摘要目的 借助MRI图像分析患儿副鼻窦的最初气化时间,为副鼻窦相关疾病的诊疗提供影像学信息.方法 回顾性分析2009年1月至2011年2月温州医学院附属第二医院行头颅MR检查的799例患儿头部平扫MRI图像,男430例、女369例,年龄0～15岁.观察各组副鼻窦的气化时间.结果 筛窦发育气化最早,1个月内气化率100％ (46/46),所有观察对象中未发现尚未气化者.其次为上颌窦,第1个月时气化率为45.7％ (21/46),在7～12个月间气化率达97.8％(45/46).蝶窦在第4个月可见气化,在1～2岁间气化率为86.0％(43/50).额窦最初气化时间最晚,在1～2岁间气化率为8％(4/50),14 ～15岁气化率增至97.7％ (42/43).结论 MRI能用于观察患儿副鼻窦的气化情况.患儿各组副鼻窦的最初气化时间较以往文献报道的早.

abstractsObjective To evaluate the onset of initial pneumatization of paranasal sinuses with magnetic resonance imaging (MRI) and provides references in the diagnosis and treatment of pediatric paranasal sinuses disease.Methods The MRI images of paranasal sinuses were retrospectively reviewed for 799 children of 0 month to 15 years old and the first pneumatization time of paranasal sinuses were analyzed.Results The ethmoidal sinuse was the first pneumatized in 100％ (46/46)of newborn children.And 45.7％ (21/46)of maxillary sinuse showed penumatization during the first month of life and 97.8％ (45/46)were penumatized at 7-12 months.The penumatized sphenoid sinuse was first identified as early as 4 months.And 86％ (43/50) were penumatized from 1 to 2 years old.Frontal sinuse was the last pneumatized paranasal sinuse.And 8％ (4/50) of frontal sinuse were penumatized at 1-2 years old and 97.8％ (42/43) showed pneumatization at 14-15 years old.Conclusion MRI may be used to observe the pneumatization of paranasal sinuses.The initial pneumatization time of paranasal sinuses is earlier than previously described.