If I already know I have a kidney stone is it necessary to have a CT scan?

Possibly. If you know you have a kidney stone, a ct scan is not necessary unless symptoms develop. If the person remians asymptomatic, periodic imaging with ultrasound or other x-rays are adequate. However, small stones may be missed on these studies and a ct scan may be required to locate the stone.
Talk to a doctor. Talk to your doctor or a urologist. Depending on your symptoms and location of the stones, you may or may not need surveillance of the stone. Some stones are seen well on xray but others may need ct.

Related Questions

I have a CT scan with a 3mm kidney stone, unobstructive causing considerable pain for over 3 weeks and have not seen a urologist. What should I do?

See below. See an urologist immediately that stone can cause an infection in the kidney and could with time destroy the kidney. Read more...
Stones. A few pertinent facts about kidney stones: 1. Stones 5mm or less have a 66 to 85% chance of spontaneous passage. 2. Non-obstructing calculi do not cause pain. 3. Stones can move in and out of obstructing positions. 4. A urologist can be helpful even if the stone is likely to pass spontaneously, by appropriately medicating pain and prescribing a medication that may help some stones to pass. Read more...

How do I know if I've passed a kidney stone without another CT scan?

Capture it. Hopefully, you were screening your urine and caught the stone. If the scan showed a 3 mm stone and you captured a 3mm stone, that is good enough. You should be pain free and a check of your urine from your doctor should show that the blood has cleared. Read more...
Strain urine. Urinate through a strainer to catch the kidney stone when it passes from your bladder and through your urethra. Read more...

Could a gall stone be mistaken for a kidney stone on a CT scan.?

Gallstones. No. These organs are in two separate locations. A ct scan is very precise at determining the location of a stone. Read more...
No. Ct scans precisely define the anatomy of different organs in the abdominal cavity. I can safely state that it would be impossible to confuse a gallstone from a kidney stone on a ct scan. Read more...
No. The radiologist knows what the gallbladder and the kidneys look like on a ct scan and that confusion should not be made. Read more...

I had a CT scan done for a kidney stone. It says there appears to be interval thinning of left cortex at the poles. What does that mean?

Renal scarring. The upper and lower poles of the kidney or more vulnerable to scarring secondary to reflux. This may have occurred earlier in life secondary to a febrile urinary track infection characteristic for pyelonephritis which during the healing process can lead to scarring. You cannot eliminate scarring once present but you can help to prevent further urinary tract infections specifically with fever. Read more...

After 2 wks, docs say kidney stone passed since ct scan showed up clear. 3 days later still having pain (not as excruciating but constant). Is normal?

See rmark. If the CT showed NO STONE the discomfort/pain may be resultant of stone passing,as it "scratches the lining of the ureter.Drink enough fluids.I advise you drink a glass of lemonade in AM and one glass in PM. I don't know the nature of your stone,but lemonade which contains CITRIC ACID does help prevent future ones.......Best of luck young lady ..JBR. Read more...