低剂量MSCT扫描在IVP输尿管显影不良中的临床应用

摘要

目的：探讨IVP输尿管显影不良后进行低剂量MSCT扫描的应用价值。方法：IVP输尿管显影不良后，立即或择期进行低剂量MSCT扫描。根据患者的体质情况（如腰围、体重），制定了三组低剂量MSCT扫描参数，不同体质的患者用相应不同扫描参数进行低剂量MSCT扫描，体质瘦小者用低KV、低MA进行低剂量MSCT扫描。统计42例用低剂量MSCT扫描的患者资料，总结其低剂量扫描后减少X线辐射剂量；又统计低剂量MSCT扫描后对输尿管、肾脏疾病的诊断价值。结果：综合分析IVP与低剂量扫描MSCT图像，结果显示为结石是输尿管和/或肾脏结石的首发原因，占64.3%。CT可以发现IVP不能显示的小结石。输尿管显影不良的原因中，输尿管、肾脏先天性疾病所占比率为29.4%。低剂量MSCT扫描可以解决IVP输尿管显影不良的原因。另外低剂量MSCT扫描时，MAS总量一般在1200~3000 MAS，平均减少2100 MAS；CTDI值平均减少59.7%，相当于患者减少210次胸部DR片检查的辐射剂量。结论：IVP输尿管显影不良时，通过低剂量MSCT扫描，减少患者X线辐射剂量，解决了IVP输尿管显影不良的原因，为临床提供正确诊断。%To investigate the application value of low dose MSCT scanning after IVP ureteral adverse development.Method:After IVP ureteral adverse development,low dose MSCT scanning was performed immediately or elective.According to the physical condition of patients(such as waist circumference,body weight),the low dose MSCT scanning parameters of the three groups were formulated,different physical patients were carried out low dose MSCT scanning using different scan parameters,physique thin person were carried out low dose MSCT scanning using low KV, low MA.The data of 42 patients with low dose MSCT scanning were statistical analyzed,the X-ray radiation dose reduction after low dose MSCT scanning was summarized,the value in diagnosis of ureter,renal disease of low dose MSCT scanning were statistical analyzed.Result:The comprehensive analysis of IVP and low dose MSCT scan image,results showed that stone was the first reason for calculus of ureter and/or kidney stones,accounted for 64.3%.CT could be found that IVP couldn’t display calculi.The reason of ureteral adverse development of kidney,ureter,congenital diseases, accounting for 29.4%.Low dose MSCT scanning could solve the causes of adverse development of IVP ureter.In addition to low dose MSCT scanning,the total MAS in general 1200-3000 MAS,an average reduction was 2100 MAS.CTDI value reduced by 59.7%on average,equivalent to reduce 210 times in patients with chest DR ray examination of radiation dose. Conclusion:IVP ureteral development is poor,through low dose MSCT scanning,reduce patient X-ray dose,solve the reason of IVP ureteral adverse development,provide correct diagnosis for clinical.