What is penumbra?
What will be an ideal response?
The fuzzy, unsharp zone around objects on a radiograph. Penumbra cannot be eliminated, but it can be minimized by increasing the target-film distance; decreasing the object-film distance; and avoiding movement of the film, the patient, and the tube head.
Health Professions
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All are relative contraindications for fibrinolytic therapy except:
A) pregnancy B) severe uncontrolled hypertension C) known intracranial neoplasm D) recent trauma, previous eight weeks
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Which of the following are components that have not been protected from rust or corrosion?
A. Power tools B. Plated surfaces C. Fiberglass handles D. Unprotected metal surfaces
Health Professions