目的以冷冻切片图像序列为数据源,重建骨组织曲线曲面模型。方法首先通过平移、旋转和缩放等几何变换对冷冻切片图像序列进行配准,再依次对每张冷冻切片图像进行分割处理;处理每张冷冻切片时,在分割对象的边界上交互选择少量的特征点,采用三次有理B样条将系列特征点拟合成封闭曲线,利用样条曲线控制点影响的局部性性质,调整曲线的控制多边形,使其与目标骨组织边界吻合。分割完成后的每条曲线以骨组织名称、方位和切片编号作为索引加入曲线数据库。结果提出从中国数字化可视人体数据集中获取骨组织曲面几何模型的完整技术路线,并建立完善的曲面数据库。结论从冷冻切片图像序列中重建骨组织曲线曲面模型的技术路线可行、有效。

Objective With cryosectional images sequence as data source, bone structure curve and surface modelsare reconstructed. Methods Registration is firstly applied to all the cryo-sectional images through translation, rotationand scaling transforms. Segmentation is then performed on every single image. Characteristic boundary points areselected and fitted into cubic Nurbs curves. B-spline local modification property is utilized to adjust the control polygon forthe fitted curve to better approximate the bone structure boundary. All the segmented curves are added to the curvedatabase with bone name, orientation and cryo-sectional image number combined into an index. Results A comprehensivetechnical solution to bone structure curve and surface modeling from cryo-sectional images is presented, and surfacemodels database is established. Conhclusion The technical solution to reconstruct curve and surface models fromcryo-sectional images is feasible and effective.