螺旋CT多平面重组在副鼻窦检查中的应用

目的 :利用螺旋CT多平面重组技术探讨副鼻窦轴位扫描能否代替直接冠状位扫描。方法 :对 15例能合作的患者 ,均行副鼻窦轴位及冠状位扫描。使用美国GEProspeedFII双排螺旋CT机 ,层厚 5mm ,螺距 0 .75 ,连续横轴位扫描 ,利用多平面重组 (MPR)技术得到冠状位、矢状位重组图像 ;直接冠状位扫描获取冠状位图像 ;将同一患者的两组不同冠状位图像比较 ,主要观察各鼻窦窦壁及窦口。结果 :轴位扫描后重组所获图像亦能从多方位多角度观察 ,清楚显示各鼻窦及窦口。结论 :重组冠状位图像与直接冠状位扫描图像效果相同 ,可以取代直接冠状位扫描。避免后者检查时头部后仰造成的不适 ,患者容易接受 ,值得推广。

The application of spiral CT MPR in diagnosis of diseases of paranasal sinuses

Objective:To study the usefulness of CT MPR in diagnosis of paranasal sinuses diseases,and to discuss whether the CT MPR can replace the direct coronal scanning.Methods:Conventional axial scanning and direct coronal scanning of the paranasal sinuses were performed in 15 cooperative patients using a GE prospeed F II dual slice helical CT scanner. The slice thickness was 5 mm,pitch was 0.75. After axial scanning,the images were reconstructed into coronal and sagittal images with software of MPV. The coronal images of both methods from the same patient were compared. The sinuses wall and entrance were mainly observed.Results:On the CT MPR images, the wall and entrance of the paranasal sinuses could clearly demonstrated. Conclusion:The image quality of the reformatted coronal images is the same as that of the direrct coronal images.In addition,this technique can avoid the discomfort of the patient during the coronal scanning and can replace the direct coronal scanning.