What's the difference between CT and X-ray?

1. Escort is not recommended. If accompanied, it is recommended to wear protective clothing. At the same time, patients are also advised to wear protective equipment in non-examination parts, especially in key parts such as gonad and thyroid (gonad has lead triangle, lead apron and thyroid has lead collar), and only head ct can protect most of the body.

2 The image information is different. X-ray is equivalent to looking in a mirror, while CT is a horizontal slice to spell out a three-dimensional image.

There should be no high-density objects in the inspection parts of the two, and there is no need to remove metals from other parts, which is the requirement of NMR.

There is little difference in the process of 3 rays. In addition to normal positioning, chest CT may also need to inhale and exhale according to the doctor's prompt.

The radiation dose of CT is much larger than that of radiography, which is generally about 2 orders of magnitude. Theoretically, the recommended inspection sequence is as follows

Ultrasound/nuclear magnetic resonance, radiography, fluoroscopy, CT. The farther back, the more radiation.

In addition, the CT film shows the reference value, not the actual radiation dose received by the patient. In fact, it is bigger than dozens of MSVs.