Question 1

When viewing film-based,conventional radiographs the practitioner should always view the processed radiograph:

Accepted Answer

A) unmounted. 
B) on a viewbox. 
C) in the darkroom. 
D) using ambient light. 
A) unmounted. 
B) on a viewbox. 
C) in the darkroom. 
D) using ambient light. B

Question 2

What is the advantage of the recessed tube or recessed target design?

Accepted Answer

A) Target-receptor distance (FF
D) increases by half 
B) Target-receptor distance (FF
D) decreases by half 
C) Extended focal distance and the elimination of the longer PID 
D) Decreased focal distance and the elimination of the longer PID 
A) Target-receptor distance (FF
D) increases by half 
B) Target-receptor distance (FF
D) decreases by half 
C) Extended focal distance and the elimination of the longer PID 
D) Decreased focal distance and the elimination of the longer PID C

Question 3

With regard to the inverse square law,if the focal spot-to-film distance (FFD)doubles,the exposure time should:

Accepted Answer

A) decrease by . 
B) Decrease by . 
C) double. 
D) quadruple. 
A) decrease by . 
B) Decrease by . 
C) double. 
D) quadruple. D

Question 4

The sharpness of an image is determined by being able to distinguish the outlines of an object and the ability of the dental image to mimic the smallest details of an object or structure.The size of the target or focal area may influence sharpness.

Accepted Answer

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. 
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 5

Identify the source-to-film distance (FFD)which produces the most amount of image magnification:

Accepted Answer

A) 6 inches. 
B) 8 inches. 
C) 12 inches. 
D) 16 inches. 
A) 6 inches. 
B) 8 inches. 
C) 12 inches. 
D) 16 inches.

Question 6

A step wedge consists of plates of increasing thickness.As the wedge gets thicker,there is an increase in x-ray penetration due to the object density.

Accepted Answer

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. 
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 7

High-contrast images are referred to as long-scale contrast films.

Accepted Answer

A) True 
 B)False

Question 8

Scatter radiation can be reduced by all of the following methods EXCEPT one.Which one is the EXCEPTION?

Accepted Answer

A) Open-ended PIDs 
B) Higher kV settings 
C) Lead foil inside the film packet 
D) Using as small a beam as possible 
A) Open-ended PIDs 
B) Higher kV settings 
C) Lead foil inside the film packet 
D) Using as small a beam as possible

Question 9

All of the following will keep the penumbra as small as possible EXCEPT one.Which one is the EXCEPTION?

Accepted Answer

A) Small focal spot 
B) Angulation of the target 
C) Increased target-object distance 
D) Increased object-receptor distance 
A) Small focal spot 
B) Angulation of the target 
C) Increased target-object distance 
D) Increased object-receptor distance

Question 10

The degree of blackness on an image is known as:

Accepted Answer

A) umbra. 
B) density. 
C) contrast. 
D) penumbra. 
A) umbra. 
B) density. 
C) contrast. 
D) penumbra.

Question 11

In order to increase the contrast on a radiograph one should decrease the kVp.

Accepted Answer

A) True 
 B)False

Question 12

All of the following are enhancing options on the digital system that are useful when viewing the digital image EXCEPT one.Which one is the EXCEPTION?

Accepted Answer

A) Using an illuminator 
B) Changing the density 
C) Changing the contrast 
D) Magnifying the image 
A) Using an illuminator 
B) Changing the density 
C) Changing the contrast 
D) Magnifying the image

Question 13

Penumbra can be described as:

Accepted Answer

A) detail. 
B) blurring. 
C) definition. 
D) sharpness. 
A) detail. 
B) blurring. 
C) definition. 
D) sharpness.

Question 14

Kilovoltage in the 45- to below 60-kV range can produce a diagnostic image,but should not be used because of the amount of secondary (scatter)radiation produced.

Accepted Answer

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. 
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 15

Object contrast is determined by all of the following EXCEPT one.Which one is the EXCEPTION?

Accepted Answer

A) Scatter radiation 
B) Density of the object 
C) Quantity of the x-rays 
D) Chemical composition of the object 
A) Scatter radiation 
B) Density of the object 
C) Quantity of the x-rays 
D) Chemical composition of the object

Question 16

Short-scale contrasts produce shades of gray.

Accepted Answer

A) True 
 B)False

Question 17

The most common cause of poor definition in a radiograph is movement.

Accepted Answer

A) True 
 B)False

Question 18

Film fog is caused by which of the following?

Accepted Answer

A) Scattered radiation 
B) Intensifying screens 
C) Properties of the film 
D) Amount of radiation transmitted 
A) Scattered radiation 
B) Intensifying screens 
C) Properties of the film 
D) Amount of radiation transmitted

Question 19

When using the bisecting method,the object-film distance is kept to a minimum.

Accepted Answer

A) True 
 B)False

Question 20

Long-scale contrast gives the radiograph a (an):

Accepted Answer

A) gray appearance. 
B) fogged appearance. 
C) black and white appearance. 
D) underpenetrated appearance. 
A) gray appearance. 
B) fogged appearance. 
C) black and white appearance. 
D) underpenetrated appearance.

Exam 3: Image Formation

When viewing film-based,conventional radiographs the practitioner should always view the processed radiograph:

What is the advantage of the recessed tube or recessed target design?

With regard to the inverse square law,if the focal spot-to-film distance (FFD)doubles,the exposure time should:

The sharpness of an image is determined by being able to distinguish the outlines of an object and the ability of the dental image to mimic the smallest details of an object or structure.The size of the target or focal area may influence sharpness.

Identify the source-to-film distance (FFD)which produces the most amount of image magnification:

A step wedge consists of plates of increasing thickness.As the wedge gets thicker,there is an increase in x-ray penetration due to the object density.

High-contrast images are referred to as long-scale contrast films.

Scatter radiation can be reduced by all of the following methods EXCEPT one.Which one is the EXCEPTION?

All of the following will keep the penumbra as small as possible EXCEPT one.Which one is the EXCEPTION?

The degree of blackness on an image is known as:

In order to increase the contrast on a radiograph one should decrease the kVp.

All of the following are enhancing options on the digital system that are useful when viewing the digital image EXCEPT one.Which one is the EXCEPTION?

Penumbra can be described as:

Kilovoltage in the 45- to below 60-kV range can produce a diagnostic image,but should not be used because of the amount of secondary (scatter)radiation produced.

Object contrast is determined by all of the following EXCEPT one.Which one is the EXCEPTION?

Short-scale contrasts produce shades of gray.

The most common cause of poor definition in a radiograph is movement.

Film fog is caused by which of the following?

When using the bisecting method,the object-film distance is kept to a minimum.

Long-scale contrast gives the radiograph a (an):

The History of Ionizing Radiation and Basic Principles of X-Ray Generation

The Dental X-Ray Machine

Image Receptors

Biologic Effects of Radiation

Patient Protection

Operator Protection

Infection Control in Dental Radiography

Intraoral Radiographic Technique: the Paralleling Method

Accessory Radiographic Techniques: Bisecting Technique and Occlusal Projections

Film Processing Techniques

Panoramic Radiography

Extraoral Techniques

Radiography of the Temporomandibular Joint

Digital Imaging

Advanced Imaging Systems

Quality Assurance

Patient Management and Special Problems

Film Mounting and Radiographic Anatomy

Principles of Radiographic Interpretation

Caries and Periodontal Disease

Pulpal and Periapical Lesions

Developmental Disturbances of Teeth and Bone

Bone and Other Lesions

Legal Considerations

Filters