What defines a radiopharmaceutical?

A radiopharmaceutical is defined as a compound containing a radioactive isotope that is utilized for either diagnostic or therapeutic purposes. This dual functionality is critical because it highlights how radiopharmaceuticals can be applied not only to visualize biological processes through imaging (such as PET or SPECT scans) but also for therapeutic interventions, such as targeted radiotherapy to destroy cancerous tissues.

The key aspect of a radiopharmaceutical is the inclusion of a radioactive isotope, which enables it to emit radiation detectable by imaging devices or to deliver targeted radiation for treatment. This distinguishes radiopharmaceuticals from non-radioactive compounds, which lack the essential attribute of radioactivity necessary for these specific medical applications. Understanding the versatile roles of radiopharmaceuticals in both diagnostic and therapeutic contexts is crucial for their effective use in medical practice.