severity. The study involved 35 normal volunteers and 50 patients with chronic liver disease. Liver stiffness increased systematically with fibrosis stage, and receiver operating characteristic (ROC) analysis showed high sensitivity (98%) and specificity (99%) for detecting all fibrosis grades. MR Elastography could also distinguish between moderate/severe (grades 2–4) and mild fibrosis (sensitivity 86%, specificity 85%). Hepatic stiffness was not influenced by steatosis. The technique is safe, non-invasive, and highly accurate, with a high negative predictive value, making it useful for triaging patients for biopsy. The study supports MR Elastography as a reliable method for assessing hepatic fibrosis, particularly in patients with steatosis and high BMI. It has potential to reduce sampling errors and improve diagnostic reliability. The results suggest that MR Elastography could be a valuable tool for monitoring fibrosis progression and evaluating anti-fibrotic therapies. The study also highlights the need for further research to validate the technique in larger populations and under different clinical conditions.This study evaluates the diagnostic accuracy of Magnetic Resonance (MR) Elastography in detecting hepatic fibrosis. The technique uses shear waves to measure liver stiffness, which correlates with fibrosis severity. The study involved 35 normal volunteers and 50 patients with chronic liver disease. Liver stiffness increased systematically with fibrosis stage, and receiver operating characteristic (ROC) analysis showed high sensitivity (98%) and specificity (99%) for detecting all fibrosis grades. MR Elastography could also distinguish between moderate/severe (grades 2–4) and mild fibrosis (sensitivity 86%, specificity 85%). Hepatic stiffness was not influenced by steatosis. The technique is safe, non-invasive, and highly accurate, with a high negative predictive value, making it useful for triaging patients for biopsy. The study supports MR Elastography as a reliable method for assessing hepatic fibrosis, particularly in patients with steatosis and high BMI. It has potential to reduce sampling errors and improve diagnostic reliability. The results suggest that MR Elastography could be a valuable tool for monitoring fibrosis progression and evaluating anti-fibrotic therapies. The study also highlights the need for further research to validate the technique in larger populations and under different clinical conditions.