Three-dimensional reconstruction of paracentesis approach in transjugular intrahepatic portosystemic shunt.

To establish a digital transjugular intrahepatic portosystemic shunt (TIPS) model and provide morphological data for radiological diagnosis and interventional radiology to reduce portal vein pressure, 400 serial sectional images from the internal jugular vein superior margin to the lower edge of the liver were chosen from the Chinese Visible Human dataset. Surface and volume reconstructions were performed using 3D-DOCTOR 3.5 software on an ordinary personal computer. Volume and surface renderings were employed to perform data segmentation and image edge detection for reconstruction of the internal jugular vein, brachiocephalic vein, superior vena cava, heart, inferior vena cava, hepatic vein, and portal vein for computerized 3D reconstruction of the TIPS pathway and construction of a 3D visible model of different structures along it. The model can also display pathway and distribution characteristics and interactively show the spatial structural relationships between intrahepatic venous lines from any position and angle, plus complete data acquisition for any range and angle for 3D reconstruction with stereopsis and measurements using any visualization platform. The digital reconstruction of the TIPS pathway correctly reflected the complicated anatomic structural characteristics and spatial adjacency relationships between intrahepatic venous lines, providing a reference 3D morphology for image diagnostics and interventional TIPS therapy.