18 Questions
What does exposure time control in radiography?
The duration of the x-ray exposure
How does decreasing the exposure time affect image quality?
It reduces motion artifacts
What parameter is controlled by the product of mA and seconds (mAs)?
Density/image receptor exposure
What happens to patient dose when there is a 50% increase in the number of photons emitted without a change in exposure time?
It increases
How does exposure time affect beam intensity?
It increases beam intensity
What does changing the current to the filament affect in radiography?
The number of electrons released through thermionic emission
What factor determines the intensity of the radiation beam?
Quantity
How does changing the milliampere (mA) setting on the equipment affect the radiation intensity?
It increases the number of photons emitted
What is the unit of measurement for current in radiography?
Coulomb (C)
Which exposure factor controls the duration of radiation exposure?
mAs
What happens to patient dose when the milliampere (mA) is increased without changing exposure time?
Patient dose increases
For radiography, what does mAs represent?
Intensity of the beam
What does the term 'beam penetrability' refer to?
The ability of the X-ray beam to penetrate anatomy
What factors determine the beam quantity or intensity?
mA, kVp, and exposure time
What happens when the current delivered to the filament is changed?
The number of electrons released through thermionic emission increases
What does kilovoltage (kVp) primarily determine in the X-ray beam?
Beam quantity or intensity
What is the unit for measuring current in X-ray equipment?
Ampere (A)
How does increasing the mA from 200 to 300 affect the X-ray beam?
There is a 50% increase in number of photons emitted
This quiz discusses prime exposure factors in radiography, such as kVp, mAs, mA, exposure time, and distance. It covers the concepts of quantity and quality of the X-ray beam, as well as quantitative and qualitative factors influencing the radiographic imaging process.
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