Segmented 5 versus nonsegmented flow quantitation - Comparison of portal vein flow measurements

RATIONALE AND OBJECTIVE. Times of acquisition, mean velocities, mean flows, and their respective standard deviations provided by segmented and nonsegm ented flow quantifications (FQ) were compared in the main portal veins of t en healthy adults. METHODS. The segmented FQ performed five phase-encoding lines per segment, The authors successively applied the two electrocardiogram-triggered techni ques in the same slice perpendicular to the portal Bow direction, Their mea surements were compared in particular by means of the statistical analysis proposed by Bland and Altman, RESULTS. The segmented 5 FQ reduced the acquisition time by two compared wi th the nonsegmented FQ, The mean velocity and mean flow values of the two t echniques were not significantly different, The standard deviations were si milar. CONCLUSIONS. The segmented 5 FQ showed its major advantage in the portal ve in: the acquisition time was reduced without any loss of accuracy or any un certainty enhancement.