The barium appears white on the scan as it travels through the digestive system. Sometimes, a contrast dye is used because it can help show certain structures more clearly.įor instance, if a 3-D image of the abdomen is required, the patient may have to drink a barium meal. This data is transmitted to a computer, which builds up a 3-D cross-sectional picture of the part of the body and displays it on the screen. The CT scanner’s X-ray detector can see hundreds of different levels of density. The CT scan produces a more detailed final picture than an X-ray image. This is different from an X-ray machine, which sends just one radiation beam. Share on Pinterest A CT scan can help diagnose many types of cancer.Ī CT scanner emits a series of narrow beams through the human body as it moves through an arc.
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