Department of Anatomy, Research Institute of Medical Science, Konkuk University School of Medicine, Seoul, Republic of Korea.
Anat Rec (Hoboken). 2013 May;296(5):834-9. doi: 10.1002/ar.22664. Epub 2013 Feb 9.
It is generally accepted that the three semicircular canals are set at right angles to each other and the lateral semicircular canal is smaller than the anterior and posterior semicircular canals. Precise knowledge of the size and spatial relationships of the semicircular canals is vital, and so the 40 petrous parts of the temporal bones were scanned by micro-CT at a slice thickness of 35 µm. The micro-CT images were used in reconstructing three-dimensional models of the bony labyrinth using computer software. Various dimensions of the semicircular canals were measured using the software, and statistical analysis was performed. The anterior semicircular canal was slightly wider than the posterior semicircular canal, and their heights were similar. The radius of curvature of the lateral semicircular canal was 20% smaller than those of the anterior and posterior semicircular canals. The angles between the three canals were not exactly 90 degrees: they were 92.1, 84.4, and 86.2 degrees between the anterior and posterior, anterior and lateral, and posterior and lateral semicircular canals, respectively. We obtained high-resolution images of the semicircular canals using three-dimensional reconstruction software, and these were used to precisely measure the angles between the semicircular canals and the area of the distorted circle formed by each semicircular canal.
人们普遍认为三个半规管彼此成直角设置，其中外侧半规管小于前半规管和后半规管。精确了解半规管的大小和空间关系至关重要，因此，我们对 40 个颞骨岩部进行了厚度为 35μm 的微 CT 扫描。使用计算机软件，微 CT 图像可用于重建骨迷路的三维模型。使用该软件测量了半规管的各种尺寸，并进行了统计分析。前半规管略宽于后半规管，其高度相似。外侧半规管的曲率半径比前半规管和后半规管小 20%。三个管之间的角度并非完全为 90 度：在前、后半规管之间、前、后半规管之间和后、外侧半规管之间的角度分别为 92.1、84.4 和 86.2 度。我们使用三维重建软件获得了半规管的高分辨率图像，并使用这些图像精确测量了半规管之间的角度以及每个半规管所形成的变形圆的面积。
