Deck 15: Radiology

Question 1

Which of the following are two parts of the emulsion?

A) Silver halide and silver oxide
B) Silver bromide and silver oxide
C) Silver bromide and silver halide
D) Gold bromide and gold halide

Answer 1

Silver bromide and silver halide

Question 2

Which of the following is the most radiolucent on a radiograph?

A) Amalgam
B) Air
C) Soft tissues
D) Composite

Answer 2

Air

Question 3

Which of the following should NOT be included in an office's radiation protection guidelines?

A) Cost of radiographs
B) Patients requiring a lead apron and thyroid collar
C) Necessity of a clinical exam prior to prescription of radiographs
D) Settings (mA,kVp,time)for a radiograph unit

Answer 3

Cost of radiographs

Question 4

Chad arrives for his periodontal maintenance visit.The hygienist informs Chad he is due for radiographs.He had a full mouth series 2 years ago.Which radiograph is best to take today?

A) Full mouth series
B) Horizontal bitewings
C) Vertical bitewings
D) Panorex

Question 5

At what distance should you stand from a radiograph unit when exposing patients?

A) 3 feet
B) 6 feet
C) 9 feet
D) 12 feet

Question 6

Which of the following is NOT an intraoral radiograph?

A) Periapical
B) Bitewings
C) Occlusal
D) Panorex

Question 7

Radiation protection guidelines are important to minimize radiation exposure to both the patient and the operator.Estimations of risk associated with dental radiation dose levels are universally considered to be very small.

A) Both statements are true.
B) Both statements are false.
C) The first statement is true; the second is false.
D) The first statement is false; the second is true.

Question 8

Which of the following size images are available for digital radiography imaging systems?

A) 0,1,2
B) 1,2,3
C) 0,2,4
D) 2,3,4

Question 9

Which of the following will NOT appear radiopaque on a radiograph?

A) Implant
B) Porcelain fused to metal crown
C) Amalgam
D) Composite

Question 10

The dentist suspects there is an infection on tooth #29.Which radiograph is best to take?

A) Occlusal
B) Panorex
C) Periapical
D) Bitewing

Question 11

ALARA stands for

A) As Low As Reasonably Acceptable
B) As Low As Reasonably Achievable
C) As Low As Reasonably Acquirable
D) As Low As Reasonably Affective

Question 12

Collimation refers to shaping the radiograph beam to the area that is to be imaged.Using a round collimation instead of a rectangular collimation results in radiation reduction to the patient by 60%.

A) Both statements are true.
B) Both statements are false.
C) The first statement is true; the second is false.
D) The first statement is false; the second is true.

Question 13

Computed radiography is an analog imaging system that uses photostimulable phosphor plates to capture an image.Digital radiography is a digital imaging system that uses sensors and flat panel detectors to capture images that are directly connected to a computer,providing a near instantaneous image.

A) Both statements are true.
B) Both statements are false.
C) The first statement is true; the second is false.
D) The first statement is false; the second is true.

Question 14

Which process removes unexposed and undeveloped silver bromide and silver halide grains?

A) Wash
B) Dry
C) Developer
D) Fixer

Question 15

Which radiographs are often used in orthodontics?

A) Panorex and bitewings
B) Panorex and lateral cephalometric
C) Panorex and full mouth series
D) Lateral cephalometric and bitewings

Question 16

Which analog film processing step removes chemicals from the film?

A) Developer
B) Fixer
C) Wash
D) Dry

Question 17

Justification indicates that you should evaluate each patient individually,taking into account their caries status and risk,oral hygiene,and age.Standing orders should not be set.

A) Both statements are true.
B) Both statements are false.
C) The first statement is true; the second is false.
D) The first statement is false; the second is true.

Question 18

Calculus is more radiolucent than body fluids on radiographs.Fat is more radiopaque than metal on radiographs.

A) Both statements are true.
B) Both statements are false.
C) The first statement is true; the second is false.
D) The first statement is false; the second is true.

Question 19

Which of the following is NOT radiopaque on a radiograph?

A) Enamel
B) Metal
C) Calculus
D) Soft tissue

Question 20

Which is the first step in the analog film processing?

A) Wash
B) Dry
C) Developer
D) Fixer

Question 21

A pantomograph does NOT show

A) Maxilla
B) Mandible
C) Clavicle
D) Nasal cavity

Question 22

(1)A patient comes into your office complaining of a toothache.You want to see the entire tooth on a radiograph.A bitewing radiograph would be the best radiograph to prescribe to achieve this.(2)A patient comes into your office complaining of pain with the left temporomandibular joint.You want to view both the right and left temporomandibular joints.A periapical radiograph would be the best radiograph to prescribe to achieve this.

A) Both 1 and 2 are true.
B) Both 1 and 2 are false.
C) 1 is true; 2 is false.
D) 1 is false; 2 is true.

Question 23

What size of image receptor is NOT found in digital radiography imaging systems?

A) 0
B) 1
C) 2
D) 3

Question 24

Stochastic effects are dose dependent.In dentistry,all ionizing radiation effects involve the possibility of an all-or-nothing effect.

A) Both statements are true.
B) Both statements are false.
C) The first statement is true; the second is false.
D) The first statement is false; the second is true.

Question 25

X-rays have a longer wavelength than gamma rays.Visible light has a higher frequency than radio waves.

A) Both statements are true.
B) Both statements are false.
C) The first statement is true; the second is false.
D) The first statement is false; the second is true.