CT scanning in patients with ureter calculus can directly and accurately shows the thickness of renal parenchyama / the volume of kidney hydronephrosis and ureterectasia .

CT平扫可以对肾实质厚度、肾脏的体积大小、肾盂 积水 和 输尿管 扩张有直观和准确地 评价；

There was significant difference between upper and lower ureter in the degree of ureterectasia and hydronephrosis ( also P < 0.01 and P < 0.05 ) .

上、下段 结石 所致的肾 积水、 输尿管 扩张有显著差异，P<0.01和P<0.05。