在静脉尿路造影中,因输尿管严重梗阻致肾重度积水,肾脏及输尿管显影时间延迟,常规摄影难以显示梗阻近段输尿管及梗阻端形态,而不得不进行逆行插管造影或MR水成像(MRU)检查。作者采用在常规造影完成后让患者下床适当活动,延迟3～6h摄片,达到了显示扩张输尿管及梗阻端形态的目的, In intravenous urography, due to severe ureteral obstruction caused by severe hydronephrosis, renal and ureter development time delay, conventional photography is difficult to show proximal obstruction ureter and obstruction morphology, and had to retrograde intubation or MR water imaging ( MRU) check. The authors used to allow patients to get out of bed after the completion of conventional radiography appropriate activities, delayed 3 ~ 6h radiography to achieve the purpose of displaying the expansion of ureter and obstruction morphology,