Question 1

Each of the following is a patient positioning consideration for producing a quality panoramic radiograph EXCEPT one. Which one is the EXCEPTION?

Accepted Answer

A)  The patient must be in a standing position. 
B)  The arches must be positioned within the focal trough. 
C)  The midsagittal plane must be perpendicular to the floor. 
D)  The patient's lips must be closed around a bite block on a cotton roll. 
A)  The patient must be in a standing position. 
B)  The arches must be positioned within the focal trough. 
C)  The midsagittal plane must be perpendicular to the floor. 
D)  The patient's lips must be closed around a bite block on a cotton roll.

Question 2

The patient should be instructed to rest the tongue against the palate during the exposure.

Accepted Answer

A) True 
 B)False

Question 3

The bite block is used to position the arches correctly in the forward-backward dimension of the focal trough.

Accepted Answer

A) True 
 B)False

Question 4

What happens to the radiographic image if intensifying screens and film are not in tight contact?

Accepted Answer

The resultant image is blurry.

Question 5

What is the name of the anatomic landmark that appears on a panoramic image as a radiolucent ovoid or round opening in the center of the ramus of the mandible?

Accepted Answer

Mandibular foramen.

Question 6

Which of the following is the correct reason that a cape-style lead barrier without a thyroid collar be used when exposing panoramic radiographs?

Accepted Answer

A)  Due to the position of the PID, the thyroid collar would block the x-rays. 
B)  It would be difficult for a standing patient to maintain an apron-style barrier. 
C)  This type of lead barrier is less expensive and offsets the cost of the panoramic machine. 
D)  Cape-style barriers represent state-of-the-art new technology. 
A)  Due to the position of the PID, the thyroid collar would block the x-rays. 
B)  It would be difficult for a standing patient to maintain an apron-style barrier. 
C)  This type of lead barrier is less expensive and offsets the cost of the panoramic machine. 
D)  Cape-style barriers represent state-of-the-art new technology.

Question 7

The technique used to show detailed images of structures located within a predetermined plane of tissue while eliminating or blurring those structures in the planes not selected is called "tomography."

Accepted Answer

A) True 
 B)False

Question 8

The genial tubercles appear on a panoramic radiograph as a radiopaque, donut-shaped circle surrounding the lingual foramen.

Accepted Answer

A) True 
 B)False

Question 9

Positioning the arches too far forward in the focal trough, toward the tube head, will result in:

Accepted Answer

A)  the anterior teeth appearing blurred and diminished in width. 
B)  the anterior teeth appearing blurred and magnified. 
C)  an image that appears as an exaggerated smile. 
D)  wide radiopacities superimposed over the anterior teeth. 
A)  the anterior teeth appearing blurred and diminished in width. 
B)  the anterior teeth appearing blurred and magnified. 
C)  an image that appears as an exaggerated smile. 
D)  wide radiopacities superimposed over the anterior teeth.

Question 10

If the patient's head is rotated to the right in the focal trough, the teeth on the right appear magnified.

Accepted Answer

A) True 
 B)False

Question 11

What is the corrective action for a panoramic image that can mimic caries of the anterior teeth?

Accepted Answer

A)  Have the patient raise his or her tongue to the palate during exposure. 
B)  Readjust the patient's head in an upward direction. 
C)  Have the patient close his or her lips on the bite block. 
D)  Readjust the patient's head in a downward direction. 
A)  Have the patient raise his or her tongue to the palate during exposure. 
B)  Readjust the patient's head in an upward direction. 
C)  Have the patient close his or her lips on the bite block. 
D)  Readjust the patient's head in a downward direction.

Question 12

Careful loading of a flexible plastic sleeve cassette must ensure that the film is completely seated within the intensifying screens.

Accepted Answer

A) True 
 B)False

Question 13

Which of the following describes the correct head positioning for a panoramic radiograph?

Accepted Answer

A)  Midsaggital plane parallel to the floor and ala-tragus line perpendicular to the floor 
B)  Frankfort plane and midsaggital plane perpendicular to the floor 
C)  Ala-tragus line parallel to the floor and Frankfort plane 5 degrees toward the floor 
D)  Frankfort plane parallel to the floor and midsaggital plane perpendicular to the floor 
A)  Midsaggital plane parallel to the floor and ala-tragus line perpendicular to the floor 
B)  Frankfort plane and midsaggital plane perpendicular to the floor 
C)  Ala-tragus line parallel to the floor and Frankfort plane 5 degrees toward the floor 
D)  Frankfort plane parallel to the floor and midsaggital plane perpendicular to the floor

Question 14

The radiographer must be skilled at setting the correct size and shape of the focal trough to produce a diagnostic panoramic radiograph.

Accepted Answer

A) True 
 B)False

Question 15

Which of these statements regarding the focal trough is FALSE?

Accepted Answer

A)  Its shape varies from one manufacturer to another. 
B)  It is where structures will be imaged the sharpest. 
C)  It is two-dimensional. 
D)  It is used to determine where to position the dental arches. 
A)  Its shape varies from one manufacturer to another. 
B)  It is where structures will be imaged the sharpest. 
C)  It is two-dimensional. 
D)  It is used to determine where to position the dental arches.

Question 16

What is the name of the anatomic landmark that appears on a panoramic image as a radiopaque, wing-like bony projection of the sphenoid bone located posterior to the maxillary tuberosity?

Accepted Answer

Lateral pt

Question 17

Each of the following statements regarding principles of panoramic radiography is correct EXCEPT one. Which one is the EXCEPTION?

Accepted Answer

A)  The patient stands or is seated in a stationary position. 
B)  The x-ray beam is directed toward the stationary cassette. 
C)  The x-ray tube head moves around the front of the patient. 
D)  The radiation beam passes through the patient toward the cassette. 
A)  The patient stands or is seated in a stationary position. 
B)  The x-ray beam is directed toward the stationary cassette. 
C)  The x-ray tube head moves around the front of the patient. 
D)  The radiation beam passes through the patient toward the cassette.

Question 18

Which of the following facial landmark planes must be positioned slightly (5˚) down toward the floor when positioning the arches within the focal trough?

Accepted Answer

A)  Frankfort 
B)  Ala-tragus 
C)  Midsagittal 
D)  Occlusal 
A)  Frankfort 
B)  Ala-tragus 
C)  Midsagittal 
D)  Occlusal

Question 19

The greatest limitation of panoramic radiographs is the inability to:

Accepted Answer

A)  locate impacted teeth. 
B)  produce image sharpness. 
C)  assess growth and development. 
D)  detect caries in advanced stages. 
A)  locate impacted teeth. 
B)  produce image sharpness. 
C)  assess growth and development. 
D)  detect caries in advanced stages.

Question 20

Positioning the arches too far back in the focal trough, toward the tube head, will result in:

Accepted Answer

A)  the anterior teeth appearing blurred and diminished in width. 
B)  the anterior teeth appearing blurred and magnified. 
C)  an image that appears as an exaggerated smile. 
D)  wide radiopacities superimposed over the anterior teeth. 
A)  the anterior teeth appearing blurred and diminished in width. 
B)  the anterior teeth appearing blurred and magnified. 
C)  an image that appears as an exaggerated smile. 
D)  wide radiopacities superimposed over the anterior teeth.

Exam 30: Radiographic Techniques

Each of the following is a patient positioning consideration for producing a quality panoramic radiograph EXCEPT one. Which one is the EXCEPTION?

The patient should be instructed to rest the tongue against the palate during the exposure.

The bite block is used to position the arches correctly in the forward-backward dimension of the focal trough.

What happens to the radiographic image if intensifying screens and film are not in tight contact?

What is the name of the anatomic landmark that appears on a panoramic image as a radiolucent ovoid or round opening in the center of the ramus of the mandible?

Which of the following is the correct reason that a cape-style lead barrier without a thyroid collar be used when exposing panoramic radiographs?

The technique used to show detailed images of structures located within a predetermined plane of tissue while eliminating or blurring those structures in the planes not selected is called "tomography."

The genial tubercles appear on a panoramic radiograph as a radiopaque, donut-shaped circle surrounding the lingual foramen.

Positioning the arches too far forward in the focal trough, toward the tube head, will result in:

If the patient's head is rotated to the right in the focal trough, the teeth on the right appear magnified.

What is the corrective action for a panoramic image that can mimic caries of the anterior teeth?

Careful loading of a flexible plastic sleeve cassette must ensure that the film is completely seated within the intensifying screens.

Which of the following describes the correct head positioning for a panoramic radiograph?

The radiographer must be skilled at setting the correct size and shape of the focal trough to produce a diagnostic panoramic radiograph.

Which of these statements regarding the focal trough is FALSE?

What is the name of the anatomic landmark that appears on a panoramic image as a radiopaque, wing-like bony projection of the sphenoid bone located posterior to the maxillary tuberosity?

Each of the following statements regarding principles of panoramic radiography is correct EXCEPT one. Which one is the EXCEPTION?

Which of the following facial landmark planes must be positioned slightly (5˚) down toward the floor when positioning the arches within the focal trough?

The greatest limitation of panoramic radiographs is the inability to:

Positioning the arches too far back in the focal trough, toward the tube head, will result in:

Dental Radiography: Historical Perspective and Future Trends

Characteristics and Measurement of Radiation

The Dental X-Ray Machine: Components and Function

Factors Affecting Radiographic Quality

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

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