A radiopaque compound used as contrast for GI x-ray exams is:
A) radium.
B) barium.
C) lead.
D) fluorescence.
B
Explanation:
A) Radium is a radioactive isotope used for interventional radiotherapy.
B) Correct.
C) Lead is used in protective devices such as shields.
D) Fluorescence is the property by which substances emit light.
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