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Chapter 5

QuestionAnswer
Every patient should be evaluated individually prior to prescribing dental images. True
The 8-inch PID is more effective than the 16-inch PID in reducing radiation exposure of the patient. False
Pointed cones should not be used because of increased scatter radiation. True
The thyroid collar must be worn for both intraoral and extraoral exposures. True
If necessary, the dental radiographer may hold a receptor in the patient’s mouth to ensure a diagnostic image. False
Which statement describes the function of a filter in a dental x-ray tubehead? It removes low-energy x-rays.
Which is not a component of inherent filtration? a leaded PID
Which is the most effective method of reducing patient exposure to radiation? fast films
Which position-indicating device is most effective in reducing patient exposure rectangular
Which device restricts the size and shape of the x-ray beam collimator
Which material is used as a collimator lead
Which describes the function of filtration reduces low-energy waves
Which is the recommended size of the beam at the patient’s face 3.50 inches
Which term describes the dose of radiation that the body can endure with little or no chance of injury? maximum permissible dose
Which statement is true of a radiation monitoring badge? It should be worn at waist level when exposing x-ray receptors.
Provide the requirements for proper filtration: a. Machines operating at 70 kV or lower require __________ mm aluminum. b. Machines operating above 70 kV require __________ mm aluminum. a. Machines operating at 70 kV or lower require 1.5 mm aluminum. b. Machines operating above 70 kV require 2.5 mm aluminum.
State the angle at which the dental radiographer should stand in relationship to the primary beam: 90 to 135 degree angle
State the formula for the cumulative occupational dose: Age (in years) × 10 mSv.
state the maximum permissible dose for occupationally exposed persons: 50 mSv/year (or 5 rem/year).
Created by: user-1799542
 

 



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