Although the amount of radiation from one test is usually less than the amount of radiation you are naturally exposed to over 3 years, patients should not receive more CT scans than what is recommended by clinical guidelines.Ī chest magnetic resonance imaging (MRI) scan uses radio waves, magnets, and a computer to create pictures of the structures in your chest. There is also a slight risk of cancer, particularly in growing children, because the test uses radiation. In rare instances, some people have an allergic reaction to contrast dye. For some diagnoses, a contrast dye, often iodine-based, may be injected into a vein in your arm before the imaging test. You will be able to hear and talk to the technician performing the test while you are inside the scanner. You will hear soft buzzing or clicking sounds when you are inside the scanner and the scanner is taking pictures. You will lie still on a table and the table will slide into the scanner. Your chest CT scan may be done in a medical imaging facility or hospital. It can also tell your healthcare provider if you have certain lung problems, such as a tumor, excess fluid around the lungs that is known as pleural effusion, or pneumonia. Computers can combine these pictures to create three-dimensional (3D) models that show the size, shape, and position of your lungs and the structures in your chest.Ī chest CT scan can help figure out the cause of lung symptoms such as shortness of breath or chest pain. A chest computed tomography (CT) scan is a painless imaging test that takes many detailed pictures, called slices, of your lungs and the inside of your chest.
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