A hospital radiopharmacy prepares a syringe containing of technetium-99m ( ) at the…

PHYSICS · Subjective · Fermi University Physics · Nuclear Physics · Radioactivity and decay modes · Radioactivity and decay modes

Life at Thermal Energy, Ch Images from attenuation and from decay

Problem

A hospital radiopharmacy prepares a syringe containing

740\,\mathrm{MBq}

of technetium-99m (

t_{1/2} = 6.0\,\mathrm{h}

) at the start of the working day, ready for a series of bone scans. A delay in the clinic list means the last patient is not injected until

15\,\mathrm{h}

later. Find the activity remaining in the syringe at that time, and express it as a percentage of the original

740\,\mathrm{MBq}