Some degree of apprehension or fear is normal and should be expected. 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. injection of thallium. Description of test You or a close relative will be required to sign a consent form after the procedure has been explained to you.
Skin is cleaned with antiseptic.
A radioactive chemical is injected into a vein, usually in the arm. Multiple images of your heart are made. Follow technician's instructions regarding positions. The scintillation 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.