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An Ir-192 HDR unit has an activity of 8.6 Ci on May 2. The treatment time for a vaginal cylinder is 300 seconds. If the treatment time for a similar treatment is not to exceed 10 minutes, the source must be changed on:
A. July 15
B. June 23
C. July 1
D. August 5

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Solution Summary

We determine the date by which a source of iridium-192 must be replaced in order to have enough activity for a medical treatment.

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Iridium-192 has a half-life of approximately 74 days, so after ...

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