Is x-ray just CT?

No, it's two inspection methods. Everything said on the second floor is wrong.

CT machine is a computerized X-ray tomography camera, which scans a certain thickness of selected parts of human body with X-rays. The detector receives the attenuation value of this layer of X-rays and converts it into current, which is then converted into the required number by an analog converter, and then processed by an electronic computer and arranged into a digital matrix. Then, after digital-to-analog conversion, the digital matrix is converted into pixel matrices with different gray levels, which are displayed on the TV screen and photographed by the camera, which is the conventional CT plain scan. Black areas in the film represent low absorption areas, that is, low density areas, and white areas represent high absorption areas, that is, high density areas. Different CT values are determined by different density values.

It is developed from the X-ray machine. Its resolution and qualitative diagnosis accuracy are much higher than those of ordinary X-ray machines.

Generally speaking, all organic diseases can be examined by CT, especially organic space-occupying lesions with great density difference, which can be detected and qualitatively diagnosed. But the most suitable diseases for CT examination are brain diseases, among which tumors, hemorrhage and infarction are the best, followed by space-occupying lesions of abdominal parenchymal organs, such as tumors of liver, spleen, pancreas, kidney and prostate, and lumps of breast and thyroid can also be displayed and diagnosed. Secondly, check the masses in chest cavity, lung and heart cavity, and the masses in spine, spinal cord, pelvic cavity, gallbladder and uterus. CT is not effective in detecting some diffuse inflammation and degenerative diseases (such as hepatitis). CT is of little value, and it is not as good as endoscope in detecting gastrointestinal diseases.

CT can easily find tumors, lumps and bleeding. But the focus is too small, especially less than 6 mm, and CT is difficult to find.