Ureteral stones can be detected by ultrasound, urography, intravenous urography, retrograde urography and spiral CT. 1. Ultrasound: It is often used as the first choice of imaging test, which can show the hyperechoicity of the stone and its posterior acoustic shadow, and can clarify whether there is hydronephrosis and renal parenchymal atrophy. 2. Urography: Urography can roughly define the location, shape, size and number of stones, and can also initially determine the chemical nature of the stones. 3. Intravenous urography: It can further define the degree of urinary tract obstruction and renal function damage, and can find potential local factors such as ureteral stenosis. 4. Retrograde urography: it can clearly show the location of ureteral stones and the degree of obstruction, but because it is invasive, it is often not used as the initial diagnostic means. 5. Spiral CT: It is suitable for the examination of stones that cannot be clearly identified by other examination methods during the attack of ureteral colic. If ureteral stones are detected, it is necessary to go to the hospital as soon as possible, and the doctor will formulate an individualized diagnosis and treatment plan according to the specific condition, so as to avoid delaying the condition.