bone scintigraphy

Question Number 1576

in the use of diphosphonates in bone scintigraphy

a) the radiation dose is higher for the bladder than for bone
b) the presence of about 5% free Tc-99m in the agent is acceptable
c) in three-phase bone scanning images are taken 24 hours after injection
d) the agent binds to hydroxyapatite crystals
e) the agent should not be used prior to 30 minutes after preparation

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