A radiation source used external to the body for therapeutic purposes must have a much shorter half-life than radioisotopes that are ingested for diagnostic purposes.

Question

Quizplus · Accepted Answer

Radioisotopes used externally for therapeutic purposes often have longer half-lives to allow for repeated use over time, whereas those ingested for diagnostic purposes typically have shorter half-lives to minimize radiation exposure to the patient.

A Radiation Source Used External to the Body for Therapeutic