What formats are 192Ir sources available for brachytherapy?

In brachytherapy, the most common forms of 192Ir (Iridium-192) sources are indeed seeds and wires. These forms allow for precise delivery of radiation to the tumor while minimizing exposure to surrounding healthy tissue.

192Ir seeds are small, encapsulated sources that provide straightforward implantation into or near the tumor site, facilitating a localized radiation dose. Wires, on the other hand, are typically used in afterloading techniques where the radioactive material is inserted into a catheter temporarily positioned in the treatment area. This method allows for better control over the radiation exposure duration and intensity.

Understanding these formats is essential for medical dosimetry, as the choice between seeds and wires can influence treatment planning, dosage distribution, and overall efficacy of the brachytherapy procedure. The other formats mentioned in the other choices, while relevant in different contexts, do not accurately reflect the commercially and clinically available forms specifically for 192Ir brachytherapy sources.