电子束CT腮腺造影并三维重建在腮腺肿块诊断中的应用

目的：探索电子束ＣＴ腮腺造影泛影葡胺的最佳浓度，电子束ＣＴ平扫、腮腺造影ＣＴ和三维ＣＴ在腮腺肿块诊断中的应用价值。材料和方法：对１６例腮腺肿块分别进行电子束ＣＴ平扫，４５％、６０％和７６％三种不同浓度泛影葡胺腮腺造影ＣＴ扫描，腮腺造影图像应用四种方法进行三维重建，显示结果进行统计学分析和与手术病理对照分析。结果：腮腺造影ＣＴ泛影葡胺浓度以６０％最佳，腮腺造影ＣＴ较电子束ＣＴ平扫对腮腺肿块的显示更为准确。三维ＣＴ对腮腺肿块和其与面神经的关系显示得更为直观，容积显示法可同时显示腮腺肿块和腮腺内导管的改变，较表面显示法更有价值。结论：电子束ＣＴ腮腺造影并三维重建是诊断腮腺肿块非常有价值的检查手段。

Electric Beam CT Sialography and Three-dimensionalReconstruction in Diagnosis of Parotid Masses

urpose:To explore the best concentration of meglumine diatrizoate (MD) for electric beam CT (EBCT) sialography, and to evaluate the diagnostic potential of plain EBCT,EBCT sialography and three-dimensional rendering in patients with parotid masses.Materials and Methods:In 16 patients with parotid masses,plain EBCT,EBCT sialography with 45%,60% and 76% MD and three-dimensional rendering were done. Four methods were used in the three-dimensional reconstruction.The datas were managed by using statistics,and the results were compared with the pathologic findings.Results:The best concentration of MD in EBCT sialography was 60%.EBCT sialogaphy was more precise than plain EBCT in the diagnosis of parotid masses.Three-dimensional rendering was more was in effective showing the parotid masses and their relations to the face nerve than the other two metheds.Volume rendering methed was better in showing the change of the parotid ducts and the masses than surface rendering methed.Conclusion:EBCT sialography with three-dimensional rendering is a very useful methed in the diagnosis of parotid masses.