Question 1

The bisecting technique should be the radiographer's first choice in exposing periapical radiographs.

Accepted Answer

A) True 
 B)False  False

Question 2

Regulations governing the use of radiation-producing equipment include federal, state, and some local laws.

Accepted Answer

A) True 
 B)False  True

Question 3

Some dental x-ray machines appear to have a short PID when in fact the target surface distance is long. Why?

Accepted Answer

The tube is recessed behind the transformers in the tube head

Question 4

What undesirable effect does collimation reduce?

Accepted Answer

Scatter (secondary) radiation that has b

Question 5

The best way to reduce patient risk from radiation exposure is to keep exposures ALARA.

Accepted Answer

A) True 
 B)False

Question 6

Guidance for deciding when, what type, and how many radiographs to expose on a patient have been developed and should be followed.

Accepted Answer

A) True 
 B)False

Question 7

Based on evidence-based selection criteria for keeping radiation exposure ALARA, a high level of caries experience or demineralization increases a patient's risk for future caries.

Accepted Answer

A) True 
 B)False

Question 8

The federal performance standard for diagnostic x-ray equipment requires that all x-ray equipment meet each of the following radiation safety requirements EXCEPT one. Which one is the EXCEPTION?

Accepted Answer

A)  Collimators may be round or rectangular. 
B)  Both inherent and added filtration is usually required. 
C)  Aluminum filters are required to remove long wavelength x-rays from the beam. 
D)  A pointed, closed-end PID is acceptable. 
A)  Collimators may be round or rectangular. 
B)  Both inherent and added filtration is usually required. 
C)  Aluminum filters are required to remove long wavelength x-rays from the beam. 
D)  A pointed, closed-end PID is acceptable.

Question 9

Medical, dental, and therapeutic radiation is included in the MPD.

Accepted Answer

A) True 
 B)False

Question 10

The function of the collimator in the dental x-ray machine is to:

Accepted Answer

A)  eliminate secondary sources of radiation. 
B)  reduce the size of the x-ray beam. 
C)  eliminate primary sources of radiation. 
D)  allow for faster exposure times. 
A)  eliminate secondary sources of radiation. 
B)  reduce the size of the x-ray beam. 
C)  eliminate primary sources of radiation. 
D)  allow for faster exposure times.

Question 11

High-energy x-rays are the most harmful to the patient because they easily penetrate to the deep tissues of the body.

Accepted Answer

A) True 
 B)False

Question 12

Based on evidence-based selection criteria for keeping radiation exposure ALARA, an adult recall patient with no risk factors for caries would most likely be assessed for bitewing radiographs annually.

Accepted Answer

A) True 
 B)False

Question 13

Fast film requires less radiation for exposure and is essential for reducing radiation to the patient.

Accepted Answer

A) True 
 B)False

Question 14

Each of the following statements regarding radiation protection measures for the patient is correct EXCEPT one. Which one is the EXCEPTION?

Accepted Answer

A)  The oral health care team should embrace the ALARA concept. 
B)  Radiographs must be taken on all new patients. 
C)  Evidence-based selection criteria should be used when determining which patients need radiographs. 
D)  The radiographer should possess a working knowledge of appropriate exposure factors. 
A)  The oral health care team should embrace the ALARA concept. 
B)  Radiographs must be taken on all new patients. 
C)  Evidence-based selection criteria should be used when determining which patients need radiographs. 
D)  The radiographer should possess a working knowledge of appropriate exposure factors.

Question 15

The ALARA concept implies that:

Accepted Answer

A)  any radiation dose that can be reduced without major difficulty, great expense, or inconvenience, should be reduced or eliminated. 
B)  if a radiation dose cannot be reduced without major difficulty, great expense, or inconvenience, then no radiographs should be exposed. 
C)  radiation dosages slightly above the acceptable level of risk are acceptable only in emergency treatment situations. 
D)  fewer radiographs should be taken only if a radiation dose cannot be reduced due to major difficulty, inconvenience, and great expense. 
A)  any radiation dose that can be reduced without major difficulty, great expense, or inconvenience, should be reduced or eliminated. 
B)  if a radiation dose cannot be reduced without major difficulty, great expense, or inconvenience, then no radiographs should be exposed. 
C)  radiation dosages slightly above the acceptable level of risk are acceptable only in emergency treatment situations. 
D)  fewer radiographs should be taken only if a radiation dose cannot be reduced due to major difficulty, inconvenience, and great expense.

Question 16

Thermoluminescent dosimeters (TLDs) contain crystals that absorb energy when exposed to radiation.

Accepted Answer

A) True 
 B)False

Question 17

Absorption of the long wavelength, less penetrating x-rays of the polychromatic beam occurs by passage of the beam through a sheet of aluminum called a .

Accepted Answer

Filter. An aluminum filter is

Question 18

A rectangular PID requires a larger dose of radiation to produce a diagnostic-quality radiograph than a circular PID.

Accepted Answer

A) True 
 B)False

Question 19

Based on evidence-based selection criteria for keeping radiation exposure ALARA, a child recall patient with several risk factors for caries would most likely be assessed for bitewing radiographs every 6 to 12 months.

Accepted Answer

A) True 
 B)False

Question 20

A less divergent x-ray beam will:

Accepted Answer

A)  increase the radiation dose to the patient. 
B)  result in lower-quality radiographic images. 
C)  create a smaller diameter of exposure. 
D)  require added filtration. 
A)  increase the radiation dose to the patient. 
B)  result in lower-quality radiographic images. 
C)  create a smaller diameter of exposure. 
D)  require added filtration.

Exam 6: Radiation Protection

The bisecting technique should be the radiographer's first choice in exposing periapical radiographs.

Regulations governing the use of radiation-producing equipment include federal, state, and some local laws.

Some dental x-ray machines appear to have a short PID when in fact the target surface distance is long. Why?

What undesirable effect does collimation reduce?

The best way to reduce patient risk from radiation exposure is to keep exposures ALARA.

Guidance for deciding when, what type, and how many radiographs to expose on a patient have been developed and should be followed.

Based on evidence-based selection criteria for keeping radiation exposure ALARA, a high level of caries experience or demineralization increases a patient's risk for future caries.

The federal performance standard for diagnostic x-ray equipment requires that all x-ray equipment meet each of the following radiation safety requirements EXCEPT one. Which one is the EXCEPTION?

Medical, dental, and therapeutic radiation is included in the MPD.

The function of the collimator in the dental x-ray machine is to:

High-energy x-rays are the most harmful to the patient because they easily penetrate to the deep tissues of the body.

Based on evidence-based selection criteria for keeping radiation exposure ALARA, an adult recall patient with no risk factors for caries would most likely be assessed for bitewing radiographs annually.

Fast film requires less radiation for exposure and is essential for reducing radiation to the patient.

Each of the following statements regarding radiation protection measures for the patient is correct EXCEPT one. Which one is the EXCEPTION?

The ALARA concept implies that:

Thermoluminescent dosimeters (TLDs) contain crystals that absorb energy when exposed to radiation.

Absorption of the long wavelength, less penetrating x-rays of the polychromatic beam occurs by passage of the beam through a sheet of aluminum called a .

A rectangular PID requires a larger dose of radiation to produce a diagnostic-quality radiograph than a circular PID.

Based on evidence-based selection criteria for keeping radiation exposure ALARA, a child recall patient with several risk factors for caries would most likely be assessed for bitewing radiographs every 6 to 12 months.

A less divergent x-ray beam will:

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

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

Filters