Hepatic vascular flow measurements by phase contrast MRI and doppler echography: A comparative and reproducibility study
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Cites background from "Hepatic vascular flow measurements ..."
...All techniques, however, have specific limitations such as ionizing radiation and possible side effects of contrast application (112), limited anatomical coverage (113), poor observer variability (114) or invasiveness (115)....
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289 citations
Cites background from "Hepatic vascular flow measurements ..."
...Based on the available information, and the knowledge thatDoppler flow studies are subject to high variationbetween and within individuals,([247,248]) it is difficult, at this stage, to describe the magnitude and significant of changes in maternal hepatic blood flow....
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152 citations
84 citations
Cites background from "Hepatic vascular flow measurements ..."
...Yzet and colleagues reported that PC-MR was a more reliable measure of hepatic blood flow compared to Doppler ultrasound with lower variability and higher reproducibility [18]....
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...Recent advances in magnetic resonance imaging (MRI) have made it possible to measure multiple parameters associated with structural [17], blood flow [18] and perfusion [19] changes in the liver in a single scan session....
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74 citations
References
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"Hepatic vascular flow measurements ..." refers background in this paper
...It has been reported earlier that the Doppler technique tends to overestimate peak velocities (17,18)....
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449 citations
"Hepatic vascular flow measurements ..." refers background in this paper
...These parameters could have a prognostic role in patients with cancer or cirrhosis (1,2)....
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295 citations
"Hepatic vascular flow measurements ..." refers background in this paper
...Several explanations can be proposed for this difference: the size of the hepatic artery induces velocity undersampling in the whole vessel, the partial volume effects at the vascular wall caused by the lack of spatial resolution (24,25), artery motions, and the encoding velocity ideally selected at best to 25% above the maximum velocity value (26)....
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276 citations
"Hepatic vascular flow measurements ..." refers background or methods in this paper
...Haag et al (15), followed by Annet et al (11), then calculated mean blood flow velocity by multiplying the time average velocity by a factor of 0.5 in patients, especially with cirrhosis, with no detailed discussion of the underlying assumptions....
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...A second estimate (QD2) of portal blood flow was extracted from Haag et al (15) and Annet et al (11): QD2 1⁄4 0....
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...In the present study, the method of Moriyasu et al (6) and its alternative were used to calculate QD1 and the formula used by Haag et al (15) and Annet et al (11) was used to calculate QD2 in the portal vein and hepatic artery....
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...Finally, Annet et al (11) established a correlation between portal venous pressure and parameters measured by perfusion MRI, which was not the case with Doppler parameters....
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...Haag et al (15), followed by Annet et al (11), then calculated mean blood flow velocity by multiplying the time average velocity by a factor of 0....
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