摘要目的 利用可视化开发包(VTK)将计算机断层扫描(CT)图像合成三维立体图像,以利于更好地制定肝癌患者的治疗方案.方法 建立基于VC6.0平台上的VTK可视开发环境,获取患者的DICOM格式的CT图像,采用VTKfilter滤波器和拉普拉斯锐化模板对图像进行滤波、增强等预处理.利用光线投影Ray-Casting算法对图像进行三维重建.结果 该方法可生成效果较好的三维图像,其分辨率较高,图像重建速度快,且可进行切割、旋转、缩放等功能.结论 基于VTK的光线投影算法可用于对人肝组织的三维重建,有利于医生直观地观察病变组织的形状和位置,为诊断和治疗提供依据.

abstractsObjective Turn the CT sectional image into three-dimensional imaging based on VTK, in or-der to make better treatment programs for patients with liver cancer. Methods Establish visualization toolkit (VTK) visualization development environment based on VC6.0, obtain patient's CT images in DICOM format, use VTK filter and Laplacian sharpening template for pre-treatment of the images, and then use Ray-Casting algo-rithm for three-dimensional reconstruction. Results We can get three-dimensional images with higher resolu-tion and faster imaging speed through this method, which can also be cut, rotated and zoomed. Conclusion Ray-Casting algorithm based on VTK can be used for the three-dimensional imaging of human liver. With the as-sistance of three-dimensional images, doctors can detect the location of diseased tissue more easily and observe the shapes of diseased tissue intuitively.