分离团注技术在CTU检查中的优势

Advantage of separate bolus injection technique in CT urography

目的探讨在CTU检查中利用分离团注技术提高全尿路的显示情况,即同时显示双侧肾盂肾盏,双侧输尿管及膀胱。方法泌尿系统螺旋CT扫描的病例60例,30例行分离团注技术,30例单次团注技术,扫描包括常规平扫、皮质期、髓质期、延迟期,延迟期进行三维重建显示全尿路,分析比较两组成像质量。结果①单次团注组肾盂输尿管全段及膀胱显示优19例,显示良好10例,显示一般1例。分离团注组肾盂输尿管全段及膀胱显示优良22例,显示良好8例;②单次团注输尿管扩张:左侧起始段46.1,中下段45.3,右侧起始段55.1,中下段37.4。右侧起始段55.1,中下段37.4。分离团注输尿管扩张:左侧起始段55.3,中下段59.4。右侧起始段63,中下段46.7;③输尿管内中心密度:单次团注P:0.8072,分离团注P:0.8854。结论应用分离团注技术进行CTU扫描,使第一次对比剂注射剂量相对减少,在降低患者对比剂反应的同时,又可获得优质的可用于诊断的清晰尿路全程影像。

Objective To investigate the use of separate bolus injection technology in CTU improving the display of the whole urinary tract. Methods 60 cases of urinary system spiral CT scan included 30 cases of separate bolus injection and 80 cases of single bolus injection consisted of unenhanced scanning, cortical phase, medullary phase and lag phase. Recon- struction of lag phase displayed the entire urinary tract. Then the image quality between two groups were compared. Re- sults At single bolus injection group, the whole urinary tract showed excellent in 19 cases, good in 10 cases, normal in 1 case, which showed excellent in 22 cases, good in 8 cases at separate bolus injection group. Conclusion The application of separate bolus injection technique in CTU scan can receive high-quality image of entire urinary tract.