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JEOPARDY X-ray Emiss
Topic 10 rad 140 x-ray emmission
| Question | Answer |
|---|---|
| Amount of x-ray energy absorbed by matter | What is absorbed dose ? |
| Name given to the beam as it exits the x-ray tube. | What is the “primary” beam ? |
| This is the portion of the beam that continues on to produce the image after x-ray interacts with the body. | What is the “remnant” or “exit” beam? |
| Determines which interaction will take place when x-ray interacts with matter. | What is x-ray “energy |
| Particle of matter which is the site of x-ray interactions | What is an “atom” |
| Reduction in the number of x-ray photons as the beam passes through matter. | What is “attenuation” |
| Area within matter affected by low energy x-ray interaction | What is the whole atom? |
| Area within matter affected by medium energy x-ray interaction. | What are “orbital electrons” |
| Area within matter affected by high energy x-ray interaction. | What is the “nucleus” ? |
| The thickness of material that attenuates an x-ray beam by 50%. | What is “half value layer” ? |
| X-Ray interaction that primarily occurs at < 70 kVp with K-shell electrons. | What is the photoelectric effect ? |
| 1.02 meV x-ray interacts with the nucleus of an atom | What is pair production ? |
| This low energy interaction causes the atom to vibrate at the same frequency as the x-ray. | What is Coherent Scattering ? |
| Moderate energy x-ray dislodges an outer shell electron, but continues on at a lower energy. | What is Compton Scattering ? |
| This interaction is directly related to patient absorbed dose. | What is photoelectric effect ? |
| As x-ray photons pass through the body, these 2 things can result to the photons that DO NOT pass through to form the image. | What are “total absorption” and “scatter” ? |
| This interaction results is the “annihilation reaction”. | What is Pair Production ? |
| Results in a scattered x-ray photon having the same energy as the incident photon. | What is Coherent Scattering ? |
| Results in total absorption of the incident photon. | What is the photoelectric effect ? |
| Percent of scattered radiation produced in diagnostic x-ray by Compton interactions. | What is > 95% ? |
| Percent of x-ray that is transmitted to the image receptor after passing through the abdomen | What is less than 1% ? |
| The cascading of electrons filling vacant shells in the PE interaction results in this type of radiation. | What is “characteristic radiation” ? |
| Two factors that increase the likelihood of a photoelectric interaction. | What are low energy x-ray and high atomic number ? |
| Contributes to increased operator and patient exposure. | What is Compton scattering ? |
| Highly unstable piece of antimatter that is produced during Pair Production. | What is a positron ? |
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