Electronic computer X-ray tomography scanner referred to as X-CT or CT), is the use of x-rays on the human body after tomography, from the detector received analog signals and then into digital signals, by the electronic computer calculates the attenuation coefficient of each pixel, and then rebuild the image, and can show the tomographic structure of the various parts of the human body device. It displays the nuances of human body tissues clearly in the form of tomographic images. It completely solves the problem of internal overlapping display, and can express the absorption coefficients of various tissues of the human body to x-rays in fairly accurate figures, thus enabling correct diagnosis of lesions in soft tissues. The range is -1000 to 10,000, with air at -1000, water at 0, and bone at 10,000.