Reisser C, Schubert O, Forsting M, Sartor K
Department of Otorhinolaryngology, University of Heidelberg Medical School, Germany.
Am J Otol. 1996 May;17(3):473-9.
Our purpose was to demonstrate the application of helical computed tomography (CT) for computer graphics of the normal temporal bone with special regard to inner ear structures. Three-dimensional reconstruction of temporal bones was performed from helical CT data on 41 patients with various otologic diseases. Image postprocessing was carried out on an independent work station. In contrast to former surface-rendered three-dimensional visualizations of the temporal bone, a volumetric-rendering algorithm was used. This technique allows automated segmentation, thresholding, and simultaneous visualization of different planes (cube-cutting) in near-real time. We were able to demonstrate the three-dimensional display of the labyrinth during clinical routine. Anatomic details (internal auditory canal, cochlea, vestibulum, semicircular canals, distal part of the vestibular aqueduct, complete ossicular chain, fallopian canal, internal carotid canal) were comprehensively demonstrated by interactive segmentation or thresholding. Difficulties were found in three-dimensional delineation of the complete vestibular and cochlear aqueduct, as well as the modiolus. Initial experience with an advanced helical CT-based three-dimensional display showed excellent images of temporal bone anatomy. Validation studies with correlative histologic sections and surgical dissections remain to be done.
我们的目的是展示螺旋计算机断层扫描（CT）在正常颞骨计算机图形学中的应用，尤其关注内耳结构。对41例患有各种耳科疾病的患者的螺旋CT数据进行了颞骨的三维重建。图像后处理在独立工作站上进行。与以前颞骨的表面渲染三维可视化不同，使用了容积渲染算法。该技术允许自动分割、阈值处理，并能近乎实时地同时显示不同平面（立方切割）。我们能够在临床常规操作中展示迷路的三维显示。通过交互式分割或阈值处理全面展示了解剖细节（内耳道、耳蜗、前庭、半规管、前庭导水管远端、完整听骨链、面神经管、颈内动脉管）。在完整前庭和耳蜗导水管以及蜗轴的三维描绘中发现了困难。基于先进螺旋CT的三维显示的初步经验显示了颞骨解剖结构的出色图像。仍有待进行与相关组织学切片和手术解剖的验证研究。
