Contrast enhanced computed tomography and reconstruction of hepatic vascular system for transjugular intrahepatic portal systemic shunt puncture path planning

Figure 2 Determination of rotation angle for puncture set. Contrast-enhanced computed tomography image in Figure 1 is rotated 180 degrees, and the angle between the direction given by the extension line that links the two puncture points and direction of the right vein (red arrow) is the rotation angle (α) for the puncture set.