Which is more accurate, kidney stones color Doppler ultrasound and CT

In general, CT is more accurate than color Doppler ultrasound for kidney stones.

CT can scan the kidney, ureter, bladder and other parts, and can accurately detect the size and location of stones, and CT can detect stones of 2mm or even 1 mm. Kidney stone color Doppler ultrasound is a kind of ultrasonic examination, easy to be affected by air, if the kidney stone volume is relatively small, and falls into the ureter, affected by intestinal gas, may not be able to find kidney stones, and kidney stone color Doppler ultrasound can only detect stones above 0.3cm, too small stones can be found by CT examination, but can not be found by color Doppler ultrasound.