The time varies because the rate at which the kidneys function will differ for each individual.There are no known associated risks involved in the DTPA scan itself.
This can be detected by the gamma camera and will provide clear images of the kidneys.
After about 15 minutes of scanning, you may be given a second injection through the same cannula of a diuretic called frusemide (Lasix).
The test can find out what percentage each kidney contributes to the total kidney function.
A DTPA Scan may also be undertaken to evaluate: It is important, prior to having the scan, that you have plenty of fluid to drink and are well hydrated.
The frusemide will help your kidneys to work harder, so your bladder will fill faster.