ionizing radiation - high-energy radiation capable of producing ionization in substances through which it passes

electromagnetic radiation, electromagnetic wave, nonparticulate radiation - radiation consisting of waves of energy associated with electric and magnetic fields resulting from the acceleration of an electric charge

tomography, imaging - (medicine) obtaining pictures of the interior of the body

computed axial tomography, computed tomography, computerized axial tomography, computerized tomography, CT, CAT - a method of examining body organs by scanning them with X rays and using a computer to construct a series of cross-sectional scans along a single axis