Which of the following is the most efficient means of beam restriction?
collimator
wedge filter
aperture diaphragm
extension cone
collimator
Rationale: The collimators are placed close to the tube port to control the amount of off-focus radiation leaving the tube.
Health Professions
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Which of the following may result in imprisonment for more than one year?
a. Misdemeanor b. Felony c. Vandalism d. Trespassing
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Which of the following is NOT a function of the skin?
A. Temperature regulation B. Protection from the environment C. Transmission of information to the brain D. Production of antibodies to foreign organisms
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