Fig. 1
Flow phantom of the portal vasculature with transjugular intrahepatic portosystemic shunt (TIPS) stent graft. A Cross sectional rendering of the 3D phantom illustrating the design of the flow phantom mimicking the portal vasculature after TIPS implantation. The superior mesenteric vein (SMV) and the splenic vein (SV) serve as inlets. SMV and SV converge to the portal vein (PV), which narrows towards the TIPS tract. The TIPS tract drains into the hepatic vein (Vein) serving as outlet. White arrows indicate the flow direction. B Photograph of the translucent, 3D-printed phantom with the TIPS stent graft (GoreĀ® ViatorrĀ®) placed within the TIPS tract. The covered part of the TIPS stent graft is located within the TIPS tract (arrowhead). The bare part of the TIPS stent is located within the PV (arrow). The phantom was placed in the isocenter of a 3Ā T CMR system. The inlets of the phantom were connected via flexible tubes over two separate flow regulators and flow sensors to two pumps and the system was filled with blood-mimicking fluid