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目的 通过正常头颅CT图像 ,对枕内隆凸的发育、形态及其临床意义进行研究。方法 选择 30 0 0例正常颅脑CT图像 ,男女各 15 0 0例 ,分 9个年龄组 ,在骨窗上对枕内隆凸进行观察和测量。结果 枕内隆凸最早见于 4个月婴儿 ,随年龄增长而增高 ,枕内隆凸形态分为单峰型、平坦隆起型、梯型和不规则型 ,以单峰型最常见。枕大池蛛网膜囊肿时枕内隆凸可见大的孤形压迹。结论 正常人枕内隆凸高度差异大 ,形态多样 ,枕内隆凸大的弧形压迹是诊断枕大池蛛网膜囊肿的重要征象。
Objective To study the development, morphology and clinical significance of occipital protuberance by using normal cranial CT images. Methods 300 cases of normal craniocerebral CT images were selected. There were 150 male and female patients in each age group. Nine age groups were included in the study. The occipital protuberances were observed and measured on the bone window. Results The occipital protuberance was first seen in 4-month-old infants and increased with age. The occipital protuberances were classified into unimodal type, flat elevated type, trapezoidal type and irregular type, with unimodal type being the most common. Occipital large arachnoid cyst when the pillow can be seen in a large lone arch indentation. Conclusions The height of occipital protuberance in normal people varies widely and varies in shape. The large arc-shaped depressions in the occipital protuberance are the important signs of diagnosis of arachnoid cysts in the cistern of the pillow.