CT images can also be used to measure bone mineral density for the detection of osteoporosis . In cases of trauma, CT can quickly identify injuries to the liver, spleen , kidneys , or other internal organs. Many dedicated shock-trauma centers have a CT scanner in the trauma department. CT can also play a significant role in the detection, diagnosis, and treatment of vascular diseases that can lead to stroke , gangrene or kidney failure. You should wear comfortable, loose-fitting clothing for your CT exam.
Metal objects can affect the image, so avoid clothing with zippers and snaps.
You may will also be asked to remove hairpins, jewelry, eyeglasses, hearing aids, and any removable dental work, depending on the part of the body that is being scanned. You may be asked not to eat or drink anything for one or more hours before the exam. Women should always inform their doctor or x-ray technologist if there is any possibility that they are pregnant. The CT scanner is a large, square machine with a hole in the center, something like a doughnut. The patient lies still on a table that can move up or down, and slide into and out from the center of the hole.