How are kidney stones diagnosed?

A CT scan of the kidneys and ureters (CT KUB) is the best test to detect stones.
The scan will provide information on the number of stones, their size and location
Stones may also be detected on an ultrasound of the kidneys or a plain Xray, however these are less sensitive than a CT and can easily miss stones.
In addition to X-rays, a urine test will be required to rule out a urinary tract infection, as well as baseline blood tests including kidney function tests