Method for measuring size of three-dimensional reconstruction liver model on basis of improved region growing algorithm

Abstract

The invention discloses a method for measuring the size of a three-dimensional reconstruction liver model on the basis of an improved region growing algorithm. The method includes the steps that seed point selection and growth criteria in a traditional region growing algorithm are improved by means of a quasi-Monte Carlo method, and an abdomen CT image is segmented by means of an improved region growing segmentation method to extract a liver area; a segmented binary image is used for three-dimensional reconstruction to obtain the three-dimensional reconstruction liver model only provided with a surface mesh, and the model is sealed; a regular square bounding box is arranged, the bottommost face of the bounding box is provided with a projection plane, the sizes of pentahedrons defined by a triangle patch on the reconstruction model and a projection projected by the triangle patch on the projection plane in an enclosed mode are calculated, wherein the triangle patch is provided with a normal vector in the positive direction and a normal vector in the negative direction; finally, the algebraic sum of the sizes of the pentahedrons is the size of the liver model. The method can well represent the shape of the liver, and therefore size measurement is effectively carried out on the three-dimensional reconstruction liver model. Besides, the size of a part of the liver can be measured, and measurement precision is high.

Description

technical field [0001] The invention relates to a method for measuring the volume of a three-dimensionally reconstructed liver model based on an improved region growing algorithm, and relates to two technical fields of medical image information processing and computer application technology. The abdominal CT image is mainly segmented according to the processing ability of the computer, and then three-dimensionally reconstructed And to achieve volume measurement. Background technique [0002] Since my country is an area with a high incidence of liver diseases, doctors usually need to obtain relatively accurate liver volume data during the treatment of liver diseases. Liver volume measurement can not only quantitatively evaluate liver size, but also indirectly reflect liver function, which has extensive and important clinical application value. Therefore, the accuracy of preoperative liver volume measurement directly affects the choice of surgical plan. [0003] Since the li...

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Problems solved by technology

[0012] The methods of obtaining volume in medicine involved in the above literature are all indirectly measured for two-dimensional images, and there are certain subjective influencing factors, and the above methods are all for volume measurement of the target as a whole, and cannot be used for local measurement. limitations, and its measurement accuracy needs to be further improved

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