RADR 2305 - Radiographic Imaging and
Exposure - Chapter 6 Questions and Answers
(100% Correct Answers) Already Graded A+
What are the primary exposure technique factors? [ Ans: ]
mA, exposure time, kVp, and SID
mAs is directly proportional to: [ Ans: ] The quantity of x-
rays produced
Exposure to the IR can be increased or decreased by
adjusting what primary exposure technique factor? [ Ans:
] mAs
As mAs increases, the quantity of radiation reaching the IR
________. [ Ans: ] Increases
As mAs decreases, the amount of radiation reaching the IR
_________. [ Ans: ] Decreases
What is the mathematical formula for mAs? [ Ans: ] mAs =
mA x s
The exposure factors for a portable chest x-ray is 200 mA
with an exposure time of 0.100 s. What is the overall mAs?
[ Ans: ] 20 mAs
Which of the following mA and exposure time produces 12
mAs? [ Ans: ] 400 mA at 0.03 s
,What relationship exists between mA and exposure time? [
Ans: ] Inverse proportional relationship
As mA increases, exposure time _________. [ Ans: ]
Decreases
As mA decreases, exposure time ________. [ Ans: ]
Increases
What is the conversion from milliseconds to seconds? [
Ans: ] 1,000 ms = 1 s
If you have a 200 ms exposure time, what would it be in
seconds? [ Ans: ] 0.2 s
Assuming all produce appropriate diagnostic images,
which of the following would be the best exposure
technique choice when performing a chest radiograph on
an infant? [ Ans: ] 40 ms exposure time
mAs controls the amount of brightness displayed in a
digital image; true or false? [ Ans: ] False; computer
processing does
Which of the following is correct regarding the effect mAs
has on the displayed digital image? [ Ans: ] Does not
control brightness
A lower-than-needed mAs produces an image with
increased quantum noise; true or false? [ Ans: ] True
, Using twice as much mAs as needed will result in: [ Ans: ]
Adequate image brightness and unnecessary patient
exposure
As compared to a three-phase x-ray unit, a single-phase
unit requires higher exposure techniques to produce a
comparable image; true or false? [ Ans: ] True
Exposure indicator [ Ans: ] A numerical value that is
displayed on a processed image to indicate the level of x-
ray exposure received on the digital IR
If the exposure indicator falls outside of the
manufacturer's suggested range, exposure to the digital
IR, image quality, and ___________ are affected. [ Ans: ]
Patient exposure
The exposure indicator value reflects excessive exposure
to the IR. Which of the following is the best for correcting
the exposure error? [ Ans: ] Decrease mAs by 50%
Generally, for repeat images necessitated by exposure
factors, the mAs is adjusted by a factor of _____. [ Ans: ] 2
Which exposure factor affects both the quality and
quantity of the x-ray beam? [ Ans: ] kVp
Changes in kVp do not affect the exposure indicator value;
true or false? [ Ans: ] False
Exposure - Chapter 6 Questions and Answers
(100% Correct Answers) Already Graded A+
What are the primary exposure technique factors? [ Ans: ]
mA, exposure time, kVp, and SID
mAs is directly proportional to: [ Ans: ] The quantity of x-
rays produced
Exposure to the IR can be increased or decreased by
adjusting what primary exposure technique factor? [ Ans:
] mAs
As mAs increases, the quantity of radiation reaching the IR
________. [ Ans: ] Increases
As mAs decreases, the amount of radiation reaching the IR
_________. [ Ans: ] Decreases
What is the mathematical formula for mAs? [ Ans: ] mAs =
mA x s
The exposure factors for a portable chest x-ray is 200 mA
with an exposure time of 0.100 s. What is the overall mAs?
[ Ans: ] 20 mAs
Which of the following mA and exposure time produces 12
mAs? [ Ans: ] 400 mA at 0.03 s
,What relationship exists between mA and exposure time? [
Ans: ] Inverse proportional relationship
As mA increases, exposure time _________. [ Ans: ]
Decreases
As mA decreases, exposure time ________. [ Ans: ]
Increases
What is the conversion from milliseconds to seconds? [
Ans: ] 1,000 ms = 1 s
If you have a 200 ms exposure time, what would it be in
seconds? [ Ans: ] 0.2 s
Assuming all produce appropriate diagnostic images,
which of the following would be the best exposure
technique choice when performing a chest radiograph on
an infant? [ Ans: ] 40 ms exposure time
mAs controls the amount of brightness displayed in a
digital image; true or false? [ Ans: ] False; computer
processing does
Which of the following is correct regarding the effect mAs
has on the displayed digital image? [ Ans: ] Does not
control brightness
A lower-than-needed mAs produces an image with
increased quantum noise; true or false? [ Ans: ] True
, Using twice as much mAs as needed will result in: [ Ans: ]
Adequate image brightness and unnecessary patient
exposure
As compared to a three-phase x-ray unit, a single-phase
unit requires higher exposure techniques to produce a
comparable image; true or false? [ Ans: ] True
Exposure indicator [ Ans: ] A numerical value that is
displayed on a processed image to indicate the level of x-
ray exposure received on the digital IR
If the exposure indicator falls outside of the
manufacturer's suggested range, exposure to the digital
IR, image quality, and ___________ are affected. [ Ans: ]
Patient exposure
The exposure indicator value reflects excessive exposure
to the IR. Which of the following is the best for correcting
the exposure error? [ Ans: ] Decrease mAs by 50%
Generally, for repeat images necessitated by exposure
factors, the mAs is adjusted by a factor of _____. [ Ans: ] 2
Which exposure factor affects both the quality and
quantity of the x-ray beam? [ Ans: ] kVp
Changes in kVp do not affect the exposure indicator value;
true or false? [ Ans: ] False
