Also referred to as computerized tomography, the patient is asked to lie on a narrow table within the scanner. Many times a dye must be injected into a vein to create a better contrast of the image being scanned. Dye injections may cause a warm sensation as it travels through the body.
Like the MRI, CT scans offer a very high resolution of the part of the body being scanned. The major drawback is the need for the injected dye, which is iodine based, and which can cause an allergic reaction in some people.