What is the primary use for radioisotopes in medical applications?

The primary use for radioisotopes in medical applications pertains to their ability to assist in imaging and sterilization processes. In imaging, radioisotopes are utilized in techniques such as PET scans and SPECT scans to create detailed images of the body's internal structures, allowing healthcare professionals to diagnose conditions like cancer or monitor organ function. This imaging function is a result of the radioisotopes emitting radiation that can be detected and translated into visual representations.

In addition to imaging, certain radioisotopes are also employed in sterilization processes, particularly for medical equipment and supplies. The radiation emitted by these isotopes effectively kills bacteria and other pathogens, ensuring that instruments are safe for use in medical procedures. This dual functionality of radioisotopes—enhancing diagnostic imaging capabilities and contributing to sterilization—highlights their crucial role in modern medicine.

The other options, while they may relate to medical practices, do not accurately capture the primary and broad uses of radioisotopes in healthcare. Heating tissues might refer to different therapies or treatments but is not a central application of radioisotopes. Cleaning instruments usually involves sterilization methods that do not typically utilize radioisotopes. Enhancing visibility might suggest the use of contrast agents, but this