Abstract
Spinal pathology treatment has become an urgent issue to be solved. How to effectively prevent and treat spinal pathology has become a research hotspot in the field of surgery. Aiming at the problem of too long volume rendering time caused by the trilinear interpolation sampling method in the reconstruction and visualization of the vertebra 3D model, an improved ray projection algorithm is proposed to quickly reconstruct a 3D vertebra model from medical CT vertebra images. This method first classifies CT data, assigns corresponding color values and opacity transfer functions to different types of data, and then uses inverse distance-weighted interpolation (IDWI) sampling to replace the trilinear interpolation sampling method for the voxel where the sampling point is located to accelerate the interpolation operation. The color value and opacity of the sampling points are obtained, and finally, the attributes of all the sampling points are synthesized and calculated to obtain the final rendering effect, and the reconstruction of the three-dimensional vertebra model is completed. Experimental results show that the proposed method not only can obtain higher quality rendered images but also has a certain improvement in rendering speed compared with traditional algorithms.
Highlights
Nowadays, spine-related diseases are a major problem in modern human society
Pedicle screw placement is a relatively mature medical method for spinal pathology, and three-dimensional reconstruction of vertebrae is the premise of preoperative simulation and quantification. e three-dimensional vertebral model obtained by medical image visualization can provide more realistic anatomical structure for doctors, so as to help doctors accurately diagnose the disease and design treatment plan, which has important clinical practical value
Medical image visualization [1] is the human body information obtained by digital imaging technology that is intuitively expressed as three-dimensional effect on the computer, so as to provide structural information that cannot be obtained by traditional means
Summary
Spine-related diseases are a major problem in modern human society. Modern clinical medicine points out that spinal pathology has become an urgent problem to be solved. As a classical method of volume rendering technology, ray casting algorithm has a wide range of applications in the field of 3D reconstruction visualization of medical images, but its rendering speed is slightly insufficient [2]. E acceleration method based on software type does not rely too much on the development of hardware, but improves from the angle of algorithm, which has high flexibility. This kind of method has some problems, such as too high. In order to speed up volume rendering and improve the quality of reconstruction, we proposed a ray casting algorithm based on inverse distance-weighted interpolation sampling to realize the 3D visualization of the vertebral CT image. The final color of each pixel is obtained by synthesizing the color value and opacity of all the sampling points, and the three-dimensional reconstruction of the vertebral image is realized
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