Measurement of liver stiffness with two imaging techniques: Magnetic resonance elastography and ultrasound elastometry
| Autor: | Ludovic Robert, Lu Wang, Sabine F. Bensamoun, Jean-Paul Latrive, Fabrice Charleux, Marie-Christine Ho Ba Tho |
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| Rok vydání: | 2008 |
| Předmět: |
Adult
Male Shear waves medicine.medical_specialty Materials science Shear stiffness Sensitivity and Specificity Region of interest Liver stiffness Liver tissue Image Interpretation Computer-Assisted medicine Humans Radiology Nuclear Medicine and imaging Elasticity (economics) business.industry Ultrasound Reproducibility of Results Middle Aged Image Enhancement Magnetic Resonance Imaging Magnetic resonance elastography Elasticity Imaging Techniques Female Radiology business Algorithms Biomedical engineering |
| Zdroj: | Journal of Magnetic Resonance Imaging. 28:1287-1292 |
| ISSN: | 1522-2586 1053-1807 |
| Popis: | Purpose: To cross-validate the magnetic resonance elastography (MRE) technique with a clinical device, based on an ultrasound elastometry system called Fibroscan. Materials and Methods: Ten healthy subjects underwent an MRE and a Fibroscan test. The MRE technique used a round pneumatic driver at 60 Hz to generate shear waves inside the liver. An elastogram representing a map of the liver stiffness was generated allowing for the measurement of the average liver stiffness inside a region of interest. The Fibroscan technique used an ultrasound probe (3.5 MHz) composed of a vibrator that sent low-frequency (50 Hz) shear waves inside the right liver lobe. The probe acts as an emitter-receptor that measures the velocity of the waves propagated inside the liver tissue. Results: The mean shear stiffness measured with the MRE and Fibroscan techniques were 1.95 0.06 kPa and 1.79 0.30 kPa, respectively. A higher standard deviation was found for the same subject with Fibroscan. Conclusion: This study shows why MRE should be investigated beyond the Fibroscan. The MRE technique provided elasticity of the entire liver, meanwhile the Fibroscan provided values of elasticity locally. |
| Databáze: | OpenAIRE |
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