X-ray Production Part 2 Flashcards
How many percent of kinetic energy is converted to heat, and _____ % is converted to electromagnetic energy in the form of x-rays. What do you call these x-rays photons.
99%
1%
Bremsstrahlung X-rays
True or False
X-rays photons that comprise our x-rays beam is heterogeneous which means that it is composed of varying energy levels.
True
True or False
The lower the graph, which means that the most number of x-ray photons emitted per energy level are these energies.
False- highest
This emission spectrum represents the x-ray photons emitted as a result of characteristic interaction.
Discrete Emission Spectrum
This emission spectrum represents the photons emitted as a result of bremsstrahlung interaction.
Continuous Emission Spectrum
The lowest energy is approximately 10-20 KeV, and is a function of _______.
Beam Filtration
True or False
Majority of the x-ray photons are emitted with energies 1/3 of the maximum energy.
True
True or False
Majority of the x-ray photon that comprises the x-ray beam is of bremsstrahlung origin.
True
True or False
The energy of the bremsstrahlung x-rays range from the peak electron energy all the way down to zero.
True
It is a technical factor that controls the filament current. One of the technical factors that is manipulated by the radiologic technologist.
mA
True or False
A decrease in time of exposure results in a proportionate change in the amplitude (height) of the x-ray emission at all energies.
False-increase
True or False
If we double the time of exposure, the quantity of the x-ray photons for all energy level is doubled.
True
It is the technical factor that controls the potential difference applied across the x-ray tube.
kVp
True or False
The amplitude of curve increases at all energies but there is a great decrease at high energies than at low energies.
False- increase
True or False
The increase in the amplitude is not proportionate for all energy levels, but is more pronounced at higher levels.
True
True or False (In kVp)
As the kinetic energy of the projectile electron increases, the chances that they will escape interaction with outer shell electron and hit the inner shell electron or come very close to the nucleus of the target atom also increases. This results to an increase also on the amplitude of the curve, which means an increase in the quantity of x-rays photons produced.
True
It has something to do with the capacity of the x-ray machine, and has something to do with the type of current and voltage being supplied to the x-ray tube.
Voltage Waveform
Operation using high frequency voltage waveform is equivalent to an approximate ____ increase in kVp, and almost a doubling of mAs compared to single-phase power.
12%
It is the process of eliminating low energy x-ray photons that will only be absorbed by the patient body and therefore contribute to patient dose.
Filtration
