Tell your doctor if you:
Talk to your doctor about any concerns you have regarding the need for the test, its risks, how it will be done, or what the results will mean.
Arrange for someone to take you home after the test. You may not have to stay in the hospital overnight.
Eat a light breakfast the morning of the procedure.
Take your medicines as directed by your doctor. You might stop taking certain medicines before your test and start taking them again after your test.
Before the test, remove any necklaces, bracelets, rings, or other jewelry. You should also remove nail polish from your fingernails and toenails.
Be sure to empty your bladder completely just before the test.