HESI RAD V2 EXAM QUESTIONS
& VERIFIED CORRECT
ANSWERS
A step-up transformer with 300 turns in the primary coil is supplied with 220 volts to this
primary. How many secondary turns are needed to produce a 66,000 volt output? - correct
answer ✔✔90,000 turns
What is the result if the total lead content of a grid is decreased? - correct answer
✔✔Decreased scatter absorption.
What is the purpose of shuttering? - correct answer ✔✔To black out areas of light and make
fine details more visible.
In conventional tomography, the radiographer is able to control the thickness of the
tomographic slice by altering which of the following? - correct answer ✔✔Exposure angle.
Which type of exposure technique chart would allow the radiographer to make small, fine
adjustments for orthopedic work? - correct answer ✔✔Variable kilovolts peak (kVp).
An imaging department, having difficulty obtaining acceptable tangential patella images, has
opted to have the post processing mode set to "fixed" for all patella images. Why is this a good
choice? - correct answer ✔✔Fixed mode works well for exams where it is difficult to center the
image on the image receptor (IR).
Pelvis routine calls for an anteroposterior (AP) with a perpendicular central ray (CR), and an axial
AP with a 40 degree cephalic angle. Using a caliper measurement, the technique chart yields a
perfect set of exposure factors for the perpendicular AP. How will the necessary exposure
, factors for the axial differ from the perpendicular AP? - correct answer ✔✔Greater
measurement, higher kilovolts peak (kVp) and milliampere-seconds (mAs).
Which advantage does a 500 milliampere (mA) station have over a 200 mA station? - correct
answer ✔✔Increased photon flux to the image receptor (IR)
A radiographer is performing a portable abdomen is using an image receptor with an 8:1 grid.
The radiographer knows a technique for the abdomen using a 12:1 grid is 80 kilovolts peak
(kVp) using 50 milliampere-seconds (mAs). Which would the new technique be in order to
maintain image quality? - correct answer ✔✔80 kVp @ 40 mAs.
If 7 milliampere-seconds (mAs) provides optimal density without a grid, which mAs should be
used with a 12:1 grid? - correct answer ✔✔35
How does a radiographer maximize signal to digital image receptors? (Select the three that
apply.) - correct answer ✔✔Compression of the body part.
Shorter source to image receptor distance (SID).
Longer exposure time.
What results from utilizing a lower ratio grid? - correct answer ✔✔Lower contrast, but greater
error margin in central ray (CR) placement.
Why is it important for the radiographer to observe the milliampere seconds (mAs) readout at
the end of each exposure when using automatic exposure control (AEC)? - correct answer
✔✔This value may be used as a basis for calculating manual techniques.
How does emphysema impact radiographic imaging of the chest? - correct answer
✔✔Emphysema is a destructive disease, meaning the chest tissue is more radiolucent.
& VERIFIED CORRECT
ANSWERS
A step-up transformer with 300 turns in the primary coil is supplied with 220 volts to this
primary. How many secondary turns are needed to produce a 66,000 volt output? - correct
answer ✔✔90,000 turns
What is the result if the total lead content of a grid is decreased? - correct answer
✔✔Decreased scatter absorption.
What is the purpose of shuttering? - correct answer ✔✔To black out areas of light and make
fine details more visible.
In conventional tomography, the radiographer is able to control the thickness of the
tomographic slice by altering which of the following? - correct answer ✔✔Exposure angle.
Which type of exposure technique chart would allow the radiographer to make small, fine
adjustments for orthopedic work? - correct answer ✔✔Variable kilovolts peak (kVp).
An imaging department, having difficulty obtaining acceptable tangential patella images, has
opted to have the post processing mode set to "fixed" for all patella images. Why is this a good
choice? - correct answer ✔✔Fixed mode works well for exams where it is difficult to center the
image on the image receptor (IR).
Pelvis routine calls for an anteroposterior (AP) with a perpendicular central ray (CR), and an axial
AP with a 40 degree cephalic angle. Using a caliper measurement, the technique chart yields a
perfect set of exposure factors for the perpendicular AP. How will the necessary exposure
, factors for the axial differ from the perpendicular AP? - correct answer ✔✔Greater
measurement, higher kilovolts peak (kVp) and milliampere-seconds (mAs).
Which advantage does a 500 milliampere (mA) station have over a 200 mA station? - correct
answer ✔✔Increased photon flux to the image receptor (IR)
A radiographer is performing a portable abdomen is using an image receptor with an 8:1 grid.
The radiographer knows a technique for the abdomen using a 12:1 grid is 80 kilovolts peak
(kVp) using 50 milliampere-seconds (mAs). Which would the new technique be in order to
maintain image quality? - correct answer ✔✔80 kVp @ 40 mAs.
If 7 milliampere-seconds (mAs) provides optimal density without a grid, which mAs should be
used with a 12:1 grid? - correct answer ✔✔35
How does a radiographer maximize signal to digital image receptors? (Select the three that
apply.) - correct answer ✔✔Compression of the body part.
Shorter source to image receptor distance (SID).
Longer exposure time.
What results from utilizing a lower ratio grid? - correct answer ✔✔Lower contrast, but greater
error margin in central ray (CR) placement.
Why is it important for the radiographer to observe the milliampere seconds (mAs) readout at
the end of each exposure when using automatic exposure control (AEC)? - correct answer
✔✔This value may be used as a basis for calculating manual techniques.
How does emphysema impact radiographic imaging of the chest? - correct answer
✔✔Emphysema is a destructive disease, meaning the chest tissue is more radiolucent.
