This discomfort disappears when the test is completed. You may also feel uncomfortable for a short while if small, enclosed space causes you discomfort. Equipment used I.V. tracer isotope. You or a close relative will be required to sign a consent form after the procedure has been explained to you. You will receive an I.V. tracer isotope 2 or 3 hours before the procedure.
Skin is cleaned with antiseptic.
A radioactive chemical is injected into a vein, usually in the arm. The injection causes only brief discomfort. Follow the technician's instructions regarding positions while you are under the scanner. The scintillating camera or scanner detects rays emitted from the radioactive chemical injected into your body. Rays are converted into images displayed on a video screen for interpretation or photographing for later interpretation.