Topology analysis assistance method used for three-dimensional reconstruction of abdominal CT images

Abstract

The invention relates to a topology analysis assistance method used for three-dimensional reconstruction of abdominal CT images. The topology analysis assistance method includes the following steps: image scanning and screening; non-rigid matching; matching probability optimization; topology continuity analysis; and optimization of topology property retention. The method of the invention can obtain abdominal CT three-dimensional-reconstruction images avoiding individual differences on organ shape and anomalies on positions, helps a surgeon in more accurately evaluating a tumor position and identifying a variant anatomical structure, and has important significance for optimizing a surgery process and ensuring a surgery safety process.

Description

technical field [0001] The invention belongs to the fields of topological analysis, image segmentation, image processing, imaging and the like, and relates to a topological analysis auxiliary method for three-dimensional reconstruction of abdominal CT images. Background technique [0002] Laparoscopic radical gastrectomy has the advantages of less trauma, less postoperative pain, less impact on the body’s immune function, faster recovery of gastrointestinal function, and shorter hospital stay. The effect of laparotomy is equivalent, so it is recognized by more and more surgeons. However, in laparoscopic radical gastrectomy, it is more difficult to judge tissues and blood vessels due to the loss of the sense of touch in traditional surgery; in addition, laparoscopic surgery cannot obtain a global view like laparotomy, which will make the abdominal cavity more difficult. It is difficult to identify the anatomy of the perigastric vessels under the microscope. Therefore, how t...

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Problems solved by technology

The three-dimensional reconstruction technology of tissues and organs based on computed tomography has played an increasingly important role in the fields of orthopedics and neurosurgery since it was proposed in the 1970s. However, the reconstruction technology of abdominal tissue has obvious shortcomings: on the one hand The tissues that can be reconstructed are limited. At present, there are only relatively mature reconstruction techniques for solid organs and abdominal blood vessels, but the effect is not good for hollow organs. On the other hand, the effect of reconstruction is limited by the original CT data. In the case of diseases, such as peritonitis, peritoneal effusion, abdominal space-occupying lesions, severe intestinal adhesions, etc., will interfere with the original CT data to a certain extent, and the current reconstruction methods are difficult to achieve the desired effect

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