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Preserved context environmental system drawing method based on isosurface

An isosurface and volume rendering technology, applied in the field of image processing, can solve problems such as loss of structural information and blurred target areas, and achieve the effects of simple parameter adjustment, simplified interaction methods, and reduced time required

Active Publication Date: 2010-07-21
冯前进
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Problems solved by technology

[0005] The purpose of the present invention is to provide a volume rendering method based on isosurfaces in medical images to preserve the context environment, which can preserve the structural information related to the region of interest while clearly displaying the region of interest, so as to overcome the complexity caused by sectioning. Loss of interaction and structural information and blurring of target regions in existing methods

Method used

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  • Preserved context environmental system drawing method based on isosurface
  • Preserved context environmental system drawing method based on isosurface
  • Preserved context environmental system drawing method based on isosurface

Examples

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Embodiment Construction

[0021] The following is the specific process of imaging the CT data of a set of heads by adopting the isosurface-based method of preserving the context environment volume rendering of the present invention:

[0022] The data source used in the experiment is the OsiriX website; the GPU is a Quadro FX 1700 graphics card.

[0023] Step 1, read in the CT image, the size of the image is 512×512×330, and use the 3D anisotropic filter to preprocess the input volume data. The preprocessing is performed on the GPU to reduce the noise and the isosurface extraction and gradient The influence of the calculation, after which the volume data is stored as a 3D texture for gray value indexing of the 3D volume data.

[0024] Step 2, such as figure 1 As shown, the spatial position of the ray entering the 3D volume data 1 and passing through the 3D volume data is obtained from the front surface and the back surface of the color cube. In the forward direction, samples are taken along the light ...

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Abstract

The invention provides a preserved context environmental system drawing method based on isosurface, comprising the following steps: (a) storing three-dimensional data as three-dimensional texture data for the gray value index of the three-dimensional data; (b) sampling the three-dimensional data on each ray which enters the three-dimensional data, extracting isosurface coordinate data according to the gray value of a sampling point, and extracting the isosurface coordinate data on the ray; and (c) if the isosurface coordinate data is successfully extracted, continuing sampling subsequent three-dimensional data along the ray direction, and using the isosurface coordinate data and the current sampling point data to carry out image synthesis, or returning to step (b) to continue sampling the three-dimensional data. The method can realize the purpose of clearly displaying a special region of interest and reserving the periphery tissue structure information to obtain the effect similar to sectioning.

Description

technical field [0001] The invention belongs to the technical field of image processing, and in particular relates to an isosurface-based volume rendering method for preserving context. Background technique [0002] Medical imaging equipment generates a large amount of medical data every day. Usually these data are two-dimensional images. It is very difficult for physicians to construct the three-dimensional spatial relationship between the lesion and surrounding tissues based on their own experience from multiple two-dimensional images. The volume rendering (Volume Rendering) visualization method directly reconstructs two-dimensional sequence images into three-dimensional shapes, and doctors can directly observe and analyze lesions from the real three-dimensional space, so volume rendering technology has been widely used in the medical field. [0003] Volume rendering methods often need to process a large amount of data, and personal computers use CPU calculations, which ca...

Claims

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Application Information

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IPC IPC(8): G06T15/00G06T17/40
Inventor 冯前进贠照强陈武凡
Owner 冯前进
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