Symptoms of urination problems. Symptoms can mirror those of prostate cancer. A physicist develops a plan or map that marks the location for each seed.
Radioactive sources lose their energy over time.
With a half-life of 60 days, a radioactive source would have lost half its energy in 60 days. Physicists and physicians use a decay table for determining the activity level on a given day. The radiation must transverse through healthy tissue to reach the cancerous area. Treatments are generally 5 days per week for 6-7 weeks. This differs from x-rays that provide a film of the image.