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目的:利用低剂量多层螺旋CT儿童序列及多平面重组(MPR)技术探索儿童鼻咽部气道大小及形态。资料及方法:回顾性性分析2005.05～2008.08来我院检查鼻及鼻咽部儿童的CT扫描图像,选择符合条件的3～14岁患儿73例,根据儿童鼻咽部腺样体生理特点分两组,一组3～7岁,二组8～14岁,分析儿童鼻咽部A值、N值及A/N值,总结鼻咽腔形态学特点。结果:3～14岁(两组)儿童正常鼻咽部气道失状位均呈镰刀形,周围脂肪间隙清晰,后缘光整连续;一组及二组A值均数分别为9.23±4.85mm、9.56±4.74mm;N值均数分别为19.23±3.5mm、21.5±4.9mm;两组A值及N值均数间没有统计学差异;A/N值范围一组为0.2～0.58,二组0.21～0.6。结论:3～14岁健康儿童鼻咽腔失状位呈弓向上的镰刀形,边缘光整,周围脂肪间隙清晰,A/N≤0.6。
OBJECTIVE: To explore the nasopharyngeal airway size and morphology in children using low-dose multislice CT multi-slice spiral array (MPR) technique. Materials and Methods: Retrospectively analyzed the CT scan images of nasal and nasopharyngeal children from 2005.05 to 2008.08 in our hospital. According to the physiological characteristics of children’s nasopharyngeal adenoids, 73 eligible children aged 3-14 years Two groups, a group of 3 to 7 years old, two groups of 8 to 14 years old, analysis of children nasopharyngeal A value, N value and A / N value, summarize the morphological characteristics of the nasopharyngeal cavity. Results: The normal nasopharyngeal airway atrophy in children aged 3 to 14 years (all two groups) showed a sickle shape with a clear clearance around the lip and a continuous trailing edge smoothing. Mean values of A in group A and group A were 9.23 ± 4.85 mm and 9.56 ± 4.74mm, respectively. The average values of N were 19.23 ± 3.5mm and 21.5 ± 4.9mm respectively. There was no significant difference between A and N values in both groups; A / N ranged from 0.2 to 0.58, The second group 0.21 ~ 0.6. CONCLUSIONS: Nasopharyngeal aphasia in healthy children aged 3-14 years showed a bow-shaped sickle with rounded edge and a clear clearance around fat with A / N≤0.6.