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.