What is an advantage of using a radioactive seed consisting of a radioisotope in a small gold tube to treat a cancerous tumor?

One advantage of using a radioactive seed in a small gold tube to treat a cancerous tumor is that it allows for precise localized radiation therapy, minimizing damage to surrounding healthy tissues. This targeted approach can enhance the effectiveness of treatment while reducing side effects compared to conventional external beam radiation. Additionally, the seeds can be implanted directly into or near the tumor, providing continuous radiation exposure over time, which can improve the likelihood of tumor control.