Mosby's NBDHE Exam Tested
Questions With Revised Correct
Detailed Answers
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1. What does window level select - ANSWER
window width
The center CT values of the
2. Window settings of window width 1,500 and window level of -600 might be
used for which of th...
1. What does window level select - ANSWER The center CT values of the
window width
2. Window settings of window width 1,500 and window level of -600 might be
used for which of the following CT examinations? - ANSWER Lung
3. Widening the window width will include a wider range of values by placing
more Hounsfield units into each shade of gray. - ANSWER True
4. If fat is -90 HU and the display window width is set to 100, at what window
level will fat appear white? - ANSWER -150
5. If the window width is 400 and 0 is chosen as the window level, the
Hounsfield values that are represented as a shade of gray on this image will
range from which of the following? - ANSWER -200 to 200
6. What is the window width used to provide maximum detail of bony
structures is approximately - ANSWER 1200 to 2000 HU
,7. If the window width is 300 and 0 is chosen as the window level, the
Hounsfield values that are represented as a shade of gray on this image will
range from which of the following? - ANSWER -150 to 150
8. This determines the number of Hounsfield Units represented on a specific
image. - ANSWER Window width
9. This amount of HU's is a relatively large width allows for complete
visualization of the variable densities present in bony anatomic areas -
ANSWER 1200 to 2000 HU
10. The best method of reducing the risk of contrast-induced nephrotoxicity (CIN)
is - ANSWER adequate patient hydration
11. Which is NOT a synonym for the preliminary image taken at the start of a CT
exam? - ANSWER spiral
12. Which is a synonym for the preliminary image taken at the start of a CT
exam? - ANSWER A. topogram
B. scout
C. scanogram
13. Beam attenuation can be defined as - ANSWER The phenomenon by
which as x-ray beam passing through a structure is decreased in intensity or
amount because of absorption and interaction with matter.
14. Which of the following is a low-attenuation structure - ANSWER trachea
, 15. Which of the following is a HIGH-attenuation structure - ANSWER A.
iodine-filled aorta
B. rib
D. calcified arteries
16. An object is slightly less dense than water. What is the expected Hounsfield
measurement? - ANSWER B. -10
17. The x-ray beam sources for CT produce x-ray energy that is polychromatic.
This means that - ANSWER The beam comprises photons with varying
energies.
18. An object that appears on the image but is not present in the object scanned
is called a (an) - ANSWER Artifact
19. Which is an advantage of filtering the x-ray beam? - ANSWER Filtering
reduces the radiation dose to the patient.
20. Which of the following is another name for raw data? - ANSWER Scan
data
Raw data is which of the following - ANSWER scan data
All the data acquired by the CT system with each scan are called? - ANSWER
Raw data
, This term is used to describe the amount of time it takes to acquire a single frame
of a dynamic process, like cine imaging. - ANSWER temporal resolution
Which of the following is NOT an advantage of dual source CT scanner over a
single source CT scanner - ANSWER *Decreased temporal resoulution
Which of the following is an advantage of dual source CT scanner over a single
source CT scanner - ANSWER *One step bone removal
*Increased temporal resolution
*Differentiation of kidney stones
*Ability to characterize different tissues e.g. tendons and ligament
It is determined that a patient has a stone present in the middle section of the
ureter. Which of these is MOST likely a symptom the patient will exhibit?
A stone in the middle section of the ureter will likely cause - ANSWER
anterior abdominal pain and flank pain
IMAGE IS FLANK PAIN
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