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TEMN Medicina Nuclear Practice Questions - TEMN - Título De Especialista Em Medicina Nuclear (Sociedade Brasileira De Medicina Nuclear AMB) Exam

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A nuclear medicine department elutes a technetium-99m (99mTc) generator at 08:00 AM, obtaining an activity of 740 MBq (20 mCi) in a radiopharmaceutical preparation vial. If the physical half-life of 99mTc is 6.0 hours and no further elution occurs, what is the remaining radioactivity in the vial at 02:00 PM (14:00) on the same day, assuming negligible chemical degradation?
Correct Answer:
370 MBq (10 mCi)

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