in lung scintography with Tc-99m macroaggregated albumin

Question Number 1609

Question:
in lung scintography with Tc-99m macroaggregated albumin (MAA)

a) typically less than 1 million particles should be injected
b) in the presence of a significant left-to-right shunt the tagged activity should be reduced
c) infants should have a reduction in the number of particles
d) the radiation dose is higher for the gonads than the lungs
e) about 20% of capillaries are occluded by the agent


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