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Variability of splanchnic blood flow measurements using MR velocity mapping under fasting and post-prandial conditions - comparison with echo-Doppler
- Source :
- Journal of Hepatology. 26:298-304
- Publication Year :
- 1997
- Publisher :
- Elsevier BV, 1997.
-
Abstract
- The aim was to study the reproducibility of magnetic resonance velocity mapping, when measuring portal vein and superior mesenteric artery blood flow, under fasting and post-prandial conditions. Magnetic resonance flow measurements for the portal vein were compared with echo-Doppler measurements in the right portal vein.Eight healthy volunteers were studied on two occasions, separated by 1 week. Blood flow in the portal vein and superior mesenteric artery was measured repeatedly under basal fasting conditions. On one occasion measurements were also made after a meal. Every magnetic resonance measurement was followed by an echo-Doppler measurement in the right portal vein. Correlations between flow values were calculated using Pearson's r. Variability components were assessed using ANOVA.Intra-individual variability was approximately 7% for portal vein flow measurements using magnetic resonance velocity mapping. This variability did not increase after 1 h, 1 week and after a meal. Values of flow measured in the portal vein and superior mesenteric artery using magnetic resonance velocity mapping correlated well (r = 0.80, p0.001). Fasting portal flow as measured with magnetic resonance velocity mapping was 1.2 l/min (range 0.96-1.6 l/min). Variability in echo-Doppler measurements was comparable to the variability of magnetic resonance velocity mapping, and flow measurements obtained with the two techniques correlated well (r = 0.74; p0.001).Magnetic resonance velocity mapping accurately measures blood flow in the portal vein with low variability and should be preferred when absolute flow values are necessary. Echo-Doppler measurement of the right portal vein has a low variability and can be used to study changes in flow.
- Subjects :
- Adult
Male
medicine.medical_specialty
Velocity mapping
medicine.artery
medicine
Humans
Splanchnic Circulation
Superior mesenteric artery
Echo doppler
Reproducibility
Hepatology
medicine.diagnostic_test
business.industry
Ultrasonography, Doppler
Magnetic resonance imaging
Fasting
Blood flow
Postprandial Period
Circulatory system
cardiovascular system
Radiology
Splanchnic
Nuclear medicine
business
Blood Flow Velocity
Magnetic Resonance Angiography
Subjects
Details
- ISSN :
- 01688278
- Volume :
- 26
- Database :
- OpenAIRE
- Journal :
- Journal of Hepatology
- Accession number :
- edsair.doi.dedup.....e5465732bee6b50a464c3446edf202d2