computed tomography: meaning, definition, pronunciation and examples

A CT scan uses X-rays to create images, is faster, and is excellent for visualizing bones, blood vessels, and acute bleeding. An MRI uses strong magnetic fields and radio waves, is better for imaging soft tissues like the brain, ligaments, and spinal cord, and involves no ionizing radiation.

Yes, they are the same. 'CAT scan' stands for Computed Axial Tomography, an older term that specifically referred to the axial (horizontal) plane imaging. Modern 'CT' scanners can image in multiple planes, so 'CT scan' is now the more accurate and common term.

The primary risk is exposure to ionizing radiation, which is higher than in a standard X-ray. However, the diagnostic benefit usually outweighs this small risk. Doctors minimize unnecessary exposure, especially in children and pregnant women. Some patients may also have an allergic reaction to the contrast dye sometimes used.

Preparation depends on the type of scan. You may be asked to fast for a few hours, avoid caffeine, or drink a contrast solution. You must remove metal objects. Always inform the staff if you are pregnant, have kidney problems, or have had reactions to contrast dye in the past.

A medical imaging technique that uses computer-processed X-ray measurements from multiple angles to produce cross-sectional (tomographic) images of specific areas of a scanned object, allowing the user to see inside without cutting.

Computed tomography is usually technical/medical in register.

Computed tomography: in British English it is pronounced /kəmˌpjuːtɪd təˈmɒɡrəfi/, and in American English it is pronounced /kəmˌpjuːt̬ɪd təˈmɑːɡrəfi/. Tap the audio buttons above to hear it.