|
|
|
|
|
|
|
CT Scan |
|
A "CT" or "CAT" scan is the term used to describe a radiologic test known as "Computerized Tomography" or "Computerized Axial Tomography." The CT scanner is a doughnut-shaped machine that takes pictures of cross-sections of your body, called "slices." CT scans can see inside the brain and other parts of the body, into areas that cannot be seen on regular x-ray examinations. CT makes it possible to diagnose certain diseases earlier and more accurately than with other imaging tools. Because most diseases are better treated when found early, CT scans can help save lives. The CT scan test itself is completely painless. You will be asked to lie quietly on the CT scanner's "patient couch" during the study. Depending on the type of study being done, you may be injected with, or be asked to drink, contrast material. This part of the procedure may be uncomfortable. The contrast agent allows the radiologist to obtain clearer images of your organs. Because contrast agents contain iodine, which causes allergic reactions in some individuals, be sure to tell the technologist, nurse or radiologist if you have had an allergic reaction to these agents before, or if you have any other allergies. You may have been given contrast material earlier as part of a CT scan, a kidney x-ray (also called an IVP), or a heart or blood vessel catheterization (also called an angiogram). CT scanners use x-rays. For your safety, the amount of radiation is kept to an absolute minimum and our equipment is kept in top shape. Because x-rays can harm a developing fetus, however, be sure to tell your doctor if you are, or think you may be, pregnant before preparing for the CT scan exam. Even if you haven't told your doctor, be certain to tell the CT scan technologist who prepares you for the study. When it is time for your CT scan, the technologist will bring you into the CT scan room where you will lie down on the patient couch (usually on your back). You should get comfortable, because it is very important that you not move during the test. CT examinations differ depending on your medical problem and the part of your body being studied. The radiologist will plan an examination that is best suited for you. For example, if your abdomen is being studied, a series of pictures will be taken from your lower chest down to the upper pelvis. During such a study, you will be asked to hold your breath so that the pictures will not be blurred. The machine will make some noise, and the couch may move slightly after each picture. Also, you may receive signals from the technologist (or from the machine) about your breathing. Should you have any discomfort during the test, tell the technologist. All the CT personnel are trained and certified and know how to help you. Finally, you should
know that each examination is tailored to your individual
requirements, so don't be alarmed if your exam is different from one
you've had before, or if some additional pictures are taken after
the first series is completed. From start to finish, the
picture-taking part of the test usually lasts only 10 to 15 minutes. |
