Final answer:
Computed tomography (CT) is a noninvasive medical imaging technique that uses X-rays and computers to obtain detailed cross-sectional images of the body. It can be performed with or without IV contrast to enhance visibility. A CT scan provides precise information about structures in the body, allowing physicians to measure the size of masses and detect abnormalities.
Step-by-step explanation:
Computed tomography (CT) is a medical imaging technique that uses a computer-enhanced cross-sectional X-ray image to obtain detailed information about structures in the body. It is a noninvasive procedure where the patient lies on a motorized platform while a computerized axial tomography (CAT) scanner rotates 360 degrees around the patient, taking X-ray images. These images are then combined into a two-dimensional view or "slice" of the scanned area. A CT scan can be performed with or without IV contrast, which refers to the use of a contrast agent to enhance the visibility of certain structures or abnormalities.