A ⁹⁹Mo-^99mTc generator is calibrated for 1.00 Ci of ⁹⁹Mo at 7:00 AM Monday.The generator is eluted daily Monday through Friday at 8:00 AM, but the workload is especially heavy on Friday so the generator is eluted again at 3:00 PM to obtain more ^99mTc.Assuming 100% elution efficiency, how many mCi of ^99mTc will be eluted at 3:00 PM Friday?

Question

Quizplus · Accepted Answer

The ^99mTc radioactivity expected to be eluted from the generator can be calculated by knowing three values: (1) the activity of ⁹⁹Mo in the generator, (2) the time since the last elution of the generator, and (3) the ratio of ^99mTc to ⁹⁹Mo in the generator.Using the equation, A = Ci F1F1F1S1F1F1F10 e ^-^0.693F1F1F1S1^F1F1F10^{(t/65.9 hr)}, enter in the known values and solve for the unknown.

A 99Mo-99mTc Generator Is Calibrated for 1

A ⁹⁹Mo-^99mTc Generator Is Calibrated for 1