尺神经功能束组走行模式的三维重建

目的 在组织学切片基础上，应用计算机三维成像技术，重建尺神经功能束组走行的三维图象，以期指导临床臂丛与尺神经损伤后的显微修复，为臂丛神经根性撕脱伤后手内肌功能的恢复提供必要的形态学基础。方法 制作尺神经连续断面组织切片，AchE组织化学染色，将切片转化为数字图象，人工判断功能束组性质，图形处理软件配准后，采用体数据场轮廓线表面重建方法，应用VC语言编制三维图象存储构建程序，在程序中重建尺神经功能束组走行的三维图象。结果 在程序中实现了尺神经功能束组走行的三维重建。对重建的各神经功能束的外表面进行三维显示，实现人机交互的任意三维旋转、任意断面切割。通过对感兴趣的显示对象(神经干和各束组)的选择，可以在同一三维空间同时显示任意神经功能束组的立体结构，结果反映出它们的在空问位置上的结构、毗邻关系和走行。通过与显微解剖结果对照，发现其显示图象与解剖结果基本吻合。结论 构建的尺神经功能束组的三维图象，能较真实的反映束组的走行分布情况，对临床医生理解神经内部结构，设计手术方案和在术中对照束组的分布方位调整手术方法有积极的作用。

Three-dimensional imaging reconstruction of the ulnar nerve functional fascicular groups

Objective To reconstruct on the basis of histological study the computerized 3D ima ges of the fascicular groups of ulnar nerve,which can be used to guide the microsurg ical repair of injuries of brachial plexus and ulnar nerve and to provide morpholog ical evidence for the functional rec overy of intrinsic muscles of hand after root avulsion of brachial plexus.Methods The successive AchE-staining histo logical cross-sections were made.T he photos of the sections were transformed into digital information and sto red in the computer.Different functional fas-cicular groups were distinguished a nd marked on each section.The topographic database was analyzed by image pro-cessing software,with the support o f OpenGL three dimensional graphic l ibrary.3D images of the fascicular g roups of ulnar nerve were reconstructed usin g the contour-based surface constru ction method in the program written w ith VC language.Results The 3D images of the individual external surface of the reconstructive fa scicular groups were displayed and the human-computer in teraction was realized by performin g the arbitrary rotation and the rand om cross-section.By selecting the int erested object,the spatial structu re of any fascicular group could be di splayed in the same space simultaneously.Compare d with the result of microanatomy,th e 3D shape could truly reflect the str ucture,adjacent relationship and arrangem ent of fascicular groups in the ulnar nerve trunk.Conclusions Since the re-constructive 3D images can truly reflect the arrangement and distribution of the functional fascicular grou ps,they will have positive effects on understanding the internal structure of ulnar nerve,designing operative procedur e and adjusting operative method for surgeons.