Radioactive isotopes have numerous applications in medicine, primarily in diagnostic imaging, therapeutic treatments, and research.
4 Key Uses of Radioactive Isotopes in Medicine
1. Diagnostic Imaging
Radioactive isotopes are used in imaging techniques such as Positron Emission Tomography (PET) and Single Photon Emission Computed Tomography (SPECT).
In PET scans, a radioactive tracer is injected into the patient's body, which emits positrons.
When these positrons collide with electrons, they produce gamma rays that are detected by the scanner, providing detailed images of the body's internal structures and functions.
SPECT works similarly, using gamma rays emitted by the tracer to create 3D images.
These imaging techniques help diagnose diseases like cancer, heart disease, and neurological disorders by visualizing metabolic processes and blood flow.
2. Therapeutic Treatments
Radioactive isotopes are also used in therapeutic treatments, particularly in cancer therapy.
Brachytherapy and radiopharmaceuticals are common methods.
In brachytherapy, small radioactive seeds are placed directly into or near a tumor, delivering high doses of radiation to the cancerous cells while minimizing exposure to healthy tissues.
Radiopharmaceuticals are drugs containing radioactive isotopes that are administered to patients to target and kill cancer cells.
For example, iodine-131 is used to treat thyroid cancer, and yttrium-90 is used in treating liver cancer.
3. Research
In medical research, radioactive isotopes are used as tracers to study various biological processes.
For instance, they help researchers understand how drugs are metabolized, how nutrients are absorbed, and how diseases progress.
This research aids in developing new treatments and medications.
4. Safety and Handling
The safe use of radioactive isotopes in medicine is paramount.
Medical professionals undergo extensive training in radiation safety to handle these isotopes correctly.
They use protective equipment and follow strict protocols to minimize exposure to both patients and themselves.
Additionally, the facilities where these isotopes are used are designed to contain radiation and ensure the safety of all personnel.
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