The c-arm refers to the basic principles of ordinary x-ray on top. Combined with the development of modern medical technology, produced a semi-circular x-ray head illumination equipment. One end releases the ray casting instrument, and the other end is the instrument that collects the light-sensitive.
Because the shape of the English letter c, so called c-arm. c-arm is basically divided into mobile small machine, and fixed non-mobile large c-arm. The large non-mobile type is suitable for outpatient examination of common patients.