A lead collimator performs which of the following functions?
It filters out secondary radiation.
It directs the primary beam toward the patient.
It restricts the spread of the x-ray beam to no more than 2.75 inches.
It filters out low-level waves.
It restricts the spread of the x-ray beam to no more than 2.75 inches.
Rationale: It restricts the spread of the x-ray beam to no more than 2.75 inches.
Health Professions
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Laypeople are often trained to perform all of the following skills, EXCEPT:
A. one- or two-rescuer CPR. B. splinting of a possible fracture. C. insertion of an oropharyngeal airway. D. control of life-threatening bleeding.
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Atrial fibrillation is
A) regular. B) irregular. C) regular but interrupted by pauses. D) regular but interrupted by premature beats.
Health Professions