Renal Scans are performed for a number of reasons mostly to assess blood flow
to the kidneys and kidney function. Hypertension is a common indication for this
study. This test is a simple, non-invasive way to evaluate how well your kidneys
function. There are no dietary restrictions either before or after the
examination. It is extremely important that you are well hydrated 30 minutes
prior to your study. We will require you to drink 2 - 3 cups of water unless
your primary physician has advised you to restrict your fluid intake. The test
requires an injection in an arm vein. This injection consists of a very small
amount of the radioactive element called technetium. The radioactivity
associated with the renal scan is negligible, and there are no ill effects from
There is no preparation for this test.
- The technologists will instruct you to drink 2 - 3
cups of water.
- You will be requested to empty your bladder.
- The technologist will position you (on your back) on
a scanning table.
- Receive an injection into an arm vein.
- Lie quietly for 30 minutes while your kidneys are
- You will be instructed to empty your bladder again.
- You will be positioned standing or sitting for a
image with the bladder empty, about 2 minutes.
- Review by nuclear medicine physician takes about 10 -
- Additional images may be requested at the discretion of the reviewing