LMRT ARRT EXAM questions with
verified answers.
Roentgen discovered x-rays while working with a _____ tube? ~CORRECT
ANSWER~✓✓Crookes
An "electron cloud" surrounding the filament of the cathode is referred to
as a ~CORRECT ANSWER~✓✓Space charge
Free electrons of X-ray production come from the ~CORRECT
ANSWER~✓✓Filament
The creation of the space charge in the X-ray tube produces: ~CORRECT
ANSWER~✓✓thermionic emission
The majority of photons in the X-ray beam are created by which process?
~CORRECT ANSWER~✓✓Bremsstrahlung interactions
More than 99% of the energy of the electron stream is converted into:
~CORRECT ANSWER~✓✓heat
the high-speed rotation (10,000 rpm) of the anode enables ~CORRECT
ANSWER~✓✓Greater dissipation of heat from high technical factors
,The degree of angulation of the x-ray tube target will determine the:
~CORRECT ANSWER~✓✓size of the actual and effective focal spot
A dual-focus X-ray tube has:
1: Two filaments
2: Two focal spot sizes
3: Two anodes ~CORRECT ANSWER~✓✓1 and 2
The anode heel effect is a phenomenon of X-ray production that results in:
~CORRECT ANSWER~✓✓Uneven distribution of radiation within the x-
ray field
The penetrating power of the X-ray beam is controlled by varying the
~CORRECT ANSWER~✓✓Peak kilovoltage (kVp)
The rate flow of current flow across the X-ray tube is measured in
~CORRECT ANSWER~✓✓mA
Doubling the mA will result in
1: increased patient dose
2: twice as many photons in the X-ray beam
, 3: increased radiographic density ~CORRECT ANSWER~✓✓1, 2, and 3
The unit used to indicate the total quantity of X-ray expose is ~CORRECT
ANSWER~✓✓Millionsampere-seconds (mAs)
The device for removing long-wavelength radiation from the primary X-
ray beam is the ~CORRECT ANSWER~✓✓Filter
X-ray equipment capable of producing 70 kVp or more is required to have
total filtration of at least: ~CORRECT ANSWER~✓✓2.5 mm Al equiv
The purpose of rotating the anode of the X-ray tube is to ~CORRECT
ANSWER~✓✓Increase the heat capacity of the anode
Image sharpness is determined by the ~CORRECT ANSWER~✓✓Size of
the effective focal spot
Above 70 kVp, what percentage of photons is created by the
bremsstrahlung process? ~CORRECT ANSWER~✓✓85%
The amount detail seen in the X-ray image is referred to as ~CORRECT
ANSWER~✓✓spatial resolution
verified answers.
Roentgen discovered x-rays while working with a _____ tube? ~CORRECT
ANSWER~✓✓Crookes
An "electron cloud" surrounding the filament of the cathode is referred to
as a ~CORRECT ANSWER~✓✓Space charge
Free electrons of X-ray production come from the ~CORRECT
ANSWER~✓✓Filament
The creation of the space charge in the X-ray tube produces: ~CORRECT
ANSWER~✓✓thermionic emission
The majority of photons in the X-ray beam are created by which process?
~CORRECT ANSWER~✓✓Bremsstrahlung interactions
More than 99% of the energy of the electron stream is converted into:
~CORRECT ANSWER~✓✓heat
the high-speed rotation (10,000 rpm) of the anode enables ~CORRECT
ANSWER~✓✓Greater dissipation of heat from high technical factors
,The degree of angulation of the x-ray tube target will determine the:
~CORRECT ANSWER~✓✓size of the actual and effective focal spot
A dual-focus X-ray tube has:
1: Two filaments
2: Two focal spot sizes
3: Two anodes ~CORRECT ANSWER~✓✓1 and 2
The anode heel effect is a phenomenon of X-ray production that results in:
~CORRECT ANSWER~✓✓Uneven distribution of radiation within the x-
ray field
The penetrating power of the X-ray beam is controlled by varying the
~CORRECT ANSWER~✓✓Peak kilovoltage (kVp)
The rate flow of current flow across the X-ray tube is measured in
~CORRECT ANSWER~✓✓mA
Doubling the mA will result in
1: increased patient dose
2: twice as many photons in the X-ray beam
, 3: increased radiographic density ~CORRECT ANSWER~✓✓1, 2, and 3
The unit used to indicate the total quantity of X-ray expose is ~CORRECT
ANSWER~✓✓Millionsampere-seconds (mAs)
The device for removing long-wavelength radiation from the primary X-
ray beam is the ~CORRECT ANSWER~✓✓Filter
X-ray equipment capable of producing 70 kVp or more is required to have
total filtration of at least: ~CORRECT ANSWER~✓✓2.5 mm Al equiv
The purpose of rotating the anode of the X-ray tube is to ~CORRECT
ANSWER~✓✓Increase the heat capacity of the anode
Image sharpness is determined by the ~CORRECT ANSWER~✓✓Size of
the effective focal spot
Above 70 kVp, what percentage of photons is created by the
bremsstrahlung process? ~CORRECT ANSWER~✓✓85%
The amount detail seen in the X-ray image is referred to as ~CORRECT
ANSWER~✓✓spatial resolution
