Development course of CT scanner

Since the discovery of X-ray, it has been used in medicine to detect human diseases. However, because there is little difference in the absorption of X-rays by some organs in the human body, it is difficult to find the lesions of X-rays in those overlapping tissues. As a result, scientists in the United States and Britain began to look for a new thing to make up for the lack of X-ray examination of human lesions. 1963, American physicist Cormac found that the X-ray transmittance of different tissues in human body is different, and some related calculation formulas were obtained in the study, which laid a theoretical foundation for the later application of CT. 1967, British electronic engineer Huntsfield began to develop a new technology without knowing the research results of Cormac. He first studied pattern recognition, and then made a simple scanning device, and later CT, which can strengthen the X-ray radiation source and be used for experimental scanning measurement of human head. Later, he used this device to measure the whole body and achieved the same effect. 197 1 In September, Huntsfield cooperated with a neuroradiologist, installed the equipment designed and manufactured by him in a hospital outside London, and started the head examination. 10 year10.4, the hospital used it to check the first patient. When the patient is fully awake, the X-ray tube is installed above the patient and rotates around the examination site. At the same time, a counter is installed under the patient, so that the X-ray absorption of various parts of the human body is reflected on the counter, and then the images of various parts of the human body are displayed on the screen after being processed by the electronic computer. The experiment was very successful. 1In April, 972, Huntsfield announced this result for the first time at the annual meeting of radiology in Britain, officially announcing the birth of CT. This news caused a great shock in the scientific and technological circles, and the successful development of CT was hailed as the most important achievement of diagnostic radiology since Roentgen discovered X-rays. Therefore, Huntsfield and Cormac won the 1979 Nobel Prize in Physiology and Medicine. Today, CT has been widely used in medical diagnosis.