Hepatic vascular flow measurements by phase contrast MRI and doppler echography: A comparative and reproducibility study
Thierry Yzet,Roger Bouzerar,Jean-Dominique Allart,Fabien Demuynck,Cécile Legallais,Brice Robert,Hervé Deramond,Marc-Etienne Meyer,Olivier Balédent +8 more
TLDR
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).Abstract:
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.read more
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References
More filters
Journal ArticleDOI
Measurement of blood flow by ultrasound: accuracy and sources of error.
TL;DR: The Doppler methods are capable of good absolute accuracy when suitably designed equipment is used in appropriate situations, with systematic errors of 6% of less; there are, however, considerable random errors.
Journal ArticleDOI
Cardiovascular Flow Measurement with Phase-Contrast MR Imaging: Basic Facts and Implementation
TL;DR: With phase-contrast imaging, the overall error in flow measurement can be reduced to less than 10%, an acceptable level of error for routine clinical use.
Journal ArticleDOI
Mechanism and role of intrinsic regulation of hepatic arterial blood flow: hepatic arterial buffer response
TL;DR: Hepatic parenchymal cell metabolic status does not control the hepatic arterial blood flow, and the mechanism of the arterial buffer response seems to depend on portal blood flow washing away local concentrations of adenosine from the area of thearterial resistance site.
Journal ArticleDOI
Accuracy of phase‐contrast flow measurements in the presence of partial‐volume effects
TL;DR: It is shown that limited resolution (partial‐volume effect) is the major obstacle to accurate flow measurement for both laminar and plug flow and at least 16 voxels must cover the cross section of the vessel lumen to obtain a measurement accuracy to within 10%.
Journal ArticleDOI
Hepatic flow parameters measured with MR imaging and Doppler US: correlations with degree of cirrhosis and portal hypertension.
Laurence Annet,Roland Materne,Etienne Danse,Jacques Jamart,Yves Horsmans,Bernard E. Van Beers +5 more
TL;DR: Hepatic flow parameters measured with MR imaging correlate with the severity of cirrhosis and portal hypertension and Doppler US parameters are only weakly correlated with portal pressure.