Woolson S T, Dev P, Fellingham L L, Vassiliadis A
Clin Orthop Relat Res. 1986 Jan(202):239-48.
An automatic computer technique was designed to produce three-dimensional (3D) images of bony anatomy on a cathode ray tube (CRT) from computerized tomography (CT) data. The authors transferred CT scan data of a cadaver and 11 patients to a computer system via magnetic tape. An automatic edge extraction algorithm generated an outline of bone specified by a range of CT numbers for each scan slice. These outlines were stacked in the computer and various graphics options used to represent the 3D anatomy of bone on a high-resolution CRT screen. The 3D image data were interfaced with a three-axis computer numerically controlled milling device to produce solid models of these bone images. Comparison of the dimensions of the solid models of the femur, hemipelvis, and femoral medullary canal to the actual cadaver specimen demonstrated that the models were accurate in size to within 1-3 mm. These 3D images and solid models will be helpful for preoperative diagnosis, surgical planning, and customized prosthesis manufacture in complex orthopaedic cases.
设计了一种自动计算机技术，用于根据计算机断层扫描（CT）数据在阴极射线管（CRT）上生成骨骼解剖结构的三维（3D）图像。作者通过磁带将一具尸体和11名患者的CT扫描数据传输到计算机系统。一种自动边缘提取算法为每个扫描切片生成由一系列CT数值指定的骨骼轮廓。这些轮廓在计算机中进行叠加，并使用各种图形选项在高分辨率CRT屏幕上呈现骨骼的3D解剖结构。3D图像数据与三轴计算机数控铣削设备相连接，以制作这些骨骼图像的实体模型。将股骨、半骨盆和股骨髓腔的实体模型尺寸与实际尸体标本进行比较，结果表明模型尺寸精确到1至3毫米以内。这些3D图像和实体模型将有助于复杂骨科病例的术前诊断、手术规划和定制假体制造。
