Pericardium segmentation method based on CT sequence and method for roughly positioning pericardium region from pericardium sequence central layer slice

Abstract

The invention discloses a pericardium segmentation method based on a CT sequence and a method for roughly positioning a pericardium region from a pericardium sequence central layer slice, belongs to the field of medical image processing, and aims to improve the pericardium positioning accuracy. The method comprises the steps of: in the central layer, removing an interference tissue region throughthreshold processing, reserving a communication region containing pericardium, and obtaining a binary image containing pericardium; calculating the binary image to obtain the approximate circle centerand radius of the pericardial central layer slice; the circle center and the radius of the central layer slice are equivalent to the sphere center and the radius of the pericardial sphere; determining the area boundary of the whole pericardium body, roughly positioning the whole pericardium area, the effect is that the interference of peripheral tissues on the pericardium is reduced through the specific judgment of the single-layer characteristics of the sequence, and the accurate pericardium segmentation is carried out by combining the three-dimensional characteristics of CT to obtain the final pericardium segmentation sequence containing blood vessels.

Description

technical field [0001] The invention belongs to the field of medical image processing, and in particular relates to a method for segmenting the pericardium based on a CT sequence and a method for roughly locating the pericardium region from the central slice of the pericardium sequence. Background technique [0002] The heart is an important organ of the human body. Its function is to push blood through the blood vessels in the circulatory system. In recent years, the number of patients with cardiovascular diseases such as coronary heart disease has been increasing year by year, and they all rely on cardiovascular CT (computerized tomography) or cardiac angiography for diagnosis in the early stage. The structure of the heart is complex, the head end of the heart tube is connected to the artery, and the tail end is connected to the vein. The pericardial sequence obtained by CT equipment is interfered by the lungs, liver, bone tissue, diaphragm, air bubbles, etc. The pericard...

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Problems solved by technology

Pericardial tissue range is different, making it difficult to locate the pericardium

Moreover, there is no fixed threshold for pericardial tissue, and the CT value after angiography is relatively high. It is difficult to accurately segment the pericardium with a single segmentation method.

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