UKMLA PLAB AMC USMLE Prometric MCQ

Question Number 1640

Question:
in the investigation of Gastrointestinal bleeding by Tc-99m-labeled RBCs scintigraphy

a) is suitable for upper GI tract hemorrhage
b) is likely to detect a blood loss of one liter per 24 hours
c) a change in the location of uptake with time makes bleeding unlikely
d) there is a relatively high target-to-background ratio
e) the agent remains in the vascular system for prolonged period

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