Looking within: Part 3. More ... photons, protons, and all that....
To summarize: Most radiographic and all fluoroscopic and CT studies make use of bremsstrahlung X-ray photons, with beam energies typically between 60 and 120 kVp. Breast imaging uses the nearly monochromatic (of only one wavelength and energy) characteristic X-rays of molybdenum, with energies just under 20 keV.
Wolbarst
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Georgetown University School of Medicine, Department of Radiation Medicine, Washington, D.C., USA.
D006801:Humans; D017785:Photons; D011522:Protons; D011839:Radiation, Ionizing; D011859:Radiography; D014057:Tomography, X-Ray Computed
D011522:Protons