Radiology

Question 1

The rectangular PID is the most effective in….

Answer 1

reducing patient exposure

Question 2

What restricts the size and shape of the X-ray beam?

Answer 2

Collimator

Question 3

What is a collimator made of?

Answer 3

lead

Question 4

The dose of radiation that the body can endure with little or no chance in injury is….

Answer 4

Maximum permissible dose

Question 5

what does anatomical landmarks on maxillary central incisors include

Answer 5

incisive foremen, nasal fossa, and maxillary sinus

Question 6

what are multiple images on a film caused by?

Answer 6

double exposure

Question 7

What is taken to obtain diagnostic information?

Answer 7

Dental S-rays

Question 8

What does the amount of radiation exposure and individual receives depend on?

Answer 8

Film speed, collimation, technique, and exposure factors

Question 9

What size films are used to expose posterior periapical and adult bitewing projections?

Answer 9

Size 2 films

Question 10

Who is the only person that should be in the path of the useful beam?

Answer 10

The patient

Question 11

What does the paralleling technique produce?

Answer 11

An image without distortion and magnification

Question 12

What are the set up sets to follow in exposing?

Answer 12

1. place film
2. set vertical angulation
3. set horizontal angulation
4. center PID (cone) over the film

Question 13

Radiographs that show a half-moon shaped area of unexposed film is the result of what?

Answer 13

result of the cone being centered over the teeth

Question 14

what is the ultimate goal of a good radiographic technique?

Answer 14

To limit the amount of radiation the patient receives

Question 15

What is a dark film caused by?

Answer 15

Over developing and developer solution too hot

Question 16

Anterior films are placed?

Answer 16

vertically

Question 17

Posterior films are placed?

Answer 17

Horizontally

Question 18

What is the result of an image that is foreshortened?

Answer 18

Too much vertical angulation

Question 19

Why is E speed film more preferable to D speed film?

Answer 19

requires a shorter exposure time therefore less patient radiation

Question 20

What is the identification dot on the film significant for?

Answer 20

requires a shorter exposure time therefore less patient radiation

Question 21

What will a film that is accidentally exposed to light before processing look like?

Answer 21

it will appear black after processing

Question 22

What is the purpose of fixing solution?

Answer 22

to stop the action of the developer

Question 23

What can incorrect vertical angulation produce?

Answer 23

elongation and foreshortening

Question 24

What is the primary use of bitewing projection?

Answer 24

To evaluate the proximal surfaces of the teeth

Question 25

What vertical angulation is correct for bitewing films

Answer 25

+10

Question 26

What does incorrect horizontal angulation result in?

Answer 26

overlapping

Question 27

What is the proper order of films in automatic processor?

Answer 27

1. Develop 2. Fix 3. Rinse 4. Dry

Question 28

What may not be equipped with proper filtration in the office?

Answer 28

Older radiology equipment

Question 29

What is the dentist responsible for?

Answer 29

all aspects of safe radiation

Question 30

What is the full series of E-speed film equivalent to?

Answer 30

1.5 days of background exposure

Question 31

What is referred to as quality assurance?

Answer 31

to produce consistent high quality images with a minimum of exposure to your patient

Question 32

The white landmarks or areas on the processed film is described as what?

Answer 32

Radiopaque

Question 33

What does the lead apron reduce?

Answer 33

scattered radiation

Question 34

How far away should you position yourself from the X-ray tube head?

Answer 34

at least 8 feet

Question 35

What goes first when adding chemicals into processor?

Answer 35

fixer

Question 36

degree of blackness

Answer 36

density

Question 37

What is the number of electrons produced per second (quality)

Answer 37

Milliampers (MA)

Question 38

What controls the speed of electrons?

Answer 38

KVP

Question 39

What is from the lightest to the darkest (shades of gray)

Answer 39

contrast

Question 40

What controls the number of seconds the electrons are produced by

Answer 40

timer

Question 41

What is a negatively charged end of the X-ray tube

Answer 41

Cathode

Question 42

What removes the low energy x-ray?

Answer 42

filter

Question 43

What tungsten inset in anode

Answer 43

target

Question 44

What is the positively charged end of the x-ray tube

Answer 44

anode

Question 45

What is the lead diaphragm that restricts the size of the shape of the x-ray

Answer 45

collimator