UNASSIGNED: Data derived from axial CT scan of 250 patients (500 sides) were used for producing algorithm. At top level petro-occipital fissure utilized for recognizing occipital condyle in which hypoglossal canal is located; and, at lower level the distance between the posterior border of the anatomic element (jugular foramen or hypoglossal canal) and the tangent to the anterior bony part is used for producing algorithm.
UNASSIGNED: The mean age of patients was 38.1 ± 19 years. The petro-occipital fissure can be used in all patients for differentiating hypoglossal canal. At lower level the distance between the anterior tangent and the posterior border of the element was significantly lower for hypoglossal canal (P value < 0.001). The distance more than 3.5 mm with sensitivity 83.8% and specificity 97.1% differentiate jugular foramen from hypoglossal canal.
UNASSIGNED: Simple algorithms based on quantitative morphologic features of the jugular foramen and hypoglossal canal can be used with high sensitivity and specificity to distinguish these elements.
■来自250名患者(500侧)的轴向CT扫描的数据用于产生算法。用于识别舌下管所在的枕骨髁的顶层石枕骨裂;和,在较低水平,解剖元件(颈静脉孔或舌下管)的后边界与前骨部分的切线之间的距离用于产生算法。
■患者的平均年龄为38.1±19岁。所有患者均可使用枕骨裂来区分舌下管。在较低的水平下,舌下管的元素的前切线和后边界之间的距离显着降低(P值<0.001)。超过3.5mm的距离区分颈静脉孔与舌下管的敏感性为83.8%,特异性为97.1%。
■基于颈静脉孔和舌下管的定量形态学特征的简单算法可以以高灵敏度和特异性来区分这些元素。