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X-rays

· Describe the use of X-rays in imaging internal body structures

X-rays belong to the short-wavelength, high frequency end of the electromagnetic
spectrum. They have wavelengths in the range of 10-8m to 10-13m. They are produced when
fast-moving electrons are rapidly decelerated; their kinetic energy is transformed to photons…

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Contrast media are used to distinguish between different soft tissues that absorb X-rays
equally and would otherwise show up the same on an image. They are elements with high
values of the atomic number; they have a high number of electrons in their atoms which
interact with the x-rays resulting…

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Computerised axial tomography consists of an X-ray tube which rotates round a patient
whilst the detectors remain stationary. The CAT scanner is operated when the patient lies in
a vertical ring of X-ray detectors. The x-ray tube rotates around the ring which exposes the
patient to a beam of X-rays…

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