Non-grid three-dimensional reconstruction method for medical image
A medical image and three-dimensional reconstruction technology, applied in the field of medical image three-dimensional reconstruction, can solve the problems of inability to reflect details, reduced precision, and large amount of data, and achieve the effect of accelerating reconstruction and rendering speed and enhancing fidelity.
Inactive Publication Date: 2011-09-14
SHENZHEN INST OF TECH
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When the divided grid is too small, the amount of data to be processed will be very large and the speed will be slow; and when the divided grid is too large, the accuracy will decrease and the details cannot be reflected
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[0026] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.
[0027] In the present invention, the mode of grid reconstruction is avoided, and the method of direct target point extraction and drawing is adopted to realize fast three-dimensional reconstruction. Such as figure 1 As shown, the implementation process of the non-grid three-dimensional reconstruction method for medical images provided by the embodiment of the present invention is described in detail as follows:
[0028] In step S101, target points are extracted from medical volume data. The target point is a surface point; or, the target point is a point within a limited range of gray values.
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The invention is suitable for the field of medical image three-dimensional reconstruction, and provides a non-grid three-dimensional reconstruction method for a medical image. The method comprises the following steps of: extracting a target point from medical volume data; computing normal vectors corresponding to all target points; and drawing a three-dimensional medical image by utilizing the coordinates of extracted target points and the normal vectors corresponding to the target points, wherein the target points are surface points or the points in a limited grey value range. In the method, a grid reconstruction mode is avoided; and the rapid three-dimensional reconstruction is realized by adopting a direct target point extracting and drawing mode. By adopting the method of direct point drawing, the precision of a pixel of source data is achieved, so that the image of the source data is restored truly. Intermediate graphics primitives such as a triangular plates and the like do not need to be constructed, so that the reconstruction and drawing speed is accelerated greatly; and the fidelity is enhanced obviously.
Description
technical field [0001] The invention belongs to the field of three-dimensional reconstruction of medical images, in particular to a non-grid three-dimensional reconstruction method of medical images. Background technique [0002] At present, the 3D reconstruction of medical images is mainly based on the voxel-based isosurface construction method, which mainly includes the foreign Cuberille method, Marching Cube method and Diving Cube method. These methods reconstruct the surface through triangular slices (surfaces). [0003] The above method of using triangles (surfaces) needs to divide the mesh first, and then construct the triangles. When the divided grid is too small, the amount of data to be processed will be very large and the speed will be slow; and when the divided grid is too large, the accuracy will decrease and the details cannot be reflected. Contents of the invention [0004] In order to solve the above problems, an object of the embodiments of the present inv...
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Inventor 刘飞兵
Owner SHENZHEN INST OF TECH