EXAM 3-Principles of Radiographic
Imaging with Accurate Solutions
Scatter radiation is of no value in radiographic imaging.
a. true
b. false - correct Answer-true
Beam-restricting devices are located just above the tube housing.
a. true
b. false - correct Answer-false
It is safe to assume that the x-ray beam field size and the light field size are exactly the
same.
a. true
b. false - correct Answer-false
When using automatic collimation, collimating to the anatomy of interest is an
unnecessary waste of time; the beam is already collimated.
a. true
b. false - correct Answer-false
The grid limits the amount of scatter radiation produced in the patient.
a. true
b. false - correct Answer-false
Grids absorb almost all of the scatter radiation and allow all of the transmitted photons
to pass through to the IR.
a. true
b. false - correct Answer-false
Focused grids are more effective than parallel grids in absorbing scatter radiation and
allowing transmitted radiation to reach the IR.
a. true
b. false - correct Answer-true
, Adding a grid or increasing grid ratio results in an increase in patient dose.
a. true
b. false - correct Answer-true
The air gap technique is a frequently used method for reducing the amount of scatter
radiation reaching the IR.
a. true
b. false - correct Answer-false
The grid used for the air gap technique should be high frequency.
a. true
b. false - correct Answer-false
For radiographic procedures, scatter radiation is primarily the result of:
a. photoelectric interaction
b. pair production
c. Compton interaction
d. classical scattering - correct Answer-Compton interaction
The probability of a Compton interaction occurring is related to:
a. the energy of the x-ray photon
b. the atomic number of the matter
c. the mAs used
d. all of the above - correct Answer-the energy of the x-ray photon
The two major factors that affect the amount of scatter radiation produced and exiting
the patient are:
a. kVp and mAs
b. volume of tissue irradiated and mAs
c. volume of tissue irradiated and kVp
d. kVp and the use of a grid - correct Answer-volume of tissue irradiated and kVp
The volume of tissue irradiated is determined by:
a. the area of collimation
b. patient thickness
c. field size
d. all of the above - correct Answer-all of the above
Imaging with Accurate Solutions
Scatter radiation is of no value in radiographic imaging.
a. true
b. false - correct Answer-true
Beam-restricting devices are located just above the tube housing.
a. true
b. false - correct Answer-false
It is safe to assume that the x-ray beam field size and the light field size are exactly the
same.
a. true
b. false - correct Answer-false
When using automatic collimation, collimating to the anatomy of interest is an
unnecessary waste of time; the beam is already collimated.
a. true
b. false - correct Answer-false
The grid limits the amount of scatter radiation produced in the patient.
a. true
b. false - correct Answer-false
Grids absorb almost all of the scatter radiation and allow all of the transmitted photons
to pass through to the IR.
a. true
b. false - correct Answer-false
Focused grids are more effective than parallel grids in absorbing scatter radiation and
allowing transmitted radiation to reach the IR.
a. true
b. false - correct Answer-true
, Adding a grid or increasing grid ratio results in an increase in patient dose.
a. true
b. false - correct Answer-true
The air gap technique is a frequently used method for reducing the amount of scatter
radiation reaching the IR.
a. true
b. false - correct Answer-false
The grid used for the air gap technique should be high frequency.
a. true
b. false - correct Answer-false
For radiographic procedures, scatter radiation is primarily the result of:
a. photoelectric interaction
b. pair production
c. Compton interaction
d. classical scattering - correct Answer-Compton interaction
The probability of a Compton interaction occurring is related to:
a. the energy of the x-ray photon
b. the atomic number of the matter
c. the mAs used
d. all of the above - correct Answer-the energy of the x-ray photon
The two major factors that affect the amount of scatter radiation produced and exiting
the patient are:
a. kVp and mAs
b. volume of tissue irradiated and mAs
c. volume of tissue irradiated and kVp
d. kVp and the use of a grid - correct Answer-volume of tissue irradiated and kVp
The volume of tissue irradiated is determined by:
a. the area of collimation
b. patient thickness
c. field size
d. all of the above - correct Answer-all of the above
