颅底结构螺旋CT影像的三维定量测量  

Quantitative 3D measurements of the skull base by using spiral volumatric CT images

作　　者：张海钟[1] 步荣发[1] 李永海[1] 赵红[2] 赵绍宏[2] 

机构地区：[1]解放军总医院口腔科,北京100853 [2]解放军总医院放射科,北京100853

出　　处：《中华口腔医学杂志》2000年第5期377-380,I030,共5页Chinese Journal of Stomatology

摘　　要：目的　分析健康成人当下颌骨处在正常牙尖交错位时 ,髁突与颅底颈内动脉管外口、颈静脉窝、卵圆孔、棘孔、破裂孔等之间的空间位置关系 ,为术中对其他重要结构的位置评估提供依据。方法　选择健康成人 10 0名 ,在正常牙尖交错位时 ,用螺旋CT扫描、颅底三维影像重建 ,测量各结构间的最短距离和空间角度。 12个定点 ,测量 2 8项距离和空间角度以极坐标表示 ,髁突内缘点为中心点 ,髁突长轴为 0°轴作为参照系。结果　颌下入路能顺利显露髁突内缘点和髁突长轴的方向 ,以此为参照系 ,确定颈内动脉管外口外缘点为 12 0 1± 2 71mm ,5 14± 1 2 2° ,颈静脉窝外缘点为 15 11±2 72mm ,- 5 6 2 7± 14 0 5°。结论　以髁突内缘点为中心点 ,髁突长轴为 0°轴参照系有助于为颌下入路颅底手术的术中定位及颅底解剖教学提供参考。Objective To study the spatial relationships of mandibular condyle and carotid canal, jugular fossa, foramen ovale, foramen spinosum when mandible in normal physical position Methods 100 native adults were examined by spiral volumatric CT The data were transferred to workstation, three-dimensional(3d) cranial base images were reconstructed , 3D measurements were performed by using specific 3d CT landmarks 12 points were defined and 28 distances and angles were measured in the skull base from submandibular viewpoint The internal pole of condyle and the condylar long axis were regarded as the center point and 0° axis in the reference frame Results Submandibular approach provided a clear vision of the internal pole of condyle and condylar long axis The ECC was located at 12 01±2 71 mm, 5 14±1 22°, Jug was located at 15 11±2 72 mm,-56 27±14 05°according to the reference frame Conclusions Quantitative measurements of 3D skull base can be very precise Mandibular approach is easy to show the mandibular condyle The reference frame is helpful to located other important structures of skull base in operation

关 键 词：颅底结构 摄影测量法 螺旋CT 三维定量测量 

分 类 号：R816.1[医药卫生—放射医学]