X-rays 4.0 / 5 based on 1 rating ? PhysicsMedical physicsA2/A-levelOCR Created by: tazorCreated on: 11-04-16 20:35 Who discovered X-rays Wilhelm Röntgen 1 of 16 What is the simple equation for intensity I=P/A 2 of 16 What is the unit of intensity Wm^-2 3 of 16 What is the wavelength of x-rays 0.01 - 10 nanometers 4 of 16 What is the frequency of x-rays 3x10^16 - 3x10^19 Hz 5 of 16 What is the voltage going through an x-ray tube 100-500 kV 6 of 16 Define photoelectric effect An interaction between an X-ray photon and an electron in which the electron is removed from the atom 7 of 16 Define compton scattering An interaction between an x-ray photon and an electron in which the photon is scattered with a longer wavelength 8 of 16 Define pair production A procces where an X-ray photon produces a an electron-positron pair 9 of 16 What is attenuation measured in m^-1 10 of 16 What is most commonly used as a contrast medium Barium 11 of 16 Define a CAT scan A technique where x-rays are used to image slices of the body in order to produce a computerised 3D image 12 of 16 What is contrast media Materials such as Barium that easily absorb X-Rays. It's used to reveal the outlines or edges of soft tissues in an X-ray image 13 of 16 What is an image intensifier A device used to change a low intensity X-ray image into a bright visual image 14 of 16 What does CAT stand for? Computerised Axial Tomography 15 of 16 How can X-ray images be improved Image intensifiers and contrast media 16 of 16
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