How accurate are xrays in finding kidney stones?

Not very accurate. Abdominal xray are usually not very accurate as the first study for kidney stones. Some stones are not opaque enough to be seen on an xray alone. The kidneys are frequently obscured by bowel gas & stools on the xray and can't be visuallized well, particularly if the stones are small. Ct (better) or ultrasound are better. Xray can be then used for follow up once the stones have been located.
Very good. Imaging studies nowadays are very good and accurate at detecting kidney stones. They can tell us the size and location of most stones. The vast majority can easily be diagnosed with current imaging studies. There is a small chance that a very small stone (less than 2 or 3 mm) may be missed but overall the detection rate for most stones is very high.

Related Questions

How accurate is a xray for detecting kidney stones because its been a month since I was diagnosed and still no stone can it be something else in there?

Kidney stones. For a very large kidney stone we may use an xray to trac it, however the small stone requires a ct to see them. Ct's give alot of raditation and nust be used with discretion, for your own health. Nothing is perfect, but searching for a small stone, and other ureteral or renal problems a ct may give you the best diagnostic options. Read more...
Not very. There is little role for an abdominal xray when helical ct is available. An x-ray will identify sufficiently large radiopaque stones such as calcium, struvite, and cystine stones, but will miss uric acid stones. It may miss small stones or ones overlying bony structures. It is not the imaging method of choice for initial diagnosis. Read more...

Is it possible for a kidney stone to be stuck in the lower portion of the ureter without inflicting any pain? Mine appears stuck (xray), w/ no symptoms?

Yes. Eagle it is possible if the stone is not obstructing the flow of the urine. Some stones do not obstruct and therefore do not cause symptoms, but they can eventually become obstructive or partially obstructive so they are often treated if they do not pass on their own. Read more...