人镫骨足板的高分辨率X射线计算机断层扫描
High-resolution X-ray computed tomographic scanning of the human stapes footplate.
作者信息
Hagr Abdulrahman A, Funnell W Robert J, Zeitouni Anthony G, Rappaport Jamie M
机构信息
Department of Otolaryngology, McGill University, Montreal, Quebec.
出版信息
J Otolaryngol. 2004 Aug;33(4):217-21. doi: 10.2310/7070.2004.03075.
OBJECTIVES
The mechanical behaviour of the footplate and its annular ligament depends critically on their shape and orientation in the oval window, but accurate measurements have been difficult to make owing to their small size. Our aims are to visualize the footplate at high resolution and understand its dynamics.
METHODS
The human cadaver stapes footplate was dissected, and very high-resolution x-ray computed tomographic (CT) scans, with voxel sizes from 4 to 8 pm, were performed. Locally developed software was used to reconstruct the images.
RESULTS
The data permit us to explore minor details of shape and orientation. The footplate looks like a footprint, and the annular ligament has variable thickness, with a cleft (groove) in its anterior attachment to the oval window. The CT data also permit us to create a three-dimensional finite-element model that can simulate footplate motion.
CONCLUSIONS
The results obtained lead to further understanding of the mechanical behaviour of the footplate and the annular ligament.
目的
镫骨足板及其环状韧带的力学行为关键取决于它们在椭圆窗中的形状和方向，但由于其尺寸小，难以进行精确测量。我们的目的是高分辨率可视化足板并了解其动力学。
方法
解剖人类尸体的镫骨足板，并进行体素大小为4至8微米的超高分辨率X射线计算机断层扫描（CT）。使用本地开发的软件重建图像。
结果
这些数据使我们能够探究形状和方向的细微细节。足板看起来像一个脚印，环状韧带厚度可变，其前部附着于椭圆窗处有一个裂隙（凹槽）。CT数据还使我们能够创建一个可以模拟足板运动的三维有限元模型。
结论
所获得的结果有助于进一步了解足板和环状韧带的力学行为。
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