The Medical x-ray system machine Imaging Systems come in many different shapes and sizes. The Medical x-ray Machine systems are usually operated at voltages of 25 to 150 kVp and has a tube currents of 100 to 1200 mA. The x-ray tube is a component of the x-ray imaging systems rarely seen by the radiologic technologist. How X-rays Work. X-ray technology lets doctors see straight through human tissue to examine broken bones, cavities and swallowed objects with extraordinary ease. Modified X-ray procedures can be used to examine softer tissue, such as the lungs, blood vessels or the intestines.