UKMLA PLAB AMC USMLE Prometric MCQ

Question Number 1639

Question:
in the investigation of Gastrointestinal bleeding by Tc-99m sulfur colloid scintigraphy

a) bleeding must be active at time of tracer administration;
b) is more sensitive than angiography
c) imaging should be at every 5 seconds for the first minute
d) ectopic splenic tissue results in a false positive uptake
e) the agent remains in the vascular system for prolonged period

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