Exam 3 - Bushong Chapters 9, 10, 15, 16,
and 21 well answered to pass
Beam energy is affected by _______________.
a. filtration and mAs.
b. kVp and filtration.
c. mAs and distance.
d. kVp and mAs. - correct answer ✔✔b. kVp and filtration.
Distortion can be reduced by ____________________.
a. placing the object plane parallel to the image plane.
b. increasing the SID and the OID.
c. placing the object plane perpendicular to the image plane.
d. directing the central ray 15° from the object plane. - correct answer ✔✔c.
placing the object plane perpendicular to the image plane.
If the distance from the source to the image (SID) is reduced by half, how is the x-
ray intensity at the image affected?
a. it is reduced by 1/2.
b. it is doubled.
,c. it is reduced by 1/4.
d. it is increased 4 times. - correct answer ✔✔d. it is increased 4 times.
When the mass density of the absorber is _____________, it results in
_____________ Compton scatter.
a. decreased; decreased.
b. decreased; increased.
c. increased; increased.
d. increased; decreased. - correct answer ✔✔c. increased; increased.
During a photoelectric interaction,
a. an outer-shell electron is ejected.
b. an inner-shell electron is ejected.
c. electrons for all levels are ejected.
d. no electrons are ejected. - correct answer ✔✔b. an inner-shell electron is
ejected.
An incident x-ray interacts with an atom without ionization during
______________.
a. photoelectric absorption.
b. pair production.
,c. coherent scattering.
d. Compton scattering. - correct answer ✔✔c. coherent scattering.
When only the intensity needs to be changed, only the _______ should be
adjusted.
a. kVp.
b. filtration.
c. SID.
d. mAs. - correct answer ✔✔d. mAs.
If filter thickness is ________, then x-ray intensity is ________.
a. reduced; increased.
b. reduced; reduced.
c. increased; reduced and reduced; increased.
d. increased; reduced. - correct answer ✔✔c. increased; reduced and reduced;
increased.
K-shell binding energy increases with increasing ____________.
a. kVp.
b. mAs.
c. mass density.
, d. atomic number. - correct answer ✔✔d. atomic number.
A 10% increase in kVp has ________ effect on x-ray intensity than/as a 10%
increase in mAs.
a. much greater.
b. less.
c. the same.
d. much less. - correct answer ✔✔a. much greater.
A high quality radiographic image should always demonstrate ____________.
a. maximum distortion.
b. all structures and tissues.
c. high contrast.
d. minimum magnification. - correct answer ✔✔b. all structures and tissues.
The energy of the photoelectron is equal to:
a. the binding energy of the orbital electron minus the energy of the incident
photon.
b. the energy of the incident photon minus the binding energy of the orbital
electron.
and 21 well answered to pass
Beam energy is affected by _______________.
a. filtration and mAs.
b. kVp and filtration.
c. mAs and distance.
d. kVp and mAs. - correct answer ✔✔b. kVp and filtration.
Distortion can be reduced by ____________________.
a. placing the object plane parallel to the image plane.
b. increasing the SID and the OID.
c. placing the object plane perpendicular to the image plane.
d. directing the central ray 15° from the object plane. - correct answer ✔✔c.
placing the object plane perpendicular to the image plane.
If the distance from the source to the image (SID) is reduced by half, how is the x-
ray intensity at the image affected?
a. it is reduced by 1/2.
b. it is doubled.
,c. it is reduced by 1/4.
d. it is increased 4 times. - correct answer ✔✔d. it is increased 4 times.
When the mass density of the absorber is _____________, it results in
_____________ Compton scatter.
a. decreased; decreased.
b. decreased; increased.
c. increased; increased.
d. increased; decreased. - correct answer ✔✔c. increased; increased.
During a photoelectric interaction,
a. an outer-shell electron is ejected.
b. an inner-shell electron is ejected.
c. electrons for all levels are ejected.
d. no electrons are ejected. - correct answer ✔✔b. an inner-shell electron is
ejected.
An incident x-ray interacts with an atom without ionization during
______________.
a. photoelectric absorption.
b. pair production.
,c. coherent scattering.
d. Compton scattering. - correct answer ✔✔c. coherent scattering.
When only the intensity needs to be changed, only the _______ should be
adjusted.
a. kVp.
b. filtration.
c. SID.
d. mAs. - correct answer ✔✔d. mAs.
If filter thickness is ________, then x-ray intensity is ________.
a. reduced; increased.
b. reduced; reduced.
c. increased; reduced and reduced; increased.
d. increased; reduced. - correct answer ✔✔c. increased; reduced and reduced;
increased.
K-shell binding energy increases with increasing ____________.
a. kVp.
b. mAs.
c. mass density.
, d. atomic number. - correct answer ✔✔d. atomic number.
A 10% increase in kVp has ________ effect on x-ray intensity than/as a 10%
increase in mAs.
a. much greater.
b. less.
c. the same.
d. much less. - correct answer ✔✔a. much greater.
A high quality radiographic image should always demonstrate ____________.
a. maximum distortion.
b. all structures and tissues.
c. high contrast.
d. minimum magnification. - correct answer ✔✔b. all structures and tissues.
The energy of the photoelectron is equal to:
a. the binding energy of the orbital electron minus the energy of the incident
photon.
b. the energy of the incident photon minus the binding energy of the orbital
electron.
