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. Author manuscript; available in PMC: 2015 Apr 1.
Published in final edited form as: Radiology. 2014 Oct 15;275(1):245–254. doi: 10.1148/radiol.14140973

Figure 4.

Figure 4

Bland-Altman plots showing the comparison of spiral vs. Cartesian 4D flow, Cartesian vs. cine 2D and spiral vs. cine 2D in the portal vein measured in 10 subjects. Bland Altman limits of agreement are given in Table 2. The velocity and area bias observed for cine 2D phase contrast vs. 4D flow techniques may be due to imperfect plane alignment (which does not affect total flow). Average portal venous flow was 10.6, 8.8 and 8.6 mL/s using Cartesian 4D flow, spiral 4D flow and cine 2D phase contrast respectively.