A sample of cerium-141 for a diagnostic test was dissolved in saline solution to an activity of 4.5 mCi/mL. If the patient undergoing the test needs a dose of 10. mCi, how much of the solution should be injected into the
Patient?

Question

Quizplus · Accepted Answer

To find out how much of the solution should be injected into the patient, we can use the formula:
Amount of solution = Desired dose / Activity per unit volume
Substituting the given values, we get:
Amount of solution = 10. mCi / 4.5 mCi/mL = 2.22 mL
Rounding off to one decimal place, the answer becomes 2.2 mL, which is option B.

A Sample of Cerium-141 for a Diagnostic Test Was Dissolved