Question 1

What types of tissues or structures appear radiopaque on radiographs?

Accepted Answer

Hard tissues, such as enamel, dentin, and bone

Question 2

When changing the PID length from 8 inches (20.5 cm) to 16 inches (41 cm), what corresponding change must be made to maintain image density?

Accepted Answer

A)  Decrease exposure time. 
B)  Increase exposure time. 
C)  Decrease kilovoltage. 
D)  Increase kilovoltage. 
A)  Decrease exposure time. 
B)  Increase exposure time. 
C)  Decrease kilovoltage. 
D)  Increase kilovoltage. B

Question 3

What is radiographic density?

Accepted Answer

The degree of image blackening (darkening). The darkening of a dental radiograph occurs when x-rays strike sensitive crystals in the film's emulsion, leading to a blackening after processing. When using a digital sensor, sensitive pixels capture the radiation, and "processing" by computer software produces darker pixels.

Question 4

Which of these is NOT a shadow-casting principle?

Accepted Answer

A)  A large focal spot 
B)  Long target-image receptor distance 
C)  Short object-image receptor distance 
D)  Parallel object-image receptor relationship 
A)  A large focal spot 
B)  Long target-image receptor distance 
C)  Short object-image receptor distance 
D)  Parallel object-image receptor relationship

Question 5

A radiographic image with many shades of gray is said to have low contrast.

Accepted Answer

A) True 
 B)False

Question 6

Each of the following results in image unsharpness EXCEPT one. Which one is the EXCEPTION?

Accepted Answer

A)  Patient movement during exposure 
B)  Image receptor positioned close to the teeth 
C)  A short PID 
D)  The use of intensifying screens 
A)  Patient movement during exposure 
B)  Image receptor positioned close to the teeth 
C)  A short PID 
D)  The use of intensifying screens

Question 7

The degree of overall blackness of a radiographic image is termed:

Accepted Answer

A)  sharpness. 
B)  density. 
C)  resolution. 
D)  contrast. 
A)  sharpness. 
B)  density. 
C)  resolution. 
D)  contrast.

Question 8

Each of the following appear radiopaque EXCEPT one. Which one is the EXCEPTION?

Accepted Answer

A)  Bone 
B)  Dentin 
C)  Pulp 
D)  Enamel 
A)  Bone 
B)  Dentin 
C)  Pulp 
D)  Enamel

Question 9

What is the relationship between kVp and contrast?

Accepted Answer

The answer of What is the relationship between kVp and...

Question 10

The film should be in close physical contact with the intensifying screens.

Accepted Answer

A) True 
 B)False

Question 11

Grids absorb scattered x-rays.

Accepted Answer

A) True 
 B)False

Question 12

An original radiograph is exposed at 8 mA for 1.0 seconds. If the mA is increased to 10, which of the following exposure times would be correct to maintain radiographic density?

Accepted Answer

A)  0.4 
B)  0.6 
C)  0.8 
D)  1.0 
A)  0.4 
B)  0.6 
C)  0.8 
D)  1.0

Question 13

The target-image receptor distance should be short to create radiographs with the best definition.

Accepted Answer

A) True 
 B)False

Question 14

The term "short-scale contrast" describes a radiograph in which density differences between adjacent areas are small.

Accepted Answer

A) True 
 B)False

Question 15

What is short-scale contrast?

Accepted Answer

A radiograph that displays bla

Question 16

Sharpness/definition refers to the detail and clarity of the structures on a radiograph.

Accepted Answer

A) True 
 B)False

Question 17

That portion of the radiographic image that appears light is called "radiolucent."

Accepted Answer

A) True 
 B)False

Question 18

Each of the following is a term used to describe visual image characteristics EXCEPT one. Which one is the EXCEPTION?

Accepted Answer

A)  Sharpness 
B)  Contrast 
C)  Milliamperage 
D)  Density 
A)  Sharpness 
B)  Contrast 
C)  Milliamperage 
D)  Density

Question 19

Why should the x-ray film be placed parallel to the long axis of the tooth?

Accepted Answer

To minimize distortion. Distortion resul

Question 20

Image magnification can be decreased by:

Accepted Answer

A)  increasing the target-object distance. 
B)  increasing the object-image receptor distance. 
C)  decreasing the target-surface distance. 
D)  increasing the focal spot size. 
A)  increasing the target-object distance. 
B)  increasing the object-image receptor distance. 
C)  decreasing the target-surface distance. 
D)  increasing the focal spot size.

Exam 4: Factors Affecting Radiographic Quality

What types of tissues or structures appear radiopaque on radiographs?

When changing the PID length from 8 inches (20.5 cm) to 16 inches (41 cm), what corresponding change must be made to maintain image density?

What is radiographic density?

Which of these is NOT a shadow-casting principle?

A radiographic image with many shades of gray is said to have low contrast.

Each of the following results in image unsharpness EXCEPT one. Which one is the EXCEPTION?

The degree of overall blackness of a radiographic image is termed:

Each of the following appear radiopaque EXCEPT one. Which one is the EXCEPTION?

What is the relationship between kVp and contrast?

The film should be in close physical contact with the intensifying screens.

Grids absorb scattered x-rays.

An original radiograph is exposed at 8 mA for 1.0 seconds. If the mA is increased to 10, which of the following exposure times would be correct to maintain radiographic density?

The target-image receptor distance should be short to create radiographs with the best definition.

The term "short-scale contrast" describes a radiograph in which density differences between adjacent areas are small.

What is short-scale contrast?

Sharpness/definition refers to the detail and clarity of the structures on a radiograph.

That portion of the radiographic image that appears light is called "radiolucent."

Each of the following is a term used to describe visual image characteristics EXCEPT one. Which one is the EXCEPTION?

Why should the x-ray film be placed parallel to the long axis of the tooth?

Image magnification can be decreased by:

Dental Radiography: Historical Perspective and Future Trends

Characteristics and Measurement of Radiation

The Dental X-Ray Machine: Components and Function

Effects of Radiation Exposure

Radiation Protection

Dental X-Ray Film and Processing Methods

Digital Radiography and Image Acquisition

Infection Control

Legal and Ethical Responsibilities

Patient Relations and Education

Introduction to Radiographic Examinations

The Periapical Examinationparalleling Technique

The Periapical Examinationbisecting Technique

The Bitewing Examination

The Occlusal Examination

The Panoramic Examination

Identifying and Correcting Undiagnostic Radiographs

Quality Control and Environmental Safety in Dental Radiography

Image Orientation and Introduction to Interpretation

Recognizing Normal Radiographic Anatomy Intraoral Radiographs

Recognizing Normal Radiographic Anatomy Panoramic Radiographs

Radiographic Appearance of Dental Materials and Foreign Objects

The Use of Radiographs in the Detection of Dental Caries

The Use of Radiographs in the Evaluation of Periodontal Diseases

Describing Radiographic Anomalies, Lesions, and Opportunistic Screening

Pediatric Radiographic Techniques

Radiographic Techniques for Patients With Special Needs

Radiographic Techniques for Specific Oral Conditions

Radiographic Techniques

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