Bushong final (questions with complete
solutions) A+ rated
What percentage of kVp adjustment doubles the density on an image?
Selected Answer:
a. 30%
b. 5%
c. 15%
d. 100% - correct answer ✔✔c
Contrast resolution is improved by _____.
a. tight collimation
b. lowering kVp
c. patient compression
d. all of the above - correct answer ✔✔d
The most commonly used beam restricting device is the _____.
a. variable collimator
b. compression device
,c. aperture diaphragm
d. extension cone - correct answer ✔✔a
Dense bones
a. High subject contrast
b. Low subject contrast - correct answer ✔✔a
Scatter radiation increases as _____ increases.
a. contrast
b. photoelectric absorption
c. filtration
d. field size - correct answer ✔✔d
Elongation occurs in all the following situations, except when
a. the part is off-center.
b. the central ray and part are perpendicular but the IR is angled.
c. the central ray is angled with the part.
d. the central ray and IR are perpendicular and the part is angled. - correct answer
✔✔d
Good collimation practices will do all the following except
, a. reduce digital radiography histogram analysis errors.
b. affect the amount of scatter radiation that reaches the IR.
c. decrease radiation dosage.
d. reduce the visibility of recorded details. - correct answer ✔✔d
Photoelectric interactions increase when _____ is decreased.
a. patient thickness
b. filtration
c. mAs
d. kVp - correct answer ✔✔d
An overexposed image will result if the chosen ionization chamber is located
beneath a structure that has a lower atomic number, or is thinner or less dense
than the structure of interest.
a. True
b. False - correct answer ✔✔b
Decreasing the kVp will increase _____.
a. Compton scatter
b. patient dose
solutions) A+ rated
What percentage of kVp adjustment doubles the density on an image?
Selected Answer:
a. 30%
b. 5%
c. 15%
d. 100% - correct answer ✔✔c
Contrast resolution is improved by _____.
a. tight collimation
b. lowering kVp
c. patient compression
d. all of the above - correct answer ✔✔d
The most commonly used beam restricting device is the _____.
a. variable collimator
b. compression device
,c. aperture diaphragm
d. extension cone - correct answer ✔✔a
Dense bones
a. High subject contrast
b. Low subject contrast - correct answer ✔✔a
Scatter radiation increases as _____ increases.
a. contrast
b. photoelectric absorption
c. filtration
d. field size - correct answer ✔✔d
Elongation occurs in all the following situations, except when
a. the part is off-center.
b. the central ray and part are perpendicular but the IR is angled.
c. the central ray is angled with the part.
d. the central ray and IR are perpendicular and the part is angled. - correct answer
✔✔d
Good collimation practices will do all the following except
, a. reduce digital radiography histogram analysis errors.
b. affect the amount of scatter radiation that reaches the IR.
c. decrease radiation dosage.
d. reduce the visibility of recorded details. - correct answer ✔✔d
Photoelectric interactions increase when _____ is decreased.
a. patient thickness
b. filtration
c. mAs
d. kVp - correct answer ✔✔d
An overexposed image will result if the chosen ionization chamber is located
beneath a structure that has a lower atomic number, or is thinner or less dense
than the structure of interest.
a. True
b. False - correct answer ✔✔b
Decreasing the kVp will increase _____.
a. Compton scatter
b. patient dose
