Why can't there be metal objects on the body when doing CT examination in the hospital?

Why can't there be metal objects on the body when doing CT examination in the hospital?

If you can extract metal before ct and try to extract it, such as jewelry worn outside, you should consult a doctor when doing CT examination. Medical photographers use special image processing software to process cultural relics to minimize the interference to cultural relics. Because in computerized tomography, objects including clothes and jewelry should not be scanned, including metal jewelry, metal jewelry on clothes, mobile phones, keys, coins and so on.

When scanning metal objects, they may produce false images that affect the image quality, thus creating unnecessary illusions. However, metal objects that are not covered by scanning will not affect the image quality. For example, when doing abdominal ct examination, necklaces and earrings have no effect on the examination results. The buttons on the metal belt and the metal buttons on the clothes should be removed. Therefore, before starting the inspection, be sure to know which parts need to be inspected, and take out metal objects in advance, especially the metal parts in underwear.

They should also have the confidence to do so. There are metals in the body, and beam solidification will occur during tomography, so metal artifacts will be formed during tomography. During CT examination, doctors usually advise patients to take out metal objects from the body to avoid metal artifacts. However, if the metal is in the wild, tomography is generally not recommended. Because of the poor interpretation ability of CT images, there is no good beam hardening correction method at present, and many of them only stay in the laboratory stage.

Computed tomography can cause metal arteries and affect the image quality, thus showing the radial arteries around metal objects. Generally speaking, it is enough to avoid scanning metal objects in the position. Does not affect the computer check. Therefore, metal objects can be input unless they are in the scanning position. Don't check in the hospital, try not to bring valuables, metal objects and decorations, so as not to cause unnecessary trouble.