Hepatic portal vein tree modeling method and system thereof

Abstract

The invention discloses a hepatic vein vascular tree modeling method and a system thereof. The method comprises the following steps: using a liver model to obtain a liver image, and utilizing the multi-scale filtration method to strengthen a blood vessel; cutting a hepatic vein; extracting a central line of the hepatic vein; detecting and removing a link in the central line; and utilizing OSG / VTKto rebuild the hepatic vein vascular tree after pruning. The system comprises an image acquisition module, a blood vessel strengthening module, a blood vessel cutting module, a vascular tree central line extracting module and a vascular tree rebuilding module. The invention improves similarity functions in the filtering process, analyzes the characteristics of the ring and adopts corresponding unlinking methods for different links; and utilizes the relation of radius of blood vessel and the branch length when pruning. The invention effectively enhances the hepatic vein, improves the contrast between the blood vessel and liver parenchyma, and can extract more than five class branches, effectively unlink and prune the central line of the hepatic vein, rebuild the hepatic vein vascular tree and directly display the branches of the heptatic vein.

Description

technical field [0001] The invention belongs to the field of medical image processing and application, and in particular relates to a method for modeling a hepatic portal vein vascular tree and a system thereof. This method can effectively model the vascular tree of the hepatic portal vein, reconstruct the vascular tree of the hepatic portal vein, and visually display the branches of the hepatic portal vein. Background technique [0002] Multi-slice spiral CT portography (MSCTP) can clearly display the vascular structure of the internal organs of the liver, and can accurately locate liver lesions. It is an important basis for the diagnosis and operation of liver diseases. The modeling of the hepatic portal vein vascular tree of MSCTP is a basis for liver surgery, which can visually display the branches of the portal vein. The structural analysis of blood vessels, liver image-guided surgery, and interventional therapy operations are all based on vascular modeling. . [0003...

AI Technical Summary

Problems solved by technology

Although topology refinement can well preserve the structural information of the target, when there is a ring structure in the blood vessel, this method requires post-processing to remove the ring structure

At present, the most widely used method is the ring detection and ring removal method based on the source distance field (Distance from one Source point, DFS) proposed by Palágyi K et al.; however, using DFS ring removal often destroys the normal structure of blood vessels

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