Quality Control Exam Questions with
100% Verified Answers
Passing criteria for a class 1 LCD monitor, per AAPM: - ✔ ✔ -15 or fewer bad
pixels across entire screen.
-3 or fewer bad pixels within a 1cm circle.
-3 or fewer bad adjacent pixels.
*less stringent guideline for class 2 monitors.
Major disadvantage of LCDs is the rapid ______ of luminance at increasing
viewing angles. - ✔ ✔ Loss.
More expensive LCDs use what to increase the viewing angles? - ✔ ✔
Pixel elements that are slightly angled
VAD stands for what? - ✔ ✔ Viewing angle dependence.
VAD is measured how? - ✔ ✔ Photometer at a precisely maintained distance
from the center of the monitor screen, as a % of the perpendicular luminance.
How should the stability of the self-calibrating LCDs be monitored: - ✔ ✔
Everyday for 1st week.
, Every week for first month.
Every month for first quarter.
View box illuminates use what type of bulbs? - ✔ ✔ 2x 15-watt light bulbs behind
a light diffusing panel.
*bulbs should be regularly replaced. And surface of panel should be
regularly cleaned and checked for stains, cracks, or artifacts.
What is the greatest reason for repeats, this day in age? - ✔ ✔ Positioning errors.
*DR has reduced the rate of repeats due to poor technical quality.
In DR systems rejected images are usually ________, so there is no way of
tracking them and following up with repeat analysis. - ✔ ✔ Erased
and permanently lost.
What are a few categories in a DR system, to log for reasons for rejected images:
- ✔ ✔ -PACS problem.
-X-ray equipment problem.
-positioning error.
Some manufactures are beginning to incorporate specific software for what? -
✔ ✔ Repeat analysis.
A realistic target for XR depts is to maintain overall repeat rate due to
technologist errors at what %? - ✔ ✔ 3-5%
100% Verified Answers
Passing criteria for a class 1 LCD monitor, per AAPM: - ✔ ✔ -15 or fewer bad
pixels across entire screen.
-3 or fewer bad pixels within a 1cm circle.
-3 or fewer bad adjacent pixels.
*less stringent guideline for class 2 monitors.
Major disadvantage of LCDs is the rapid ______ of luminance at increasing
viewing angles. - ✔ ✔ Loss.
More expensive LCDs use what to increase the viewing angles? - ✔ ✔
Pixel elements that are slightly angled
VAD stands for what? - ✔ ✔ Viewing angle dependence.
VAD is measured how? - ✔ ✔ Photometer at a precisely maintained distance
from the center of the monitor screen, as a % of the perpendicular luminance.
How should the stability of the self-calibrating LCDs be monitored: - ✔ ✔
Everyday for 1st week.
, Every week for first month.
Every month for first quarter.
View box illuminates use what type of bulbs? - ✔ ✔ 2x 15-watt light bulbs behind
a light diffusing panel.
*bulbs should be regularly replaced. And surface of panel should be
regularly cleaned and checked for stains, cracks, or artifacts.
What is the greatest reason for repeats, this day in age? - ✔ ✔ Positioning errors.
*DR has reduced the rate of repeats due to poor technical quality.
In DR systems rejected images are usually ________, so there is no way of
tracking them and following up with repeat analysis. - ✔ ✔ Erased
and permanently lost.
What are a few categories in a DR system, to log for reasons for rejected images:
- ✔ ✔ -PACS problem.
-X-ray equipment problem.
-positioning error.
Some manufactures are beginning to incorporate specific software for what? -
✔ ✔ Repeat analysis.
A realistic target for XR depts is to maintain overall repeat rate due to
technologist errors at what %? - ✔ ✔ 3-5%
