Radt 146 Quiz 8 - Beam limiting Device
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10 Terms
As Scatter Increases , radiographic density .....
Increases
As the radiation field size decreases , scatter .....
Decreases
What part of the useful beam will you find the most blur (penumbra)
at the edges of the beam
As the tissue thickness decreases , scatter ....
Decreases
What is the radiation called that is not produced at the focal spot ( target ) ?
Stem Radiation / extra focal
What is the main advantage of a positive beam limiter ( BML )
you can't go longer than image decector
What happens to patient exposure when the field size increases ...
Increases
What happens to detail when field size decreases ....
Increases
What is the purpose of the lower set of shutters on an automatic collimator ?
Lower is blur
what happens to radiographic contrast as scatter radiation is increased ?
Decreased
Note 
Flashcards (54)