Question 1

Which of the following statements about dental radiographic exposure variables is true?

Accepted Answer

A)  Increasing the mA darkens the radiograph. 
B)  Decreasing exposure time darkens the radiograph. 
C)  Exposure time is difficult to change on most machines. 
D)  Milliamperage affects radiographic contrast. 
A)  Increasing the mA darkens the radiograph. 
B)  Decreasing exposure time darkens the radiograph. 
C)  Exposure time is difficult to change on most machines. 
D)  Milliamperage affects radiographic contrast.

Question 2

What types of tissues or structures appear radiolucent on radiographs?

Accepted Answer

Soft tissues, such as the pulp

Question 3

Some clinicians prefer a radiographic image that is of low contrast, and others prefer a radiographic image that is of high contrast.

Accepted Answer

A) True 
 B)False

Question 4

The target-object distance is the distance between the focal spot on the target and the skin surface of the patient.

Accepted Answer

A) True 
 B)False

Question 5

Thicker intensifying screens increase the sharpness of extraoral radiographs.

Accepted Answer

A) True 
 B)False

Question 6

The inverse square law states that the intensity of the radiation:

Accepted Answer

A)  increases as the distance from its source increases because the beam of radiation converges. 
B)  decreases as the distance away from its source increases because the beam of radiation diverges. 
C)  increases as the distance away from its source increases because the beam of radiation diverges. 
D)  decreases as the distance away from its source increases because the beam of radiation converges. 
A)  increases as the distance from its source increases because the beam of radiation converges. 
B)  decreases as the distance away from its source increases because the beam of radiation diverges. 
C)  increases as the distance away from its source increases because the beam of radiation diverges. 
D)  decreases as the distance away from its source increases because the beam of radiation converges.

Question 7

Which kVp setting produces long-scale image contrast?

Accepted Answer

A)  65 kVp 
B)  75 kVp 
C)  85 kVp 
D)  95 kVp 
A)  65 kVp 
B)  75 kVp 
C)  85 kVp 
D)  95 kVp

Question 8

Radiographic image unsharpness is generally caused by movement of the patient, image receptor, or tube head during exposure.

Accepted Answer

A) True 
 B)False

Question 9

Radiographic density (film darkening) is decreased when the milliamperage or exposure time is increased.

Accepted Answer

A) True 
 B)False

Question 10

Which of the following refers to a radiographic image that is black and white with many shades of gray in between?

Accepted Answer

A)  Low contrast 
B)  High contrast 
C)  Low density 
D)  High density 
A)  Low contrast 
B)  High contrast 
C)  Low density 
D)  High density

Question 11

What is radiographic contrast?

Accepted Answer

Contrast refers to h

Question 12

Penumbra is a device used in extraoral radiography to prevent scatter radiation from fogging the image receptor.

Accepted Answer

A) True 
 B)False

Question 13

The difference in densities between adjacent areas on the radiograph is termed:

Accepted Answer

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

Question 14

Which of these statements is FALSE?

Accepted Answer

A)  Increasing the target-image receptor distance reduces penumbra. 
B)  Radiation intensity is directly proportional to the square of the distance from the source. 
C)  A long PID increases image sharpness. 
D)  A recessed tube increases the target-image receptor distance. 
A)  Increasing the target-image receptor distance reduces penumbra. 
B)  Radiation intensity is directly proportional to the square of the distance from the source. 
C)  A long PID increases image sharpness. 
D)  A recessed tube increases the target-image receptor distance.

Question 15

Slight movement of the tube head during exposure of a radiograph effectively increases the size of the focal spot on the target within the tube head.

Accepted Answer

A) True 
 B)False

Question 16

Which of these statements is FALSE?

Accepted Answer

A)  Structures should be magnified to enhance interpretation. 
B)  An area of interest must be recorded completely with sufficient surrounding structures for a frame of reference. 
C)  A radiograph should be of proper density, contrast, and definition. 
D)  An image should be free of errors. 
A)  Structures should be magnified to enhance interpretation. 
B)  An area of interest must be recorded completely with sufficient surrounding structures for a frame of reference. 
C)  A radiograph should be of proper density, contrast, and definition. 
D)  An image should be free of errors.

Question 17

Theoretically, the ideal focal spot would be a point source.

Accepted Answer

A) True 
 B)False

Question 18

The quality of the beam of radiation is determined by which exposure factor?

Accepted Answer

kVp. The quality of the beam r

Question 19

What is penumbra?

Accepted Answer

The fuzzy, unsharp zone around objects o

Question 20

A radiographic film with a small crystal size

Accepted Answer

A)  creates sharpness. 
B)  causes magnification. 
C)  decreases exposure time. 
D)  increases contrast. 
A)  creates sharpness. 
B)  causes magnification. 
C)  decreases exposure time. 
D)  increases contrast.

Exam 4: Factors Affecting Radiographic Quality

Which of the following statements about dental radiographic exposure variables is true?

What types of tissues or structures appear radiolucent on radiographs?

Some clinicians prefer a radiographic image that is of low contrast, and others prefer a radiographic image that is of high contrast.

The target-object distance is the distance between the focal spot on the target and the skin surface of the patient.

Thicker intensifying screens increase the sharpness of extraoral radiographs.

The inverse square law states that the intensity of the radiation:

Which kVp setting produces long-scale image contrast?

Radiographic image unsharpness is generally caused by movement of the patient, image receptor, or tube head during exposure.

Radiographic density (film darkening) is decreased when the milliamperage or exposure time is increased.

Which of the following refers to a radiographic image that is black and white with many shades of gray in between?

What is radiographic contrast?

Penumbra is a device used in extraoral radiography to prevent scatter radiation from fogging the image receptor.

The difference in densities between adjacent areas on the radiograph is termed:

Which of these statements is FALSE?

Slight movement of the tube head during exposure of a radiograph effectively increases the size of the focal spot on the target within the tube head.

Which of these statements is FALSE?

Theoretically, the ideal focal spot would be a point source.

The quality of the beam of radiation is determined by which exposure factor?

What is penumbra?

A radiographic film with a small crystal size

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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