Lesson 5.1: Basic Dental Radiology

Question 1

The method of capturing images; enables the dentist to diagnose conditions in the oral cavity

Answer 1

Digital Imaging

Question 2

This relates to the degree of darkness on an image

Answer 2

Density

Question 3

This is an important factor in image quality; a certain amount of this is needed in order for a quality diagnostic image to be formed

Answer 3

Density

Question 4

Refers to the darkness and lightness (differences in density) on various areas of the images

Answer 4

Contrast

Question 5

This is important because it defines, or better demonstrates the structure under examination

Answer 5

Contrast

Question 6

Structures that are dense and do not permit the passage of radiation

Answer 6

Radiopaque

Question 7

The more radiopaque a structure is, the _______ it appears on the image

Answer 7

Lighter

Question 8

Structures that are less dense and permit passage of radiation

Answer 8

Radiolucent

Question 9

The more radiolucent a structure is, the _______ it appears on the image

Answer 9

Darker

Question 10

Who discovered x rays?

Answer 10

Wilhelm Conrad Roentgen

Question 11

What year did Wilhelm Conrad Roentgen discover xrays?

Answer 11

1895

Question 12

Who exposed the first dental radiograph?

Answer 12

Dr. Otto Walkfhoff

Question 13

What year did Dr. Otto Walkhoff expose the first dental radiograph?

Answer 13

1896

Question 14

Who is credited with the first practical use of dental radiographs?

Answer 14

Dr. C. Edmund Kells

Question 15

What are atoms composed of?

Answer 15

Protons, Neutrons, and Electrons

Question 16

How fast does radiation travel?

Answer 16

186,000 miles per second

Question 17

TRUE OR FALSE:

Radiation travels at the speed of light

Answer 17

True

Question 18

The central portion of the primary beam of radiation

Answer 18

Central Beam

Question 19

Radiation produced from any substance being struck by primary radiation

Answer 19

Secondary Radiation

Question 20

A form of secondary radiation that occurs when an x-ray beam has been deflected from its path

Answer 20

Scatter Radiation

Question 21

TRUE OR FALSE:

It’s ok to spray the tubehead and control panel of an e-ray machine with disinfectant spray

Answer 21

False

Spraying the tubehead and control panel can cause malfunction/damage

Question 22

What does ALARA stand for?

Answer 22

As Low As Reasonably Achievable

Question 23

How is the amount of damage from radiation determined?

Answer 23

1. Quantity (amount) of radiation exposure
2. Quality (intensity) of radiation exposure
3. Length (time) of exposure
4. Type of tissue being irradiated

Question 24

This serves as a guide to the operator for safe image capturing techniques

Answer 24

ALARA Concept

Question 25

This helps detect cumulative operator radiation exposure

Answer 25

Dosimeter/Film Badge

Question 26

TRUE OR FALSE: | It's ok to hold the sensor for the patient if needed

Answer 26

False | Under NO CONDITIONS will the operator hold the sensor for the patient during the exposure

Question 27

TRUE OR FALSE: | NEVER stand in the path of the primary beam

Answer 27

True

Question 28

A part of the tubehead that ensures only high quality radiation waves reach the patient

Answer 28

Aluminum Filtration

Question 29

A part of the tubehead that reduces the area of exposure of the primary beam. May have a round or rectangular opening

Answer 29

Collimation

Question 30

Lead-lined Cone

Answer 30

Position Indicator Device

Question 31

This absorbs and reduces scatter radiation as the x-ray beam travels down the cone toward the teeth

Answer 31

Position Indicator Device

Question 32

A feature that minimizes the amount of scatter radiation that both the patient and the dental assistant can be vulnerable to while images are being captured

Answer 32

Position Indicator Device

Question 33

This is used to check exposure settings and processing; used daily prior to the first patient

Answer 33

Step Wedge