Since the discovery of X-rays, the medical field has used it to check for diseases in the human body. However, because some organs in the human body absorb X-rays to different extents, X-rays are difficult to find for those that are stacked and disordered. In response to this situation, scientists in the United States and the United Kingdom began to look for a new thing to make up for the lack of X-ray technology to view human lesions. So we have our common CT scanner.
The development of CT scanners has also gone through a long period of time, and it has been continuously upgraded and upgraded during this time. The 1st and 2nd generation CT scanners are slow to scan, so they are only used for viewing neurological conditions, and the 2nd generation CT scanners can be used for systemic conditional viewing.
The 3rd generation CT scanner changed the distance between the X-ray source and the rotating shaft to a certain extent, while the X-ray source and the surveyor remained relatively fixed, which means that the scan can be smaller or larger depending on the application requirements. Area and can get a higher spatial resolution. The 3rd generation CT scanner is one of the most widely used machines today.
The 4th generation CT scanner was developed on the basis of the 3rd generation. When the scanning is performed, the explorer is stationary, and the X-ray tube is rotated and scanned in the circle of the explorer array. This configuration eliminates the explorer. The problem caused ring artifacts.
The clinical application of CT scanners is increasingly widespread and perfect, and the types of CT scanners are increasing, their structures are different, and their functions are not the same. They complement each other in clinical applications. Today, CT scanners are not only used for clinical diagnosis, but also for radiation therapy, cardiac dynamic scanning, dose regulation, fine living specimen sampling, and cancerous identification.
CT combined with X-ray fluoroscopy, isotope, ultrasound and other methods of impression display, established an impression diagnosis. Today, CT scanning is one of the three major imaging technologies in modern medicine. CT scanners have become one of the symbols of modern hospitals. The use of CT scanners to avoid unnecessary surgery and invasive examinations has greatly improved the patient's quality of life.
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