Fig. 6

Correlation of 4D flow CMR- and 2D PC CMR-derived flow velocities. Preset flow rates were increased from 0.8 to 2.8 l/min and velocity measurements were performed using velocity encoding both at 1 m/s (black crosses) and at 2 m/s (red squares). Flow measurements were performed at indicated levels. 4D flow CMR-derived velocities were significantly correlated with 2D PC CMR-derived flow velocities at all vascular levels and within the stent graft (all r ≥ 0.958 and all p ≤ 0.024). At velocity encoding of 1 m/s, velocity measurements were excluded if velocities exceeded velocity encoding and caused aliasing artifacts. At velocity encoding of 2 m/s, aliasing did not occur. SMV  superior mesenteric vein, SV  splenic vein, PV  portal vein, TIPSb  bare part of the stent, TIPSp  portal sided third of the stent, TIPSm  middle third of TIPS stent, TIPSv  venous sided third of the stent