Flashcards in Physics Quiz 4/9/2015 Deck (18)
an interaction in which a filament electron removes an orbital electron from an atom; to regain stability, an outer-shell electron fill the vacancy, giving up its excess energy as a
an interaction in which a filament electron is attracted to the nucleus, causing it to slow down and change direction. The energy loss is emitted as a
refers to the total number of x-ray photons in a beam
states that the intensity of a beam is inversely proportional to the square of the distance
Inverse Square Law:
refers to the penetrating power of the x-ray beam
refers to those x-ray photons that are transmitted through the body & reach the IR
defined as the thickness of absorbing material (aluminum (Al) or aluminum equivalent filtration) necessary to reduce the energy of the beam to one-half its original intensity
refers to the x-ray beam as it exits the collimator
refers to the x-ray beam that remains after interaction with the patient & is exiting the patient to expose the IR
graphically illustrates the x-ray beam
graphic representation of characteristic x-ray production (straight up, straight down)
Discrete Emission Spectrum:
graphic representation of bremsstrahlung x-ray production
Continuous Emission Spectrum:
Know how mAs affects Beam quantity?
increase mAs increase quantity
How does kVp affect beam quantity?
Varies as the square of the ratio of the change in kVp
If kVp is doubled, the intensity (quantity) increases by a factor of four
How does filtration affect beam quantity?
How does distance affect beam quantity?
How does kVp affect Beam quality?
Increase kVp, increase quality