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Stack #4692345

QuestionAnswer
define x-ray intensity Number of x-rays in the useful beam
What is the relationship between mAs and X-ray intensity? Directly proportional
What is the relationship between kVp and X-ray intensity? Proportional to kVp^2
What does adding filtration do? Reduces patient radiation dose by removing low energy photons
define coherent scattering? Little importance in diagnostic imaging
Define compton scattering Interaction with outer-shell electrons that scatters x-rays, reduces its energy and ionizes the atom (reduces image contarst)
Define photoelectric effect Interaction with inner-shell electrons that is totally absorbed
Define pair production Interaction between the x-ray and the nuclear field (x-rays disappear) then two electron-like particles appear in place.
Why does differential absorption occur? Compton scattering, photoelectric effect, and x0rays transmitted through the patient
Why are barium and iodine used in contrast? High atomic number and high mass density to help image internal organs with x-rays
What does differential absorption depend on? Atomic number (Z)
What is Attentuation? Product of absorption and scattering
Contrast agents is Also known as ? Positive contrast agents
Describe bow tie filter Thicker edge one side and thinner edge on other side
what is bow tie filter used in? CT
Created by: Aaliyah602
 

 



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