A family member is about to have a brain scan using technetium-99m, an excited isotope with 6.01-hour half-life. The hospital makes Tc-99m from the decay of molybdenum-99 (t_1/2 = 2.7 days), then delivers it to the nuclear medicine department. You?re told that the Tc-99m will arrive 90 minutes after production, and that there must be 10 mg of it. The technician says she will produce 12 mg of Tc-99m. Is that sufficient?

Transcribed Image Text:

Time (days) 0.25 0.5 0.75 1.0 Activity (kBq) 200 103 54 29 17 Time (days) 1.3 5.0 10 15 Activity (kBq) 4.6 3.2 2.1 1.4