Nuclear medicine uses small amounts of radio-pharmaceutical which is injected and then used to image an organ system or specific part of the body. Imaging is performed with a special camera known as a gamma camera. After the injection imaging is sometimes performed immediately. Other studies require delayed imaging after a few hours or even overnight. You will be instructed regarding the specifics of when the imaging is performed. Depending on your exam, you may require some preparation. You may have already received prep instructions (prep sheet or by text message). Should you have any questions, you may consult a Central Booking agent at (780) 669-2222, or toll free at (1-866) 771-9446.