Bushong final
What percentage of kVp adjustment doubles the density on an image?
Selected Answer:
a. 30%
b. 5%
c. 15%
d. 100% - answerc
Contrast resolution is improved by _____.
a. tight collimation
b. lowering kVp
c. patient compression
d. all of the above - answerd
The most commonly used beam restricting device is the _____.
a. variable collimator
b. compression device
c. aperture diaphragm
d. extension cone - answera
Dense bones
a. High subject contrast
b. Low subject contrast - answera
Scatter radiation increases as _____ increases.
a. contrast
b. photoelectric absorption
c. filtration
d. field size - answerd
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. - answerd
, 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. - answerd
Photoelectric interactions increase when _____ is decreased.
a. patient thickness
b. filtration
c. mAs
d. kVp - answerd
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 - answerb
Decreasing the kVp will increase _____.
a. Compton scatter
b. patient dose
c. optical density
d. image noise - answerb
Three primary factors influencing the intensity of scatter in the image-forming beam are
______.
a. MAS, kVp, and collimation
b. MAS, filtration, and grids
c. KVP, field size, and patient thickness
d. Filtration, Patient thickness, and mAs - answerc
Compton scatter contributes to _____.
a. useful information
b. image noise
c. image contrast
d. all of the above - answerb
Image-forming x-rays include those which have been _____.
a. transmitted without interaction
What percentage of kVp adjustment doubles the density on an image?
Selected Answer:
a. 30%
b. 5%
c. 15%
d. 100% - answerc
Contrast resolution is improved by _____.
a. tight collimation
b. lowering kVp
c. patient compression
d. all of the above - answerd
The most commonly used beam restricting device is the _____.
a. variable collimator
b. compression device
c. aperture diaphragm
d. extension cone - answera
Dense bones
a. High subject contrast
b. Low subject contrast - answera
Scatter radiation increases as _____ increases.
a. contrast
b. photoelectric absorption
c. filtration
d. field size - answerd
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. - answerd
, 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. - answerd
Photoelectric interactions increase when _____ is decreased.
a. patient thickness
b. filtration
c. mAs
d. kVp - answerd
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 - answerb
Decreasing the kVp will increase _____.
a. Compton scatter
b. patient dose
c. optical density
d. image noise - answerb
Three primary factors influencing the intensity of scatter in the image-forming beam are
______.
a. MAS, kVp, and collimation
b. MAS, filtration, and grids
c. KVP, field size, and patient thickness
d. Filtration, Patient thickness, and mAs - answerc
Compton scatter contributes to _____.
a. useful information
b. image noise
c. image contrast
d. all of the above - answerb
Image-forming x-rays include those which have been _____.
a. transmitted without interaction
