High-resolution CT is a kind of computed tomography scanning technology with a scanning layer thickness of 1.0~1.5mm, which shows lesions more clearly compared with ordinary CT. High-resolution CT is a computed tomography scanning technology with thinner scanning layer thickness, which utilizes X-rays to scan the human body in layers, and then through computer algorithms for imaging, so as to achieve the purpose of displaying the organism and lesions. Compared with ordinary CT, high-resolution CT is more detailed and clearer, and shows lesions more accurately, and is often used to check whether some microstructures are abnormal. The significance of high-resolution CT in detecting abnormalities in the central system (such as the base of the skull, cochlea, etc.), small nodules in the lungs, etc. is particularly obvious.