Accelerated algorithm for 3D intestine Volume Reconstruction base on VTK

3D Volume Reconstruction of the intestine is a crying need to improve the accuracy of disease detection and treatment. This paper adopts the Visualization Toolkit (VTK) combined with VC++ IDE to reconstruct 3D intestine CT images. Ray-Casting is a traditional algorithm for 3D Volume reconstruction of medical images, but the calculation is very large and the speed of creating images is so slow-footed. To overcome the drawback of large quantity of computation, firstly, in order to effectively reduce the amount of redundant data of reconstruction, segment the intestinal part which we interest in by using Region Growing method, then, at the step of image synthesis, set an appropriate threshold of opacity, when the opacity is greater than the threshold value, that means the sampling points behind will not contribute to the color value of current pixel, so terminate the calculation of synthesis, and finally, quickly rebuild 3D intestine. Compared with the traditional algorithm, the accelerated algorithm achieves great enhancement in efficiency, and without significantly reducing image quality.