目的：采用高分辨多排螺旋CT研究鼻中隔和中鼻甲解剖变异，并评价它们对前组鼻副窦引流通道的影响。方法：回顾分析60例行鼻腔和副鼻窦高分辨多排螺旋CT检查患者的图像资料。 其中男35例，女25例，平均年龄42岁。所有受试者均采用16排螺旋CT机行高分辨容积扫描，层面从硬腭至额窦上缘，准直0.75~1 mm，横断、冠状和矢状重建，层厚及层距均为1 mm。分别观察和统计鼻中隔和中鼻甲解剖变异的类型和发生率，并评价其与前组鼻副窦引流通道的关系。结果：60例中，共发现鼻中隔变异45例(75%)，其中鼻隔偏曲45例(单向偏曲31例，双向偏曲14例)；犁骨软骨结合部畸形5例(肥大2例，脱位3例)；鼻隔刺16例。中鼻甲变异共43例(71.7%)，其中反曲15例；气化9例；双侧不对称20例(46.5%)。不对称中鼻甲中，增大一侧多见于鼻隔偏移方向的对侧，多数伴有不同程度的钩突移位和筛漏斗或鼻道狭窄。结论：鼻腔和中鼻甲不对称与鼻中隔偏曲关系密切，后者是导致前组鼻副窦引流通道中的关键部位--中鼻道和筛漏斗狭窄的重要原因。
ObjectiveTo explore the value and role of post-processing techniques such as 3D reconstruction in the online education mode in neurosurgery undergraduate clinical probation teaching.MethodsA retrospective analysis method was used to collect 120 clinical 5-year medical students who were trained in neurosurgery at West China Hospital of Sichuan University from January 2019 to May 2020, including 40 students receiving traditional imaging materials offline (control group 1), 40 students being taught on image post-processing technology offline (control group 2), and 40 students being taught on-line image post-processing technology during the novel coronavirus epidemic (observational group). The students’ scores of departmental rotation examination and feedback survey results on teaching satisfaction were collected, and multiple comparison was conducted between the observational group and the two control groups respectively.ResultIn the control group 1, the control group 2, and the observational group, the theoretical test scores were 36.80±3.22, 38.17±2.61, and 38.97±2.79, respectively; the case analysis scores were 37.05±2.01, 38.40±2.62, and 39.25±2.88, respectively; the total scores were 73.85±5.06, 76.57±4.29, and 78.10±4.53, respectively; the scores of interest in teaching were 84.47±3.71, 86.05±2.87, and 86.82±2.60, respectively; the scores of mastery of knowledge were 82.85±4.39, 84.90±2.72, and 85.78±2.36, respectively; and the scores of overall satisfaction with teaching were 84.17±3.45, 85.97±2.64, and 86.37±2.59, respectively. The differences among the three groups were all statistically significant (P<0.05). The observational group differed significantly from the control group 1 in all the above scores (P<0.05), while did not differed from the control group 2 in any of the above scores (P>0.05).ConclusionsIn neurosurgery internship activities, the online application of image post-processing techniques such as 3D reconstruction will help students establish 3D spatial concepts, better understand the brain anatomy, and improve students’ academic performance and acceptance.