What is the abbreviation of CT?

CT is the abbreviation of Computed Tomography. That is, computer tomography, which uses precisely collimated X-ray beams, gamma rays, ultrasonic waves, etc. Cross-sectional scanning around a certain part of human body with high sensitivity detector has the characteristics of fast scanning time and clear image, and can be used for examination of various diseases; According to the different rays used, it can be divided into X-ray CT(X-CT) and γ-ray CT(γ-CT).

principle

According to the difference of X-ray absorption and transmission of different tissues in the human body, CT uses high-sensitivity instruments to measure the human body, and then inputs the measured data into the electronic computer. After processing the data, the electronic computer can take a cross-sectional or three-dimensional image of the examined part of the human body and find tiny lesions in any part of the body.

The scanning method used in ultra-high speed CT scanning is completely different from the former. The scanning time can be as short as less than 40 ms, and multiple frames of images can be obtained per second. Because the scanning time is very short, film images can be taken and artifacts caused by motion can be avoided. Therefore, it is suitable for cardiovascular angiography and can not be well matched with children and patients with acute trauma.