Chapter 10: Quality Assurance in the Dental Office
Iannucci: Dental Radiography, 5th Edition
MULTIPLE CHOICE
1. A calibration test for accurate kilovoltage and milliamperage readings would most likely be
performed to ensure that the dental ____________ is functioning properly.
a.
x-ray machine
b.
film
c.
film processing
d.
darkroom
2. According to the test for dental x-ray film, if the processed film appears clear with a slight
blue tint, the film
a.
has expired.
b.
is fresh and has been properly stored and protected.
c.
has been improperly stored.
d.
has been exposed to radiation.
3. During your monthly check of the panoramic cassette, you notice that one of the intensifying
screens is scratched. What should you do?
a.
Clean the screen with commercially available cleaner.
b.
Apply an antistatic solution.
c.
Replace the screen.
d.
Polish the screen before using it.
4. You are creating a cleaning log for the panoramic intensifying screens. How frequently should
the screens be cleaned?
a.
Daily
b.
Weekly
c.
Monthly
d.
Yearly
5. A film-screen contact test is used to test the
a.
output of the x-ray machine.
b.
quality of intraoral films.
c.
cassette holder for extraoral films.
d.
freshness of extraoral film.
6. Where would you place the wire mesh if you were conducting a film-screen test?
a.
On top of the loaded cassette
b.
On the side of the film closest to the tubehead within the loaded cassette
c.
On the side of the film farthest from the tubehead within the loaded cassette
d.
Over the end of the PID
7. Where is the best place for you to view the radiograph that you used for the film screen
contact test?
a.
Dimly lit room at a distance of 1 foot from the viewbox.
b.
Brightly lit room at a distance of 1 foot from the viewbox.
c.
Dimly lit room at a distance of 6 feet from the viewbox.
d.
Brightly lit room at a distance of 6 feet from the viewbox.
8. To conduct the film-screen contact test, the position-indicating device (PID) should have a
____-inch target-film distance.
a.
6
b.
12
c.
40
d.
72
9. Which of the following statements is true of the evaluation of the film-screen contact test?
a.
Areas of poor film-screen contact appear darker than good contact areas.
b.
Areas of poor film-screen contact appear lighter than good contact areas.
c.
If the wire mesh image on the film exhibits varying densities, good film-screen
contact has taken place.
d.
Both a and c.
10. The viewbox should emit a uniform and subdued light when it is functioning properly.
Permanently discolored Plexiglas surfaces and blackened fluorescent light bulbs must be
replaced.
a.
Both statements are true.
b.
Both statements are false.
c.
The first statement is true; the second statement is false.
d.
The first statement is false; the second statement is true.
11. You are performing a light leak test in the darkroom, which of the following would you do?
a.
Use a flashlight to check for light leaks.
b.
Turn the overhead lights off, and turn the safelight on.
c.
Turn all darkroom lights off.
d.
Light a match within the darkroom to see if any light is visible from the outside.
12. In order to perform the safelighting test, you would use ___________.
a.
a wire mesh
b.
fogging
c.
a coin
d.
a stepwedge
13. To perform the coin test, the film and coin are exposed to
a.
the safelight.
b.
the darkroom ceiling or white light.
c.
the light with the darkroom door open.
d.
no light at all.
14. To conduct the coin test, the film and coin are exposed for
a.
10 seconds.
b.
3 or 4 minutes.
c.
15 minutes.
d.
an entire workday.
15. If the image of the coin appears on the processed radiograph after the coin test
a.
the safelight is safe to use with that type of film.
b.
the safelight is not safe to use with that type of film.
c.
conduct the test again with the darkroom door closed rather than open.
d.
conduct the test again with the safelight off rather than on.
16. To test the automatic film processor, ____________ in the automatic processor.
a.
unwrap one film, expose it to light, and then process the film
b.
unwrap one film, do not expose it to light, and then process the film
c.
unwrap two unexposed films, expose one to light, and then process the exposed
film
d.
unwrap two unexposed films, expose one to light, and then process both films
17. If the processor is functioning properly, the results of the automatic processor test films will
be that
a.
the unexposed film appears clear and dry, and the film exposed to light appears
black and dry.
b.
the unexposed film appears clear and wet, and the film exposed to light appears
black and wet.
c.
the unexposed film appears black and dry, and the film exposed to light appears
clear and dry.
d.
the unexposed film appears black and wet, and the film exposed to light appears
clear and wet.
18. A reference radiograph is used to evaluate
a.
the viewbox.
b.
darkroom lighting.
c.
safelighting.
d.
developer strength.
19. To create a reference radiograph, which of the following must be fresh?
1. Film
2. Developer
3. Fixer
a.
1, 2, 3
b.
1, 2
c.
2, 3
d.
1 only
20. Prior to using the developer each day, you compare the reference radiograph to a test film that
you develop to check to see if the developer chemicals are depleted. What are you comparing
when you look at the two films?
a.
Milliamperage
b.
kVp
c.
Color
d.
Density
21. If the densities seen on the test film appear lighter than those seen on the reference
radiographs, the developer solution is (1) weak, (2) too concentrated, (3) cold, and/or (4) too
warm.
a.
1 and 3
b.
1 and 4
c.
2 and 3
d.
2 and 4
22. The stepwedge technique for evaluating developer strength relies on exposing one exposed
stepwedge film
a.
each day.
b.
each week.
c.
every time 20 films have been processed.
d.
every time 40 films have been processed.
23. When the stepwedge technique is used to evaluate developer strength, and the density on the
daily radiograph differs from that on the standard radiograph by more than __________ steps,
the developer solution is depleted.
a.
two
b.
three
c.
five
d.
seven
24. The clearing test is used to monitor
a.
developer strength.
b.
fixer strength.
c.
water bath temperature.
d.
processing speed.
25. If the film clears in ____ minutes, the chemistry is of adequate strength.
a.
2
b.
6
c.
8
d.
14
26. How frequently should you monitor the digital imaging equipment in your office?
a.
Weekly
b.
Monthly
c.
Yearly
d.
Based on manufacturer specifications
27. 1. Quality assurance monitoring includes a detailed log of all tests performed. 2. A monitoring
schedule should be posted in the dental office.
a.
Both statements are true.
b.
Both statements are false.
c.
The first statement is true; the second statement is false.
d.
The first statement is false; the second statement is true.
28. Your dental office should monitor retakes in a retake log in order to identify recurring
problems and improve the quality of future images?
a.
Both statement and reason are true.
b.
Both statement and reason are false.
c.
The statement is true; the reason is false.
d.
The statement is false; the reason is true.