CT Registry Safety Exam Latest Update With Complete
Solutions
1. What will happen to the CT image if either the
nothing
mAs or kVp setting is too high?
-the scanner will not allow the exposure to be
made
-the image is light
-the image is dark
-nothing
decreased attenuation
2. Increasing the kilovoltage peak (kVp) for a CT
proce- dure results in
-increased attenuation
-decreased attenuation
-no change in attenuation
3. Which of these radiation interactions DO NOT result in coherent
scattering
ionization of an atom?
-coherent scattering
-photoelectric absorption
-compton scattering
4. Which of the following is NOT used to reduce -cancer
beam hardening?
-increasing kVp
-beam hardening correction software
-increased mAs
-filtration
5. Which of the following effects may occur in
patients receiving a very small dose of
radiation?
-cataracts
-epilation
-skin burns
, CT Registry Safety Exam Latest Update With Complete
Solutions
increased mAs
cancer
, CT Registry Safety Exam Latest Update With Complete
Solutions
6. What is the function of a source collimator? it is located near the
-it is located below the patient and above the detector x-ray source
and limits the
array and ensures that the beam is the proper -abdomen
width as it enters the detector
-it is located near the x-ray source and limits
the amount of x-ray beams emerging to thin
ribbons
-it measures the intensity of transmitted x-ray
radia- tion along a beam projected from the x-
ray source to the patient
-it reduces the intensity of the periphery of the
beam, corresponding to the thinner areas of a
patient's anatomy
7. Why is it more common practice to manipulate
mAs, rather than the kVp, when modifying
the radiation dose?
-on most scanners, the kVp setting cannot be
changed
-the effect on image quality is more
straightforward and predictable
-the kVp setting does not affect the radiation
dose
-changing the kVp by even a small amount will
result in x-ray photons that are too weak to
penetrate the patient
8. The radiation dose at the center of the cross
sectional slice will be closest to the dose at
the periphery for scans of the
-chest
-head
-pelvis
, CT Registry Safety Exam Latest Update With Complete
Solutions
amount of x-ray beams emerging to thin ribbons
the ettect on image quali- ty is more straightforward and predictable
head
Solutions
1. What will happen to the CT image if either the
nothing
mAs or kVp setting is too high?
-the scanner will not allow the exposure to be
made
-the image is light
-the image is dark
-nothing
decreased attenuation
2. Increasing the kilovoltage peak (kVp) for a CT
proce- dure results in
-increased attenuation
-decreased attenuation
-no change in attenuation
3. Which of these radiation interactions DO NOT result in coherent
scattering
ionization of an atom?
-coherent scattering
-photoelectric absorption
-compton scattering
4. Which of the following is NOT used to reduce -cancer
beam hardening?
-increasing kVp
-beam hardening correction software
-increased mAs
-filtration
5. Which of the following effects may occur in
patients receiving a very small dose of
radiation?
-cataracts
-epilation
-skin burns
, CT Registry Safety Exam Latest Update With Complete
Solutions
increased mAs
cancer
, CT Registry Safety Exam Latest Update With Complete
Solutions
6. What is the function of a source collimator? it is located near the
-it is located below the patient and above the detector x-ray source
and limits the
array and ensures that the beam is the proper -abdomen
width as it enters the detector
-it is located near the x-ray source and limits
the amount of x-ray beams emerging to thin
ribbons
-it measures the intensity of transmitted x-ray
radia- tion along a beam projected from the x-
ray source to the patient
-it reduces the intensity of the periphery of the
beam, corresponding to the thinner areas of a
patient's anatomy
7. Why is it more common practice to manipulate
mAs, rather than the kVp, when modifying
the radiation dose?
-on most scanners, the kVp setting cannot be
changed
-the effect on image quality is more
straightforward and predictable
-the kVp setting does not affect the radiation
dose
-changing the kVp by even a small amount will
result in x-ray photons that are too weak to
penetrate the patient
8. The radiation dose at the center of the cross
sectional slice will be closest to the dose at
the periphery for scans of the
-chest
-head
-pelvis
, CT Registry Safety Exam Latest Update With Complete
Solutions
amount of x-ray beams emerging to thin ribbons
the ettect on image quali- ty is more straightforward and predictable
head
