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RAD201
| Question | Answer |
|---|---|
| What organization was founded in 2007 that continues their pursuit to raise awareness of the need for dose reduction protocols by promoting pediatric-specified scan protocols to be used for both radiology and non-radiology users of CT? | Alliance for Radiation Safety in Pediatric Imaging |
| The ALARA principle provides a method for comparing the amount of radiation used in various health care facilities in a particular area for specific imaging procedures. This information may be helpful to many | regulatory agencies. |
| Which of the following is not a type of interaction between x-radiation and biologic matter? | Bremsstrahlung |
| Which of the following are by-products of photoelectric absorption? | Photoelectron and characteristic photon |
| Particles associated with electromagnetic radiation that have neither mass nor electric charge and travel at the speed of light are | x-ray photons. |
| When an inner electron is removed from an atom in a photoelectric interaction, thereby ejecting that electron, instead of emerging from the atom as characteristic radiation. What is this electron called? | Auger electron |
| The symbol Z indicates | atomic number of an atom |
| During the process of coherent scattering, an incident low-energy x-ray photon interacts with | an atom and may transfer its energy by causing some or all of the electrons of the atom to momentarily vibrate and radiate energy in the form of electromagnetic waves. |
| Which of the following results in all-directional scatter? | Compton interaction |
| Compton scattering is synonymous with | incoherent scattering. |
| If two anatomic structures have the same density and atomic number but one is twice as thick as the other, the thicker structure will absorb | twice as many x-ray photons |
| In photoelectric absorption to dislodge an inner-shell electron from its atomic orbit, the incoming x-ray photon must be able to transfer a quantity of energy | as large as or larger than the amount of energy that holds the electron in its orbit. |
| Since the density of air is approximately _________________ than that of soft tissue, a given volume of air will interact with far fewer x-ray photons than adjacent regions of soft tissue, thereby permitting more radiation to reach the image receptor. | 1000 times smaller |
| What is the term for the number of x-rays emitted per inner-shell vacancy during the process of photoelectric absorption? | Fluorescent yield |
| What is the effective atomic number of compact bone? | 13.8 |
Created by:
nijahmone