Across
- 2. Any device that captures a radiographic image.
- 5. Undesirable additional signal intensity on a completed radiographic image caused by scattered radiation reaching the image receptor.
- 6. Fluorescents that shows number of x-rays emitted per inner-shell vacancy.
- 9. Process whereby the energy of the incident photon is completely absorbed as it interacts with an atom and ejects an inner-shell electron from its orbit about the nucleus.
- 10. Density quantity of matter per unit volume
- 11. An electron emitted from an atom by interaction with a photon, especially an electron emitted from a solid surface by the action of light
- 13. A scattering process wherein less than 10keV interacts with an atom of human tissue and does not lose its energy. No ionization of the biologic atom occurs. Also known as classical scattering, elastic scattering, unmodified scattering, and Rayleigh scattering, and Thompson scattering.
- 14. Photons that reach their destination (image receptor) after passing the patient being radiographed; previously known as remnant radiation.
- 16. An x-ray also known as characteristic photon
- 17. Production. A process, the energy of the incoming photon is transformed into two new particles – a negatron and a positron – after which these particles exit from the atom and carry away some of the momentum of the absorbed photon when the photon's energy is greater than 1.022 MeV.
- 19. Scattering responsible for most scattered radiation produced during radiologic procedures and may be directed as a small-angle scatter, backscatter, or side scatter. Also known as secondary, recoil, or electron scattering.
Down
- 1. An interaction that occurs >10 MeV in high-energy radiation therapy treatment machines.
- 3. Type of contrast that combines Image receptor contrast and subject contrast combine to produce this type of contrast.
- 4. Radiation, also known as characteristic photon.
- 7. Radiation that is a filtered x-ray photon beam from the anode
- 8. The product of electron tube current (mA) and the amount of time in seconds that the x-ray tube is activated.
- 12. Photons that pass through the patient being radiographed, interact with the atoms of the body, are deflected at such a small angle that they can reach the image receptor, called small-angle ____.
- 13. Media either Negative or positive to enhance visualization of body structures.
- 15. A composite Z value for when multiple chemical elements comprise a material.
- 18. Highest energy level of photons in the x-ray beam and the maximum voltage directed across an x-ray tube.