Abstract
The attenuation properties of the various kinds of tissue in the patient’s body with respect to X-ray photons in the energy range of about 10 keV to 150 keV is determined principally by the photoelectric effect and Compton scattering (see Chap. II.2). Therefore, in X-ray imaging, photons emitted from the focal spot of the X-ray tube enter the patient, where they may be absorbed, transmitted without interaction (primary photons) or scattered (secondary photons). The radiation image is formed from the emergent primary photons while impaired by the secondary photons (see Chaps. II.5 and III.2). By the interaction of all these photons with a suitable image receptor, the radiographic image is built up. So the X-ray image consists of a two-dimensional projection of the attenuating properties of the tissues in the three-dimensional volume of the patient’s body along the path of the X-ray photons superimposed by scattered radiation.
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Aichinger, H., Dierker, J., Joite-Barfuß, S., Säbel, M. (2004). Penetration of X-rays. In: Radiation Exposure and Image Quality in X-Ray Diagnostic Radiology. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-662-09654-3_5
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DOI: https://doi.org/10.1007/978-3-662-09654-3_5
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