Hepatic vascular flow measurements by phase contrast MRI and doppler echography: A comparative and reproducibility study
| Autor: | Brice Robert, Marc-Etienne Meyer, Roger Bouzerar, Jean-Dominique Allart, Hervé Deramond, Cécile Legallais, Olivier Balédent, Thierry Yzet, Fabien Demuynck |
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| Rok vydání: | 2010 |
| Předmět: |
Adult
Male medicine.medical_specialty Perfusion Imaging Phase contrast microscopy Portal vein Sensitivity and Specificity law.invention symbols.namesake Hepatic Artery law medicine Humans Radiology Nuclear Medicine and imaging Reproducibility medicine.diagnostic_test business.industry Angiography Reproducibility of Results Ultrasonography Doppler Magnetic resonance imaging Blood flow medicine.anatomical_structure Vascular flow symbols Female Radiology business Nuclear medicine Doppler effect Blood Flow Velocity Magnetic Resonance Angiography Liver Circulation Artery |
| Zdroj: | Journal of Magnetic Resonance Imaging. 31:579-588 |
| ISSN: | 1522-2586 1053-1807 |
| DOI: | 10.1002/jmri.22079 |
| Popis: | Purpose: To directly compare and study the variability of parameters related to hepatic blood flow measurements using 3 T phase-contrast magnetic resonance imaging (PC-MRI) and Doppler ultrasound (US). Materials and Methods: Nine healthy subjects were studied. Blood velocities and flow rate measurements were performed in the portal vein and the proper hepatic artery. MR studies were performed using a 3 T imager. Gradient-echo fast phase contrast sequences were used with both cardiac and respiratory gating. MR and Doppler flow parameters were extracted and compared. Two methods of calculation were used for Doppler flow rate analysis. Results: Compared to Doppler US, PC-MRI largely underestimated hepatic flow data with lower variability and higher reproducibility. This reproducibility was more pronounced in the portal vein than in the proper hepatic artery associated with poorer velocity correlations. Total hepatic flow values were 1239 ± 223 mL/min and 1595 ± 521 mL/min for PC-MRI and Doppler US, respectively. Conclusion: Free-breathing PC-MRI can provide reliable noninvasive measurement of hepatic flow parameters compared to Doppler US. The MR technique could help to improve Doppler flow calculations, thereby allowing standardization of protocols, particularly for applications in disease. J. Magn. Reson. Imaging 2010;31:579–588. © 2010 Wiley-Liss, Inc. |
| Databáze: | OpenAIRE |
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