Radiology

Question 1

What is the most common digital image receptor?

Answer 1

charge coupled device

Question 2

Where is the image stored in a latent image?

Answer 2

within the silver halide crystals

Question 3

What are the 5 film processing steps?

Answer 3

Development
Rinse
Fix
Wash
Dry

Question 4

What occurs in the development stage?

Answer 4

halide portion of exposed silver halide REMOVED

Question 5

If the developer is depleted, how does the radiograph turn out?

Answer 5

underdeveloped, LIGHT image

Question 6

If the developer is too concentrated, how will the image turn out?

Answer 6

overdeveloped, DARK

Question 7

What occurs in the rinsing step?

Answer 7

film is rinsed to remove developer and stops developing process

Question 8

What does the fixing solution do to the radiograph?

Answer 8

the solution removes unexposed silver halide and hardens the image

Question 9

Compare fixing time to developing time:

Answer 9

fixing time is 2X developing time

Question 10

The kVp affects what aspects of the beam?

Answer 10

quality AND quantity

Question 11

What filters out low kVp? How does that affect the beam?

Answer 11

aluminum, results in higher energy beam

Question 12

The size of the focal spot affects the?

Answer 12

resolution

Question 13

What restricts the size of the beam as it travels down the position indicating device?

Answer 13

Lead collimator

Question 14

ALARA =

Answer 14

As Low As Reasonably Acceptable

Question 15

What is the maximum radiation exposure for people who work with radiation in one year?

Answer 15

50 mSv

Question 16

If an image is elongated, what mistake occurred?

Answer 16

decreased vertical angulation

Question 17

If an image is foreshortened, what mistake occurred?

Answer 17

Excessive vertical angulation

Question 18

If an image has overlapped contacts, what mistake occurred?

Answer 18

excessive horizontal angulation

Question 19

If the image has poor contrast, what mistake occurred?

Answer 19

kVp too high

Question 20

What is the recommended angulation for a BW?

Answer 20

+5 to +10

Question 21

How is magnification of a radiograph reduced?

Answer 21

• LONG target-receptor distance (use a long position indicating device)
• SHORT object-receptor distance (place receptor closer to the tooth)

Question 22

Which method of radiographic assessment is best for identifying small changes in volume in alveolar bone density?

Answer 22

subtraction radiography

Question 23

Which radiographic assessment is best for identifying small changes in volume in alveolar bone density?

Answer 23

subtraction radiography

Question 24

If the kVp is too high, how will the image be affected?

Answer 24

image will have low contrast

Question 25

Bremsstrahlung radiation is created due to interaction of ____ with ____.

Answer 25

electrons with nuclei

Question 26

What is the latent period?

Answer 26

Time between exposure to radiation and the development of symptoms

Question 27

What is a stochastic effect?

Answer 27

effect that cannot be predicted