摘要
目的 :运用多层螺旋CT测量正常成人及原发性鼻泪道阻塞 (PNDO)患者的骨性泪道的长度和最狭窄处直径 ,了解骨性泪道的长度和直径与PNDO的关系。方法 :43例正常成人和 2 1例PNDO患者行多层螺旋CT轴位平扫 ,并用多平面重组 (MPR)技术行矢、冠状位的二维重组 ,并测量骨性泪道的长度和最狭窄处直径 ,采用两两比较t检验判断正常组和PNDO组的测量结果。结果 :正常成人和PNDO患者骨性泪道平均长度分别是 (13 .2 3± 1.5 8)mm和 (13 .70±1.17)mm ,差异具有显著性意义。正常成人和PNDO患者骨性泪道平均最小直径分别是 (4 .11± 0 .5 3 )mm和 (3 .0 6±0 .40 )mm ,差异具有显著性意义。结论 :利用多层螺旋CT薄层重建及三维图像后处理技术可以准确测量骨性泪道的长度及狭窄处的直径 ,表明长和窄的骨性泪道较容易导致PNDO。
Objective:To measure the length of the bony lacrimal duct and the diameter of the narrowest part of the duct in normal adults and in patients with primary nasolacrimal duct obstruction (PNDO) using multi-slice spiral CT (MSCT),to analyse the relationship between the length and width of bony lacrimal duct and PNDO.Methods:Forty-three normal adults and twenty-one patients with PNDO underwent axial plain CT scanning,the sourse images were processed with MPR (multi-plannar reconstruction) technique,and the length of the bony lacrimal duct and the diameter of the narrowest part of the duct were measured.We compared the values of length and width between the two groups with independent-samples T test.Results:The average lengths of bony lacrimal duct in normal adults and patients with PNDO were (13.23±1.58)mm and (13.70±1.17)mm respectively,the difference was statistically significant.The average diameters in normal adults and patients with PNDO were (4.11±0.53)mm and (3.06±0.40)mm respectively,the difference was statistically significant.Conclusion:The length of the ducts and the diameter of the narrowest part of the duct can be accurately measured using MSCT with advanced postprocessing technique.Our primary results have shown that the long and narrow bony lacrimal duct may be the cause of PNDO.
出处
《放射学实践》
2004年第11期809-811,共3页
Radiologic Practice
关键词
泪道
体层摄影术
X线计算机
原发性鼻泪道阻塞
Lacrimal duct
Tomography,X-ray computed
Primary nasolacrimal duct obstruction
